Lexicost
AI voice agents / Vendors

Retell AI

In its own words: “Retell AI lets contact center teams build, test, and deploy AI phone agents that answer and place calls, qualify leads, book appointments, and transfer to a human when needed.”

11 of 11 key facts published, pages read .

Developer platforms. Hosted, self-serve services that run the whole call: phone numbers, speech, the AI model and call control, usually priced per minute.

What Retell AI publishes, in short. Platform fee per minute: (Pay as you go). What that fee includes: (Pay as you go). Monthly plan fee: . How the AI model is charged: (Pay as you go). Every figure below opens Retell AI's own words and the date we read them.

Work out a cost with these figures: billed minutes: how vendors round a call, concurrency limits for AI voice agents, cost per call: AI agent or a person, aI voice agent cost per minute, openAI Realtime API cost per minute. Compare with other vendors in the side by side table.

Price

Platform fee per minutePay as you go
What that fee includesPay as you go
Monthly plan feePay as you go
Minimum commitmentPay as you go
How the AI model is chargedPay as you go
How the AI model is chargedPay as you go
US phone minutesPay as you go
US phone minutesPay as you go
PlanPay as you go
PlanEnterprise
Minutes included
Price per minute beyond the plan
AI model rate per minutePay as you go
AI model rate per minutePay as you go
AI model rate per minutePay as you go
AI model rate per minutePay as you go
AI model rate per minutePay as you go
AI model rate per minutePay as you go
AI model rate per minutePay as you go
AI model rate per minutePay as you go
AI model rate per minutePay as you go
AI model rate per minutePay as you go
AI model rate per million tokens
Speech-to-text rate
Voice (text-to-speech) ratePay as you go
Voice (text-to-speech) ratePay as you go
Voice (text-to-speech) ratePay as you go
Voice (text-to-speech) ratePay as you go
Voice (text-to-speech) ratePay as you go
Voice (text-to-speech) ratePay as you go
Voice (text-to-speech) ratePay as you go
Voice (text-to-speech) ratePay as you go
Voice (text-to-speech) ratePay as you go
Voice (text-to-speech) ratePay as you go
Realtime speech model ratePay as you go
Realtime speech model ratePay as you go
Realtime speech model ratePay as you go
Realtime speech model ratePay as you go
Realtime speech model ratePay as you go
Realtime speech model ratePay as you go
Realtime speech model ratePay as you go
Realtime speech model ratePay as you go
Other phone ratesPay as you go
Other phone ratesPay as you go
Other phone ratesPay as you go
Other phone ratesPay as you go
Other phone ratesPay as you go
Other phone ratesPay as you go
Other phone ratesPay as you go
Other phone ratesPay as you go
Other phone ratesPay as you go
Other phone ratesPay as you go
Phone number, per monthPay as you go
Phone number, per month
Add-on feePay as you go
Add-on feePay as you go
Add-on feePay as you go
Add-on feePay as you go
Add-on feePay as you go
Add-on feePay as you go
Add-on feePay as you go
Add-on feePay as you go
Add-on feePay as you go
Add-on feeEnterprise
Volume discountEnterprise

Billing rules

How a minute is billedPay as you go
Minimum billed per call
Fee per call attemptPay as you go
Billing rulePay as you go
Billing rulePay as you go
Billing rulePay as you go
Billing rule
Billing rule
Billing rulePay as you go
Billing rulePay as you go
Billing rulePay as you go
Billing rulePay as you go
Billing rulePay as you go

Capacity

Calls at once, includedPay as you go
Calls at once, includedEnterprise
Each extra call at oncePay as you go
When you exceed the limit
When you exceed the limit
Burst above the limit
Other limits
Other limits
Other limits
Other limits

Getting started

Free credit or trialPay as you go
Sign up without salesPay as you go

Compliance

HIPAA agreement (BAA)
HIPAA agreement (BAA)
HIPAA agreement (BAA)
SOC 2
Where data is processed
Other compliance statements
Other compliance statements
Other compliance statementsEnterprise
Other compliance statements
Other compliance statements
Other compliance statements

Product

Latency the vendor states
Bring your own model, voice or carrier
Bring your own model, voice or carrier
White label for agencies
Uptime commitment
Support by planPay as you go
Support by planEnterprise
Turn-taking setting
Turn-taking setting
Turn-taking setting
Turn-taking setting
Turn-taking setting
Turn-taking setting
Turn-taking setting
Turn-taking setting
Turn-taking setting
Turn-taking setting
How the vendor defines a resolved or contained call
How the vendor defines a resolved or contained call
How the vendor defines a resolved or contained call

Where Retell AI's own pages say different things

Both statements are quoted with their pages. We do not pick one. Ask the vendor which applies before you rely on either.

What changed

  • 30 Sep 2026. Workspaces on legacy monthly billing move to prepaid credit-based billing; Enterprise workspaces stay on monthly invoicing. (was Monthly post-usage invoices, now Prepaid credit balance) source
  • 2 Jul 2026. Free LLM token allowance before the prompt-size surcharge raised to 4,000 tokens. (was 3,500 tokens (May 16, 2025 entry), now 4,000 tokens) source
  • 19 Mar 2026. ElevenLabs TTS pricing change on March 23: ElevenLabs TTS starts at $0.04/min, varying by model. source
  • 10 Feb 2026. Concurrency billing changed to charge when capacity is added, prorated by day. (was Charged at the end of the month, now Charged when added, prorated by day) source
  • 10 Feb 2026. Invoices now show TTS and voice engine costs as separate line items. source
  • 22 Jan 2026. Concurrency Burst introduced: up to the lower of 3x the concurrency limit or 300 additional concurrent calls, at $0.1/minute for burst usage. source
  • 21 Aug 2025. Retell Telnyx phone number call rate adjusted, effective September 1. (was $0.015/min, now $0.020/min) source
  • 16 Jun 2025. The "High Priority" model option renamed Fast Tier for OpenAI models, with a lower price. (was 2x model cost, now 1.5x model cost) source
  • 16 May 2025. Announced for June 1, 2025: prompts over 3,500 tokens scale in cost, and calls with a Dynamic AI First Sentence get a 10-second minimum billable duration. source
  • 31 Dec 2024. Retell Twilio telephony price adjusted, effective January 2025. (was $0.01 per minute, now $0.015 per minute) source

Pages we read

Lexicost has no commercial relationship with any vendor named on this site. Spotted an error? See corrections.

Source for every vendor figure on this page (190)
  1. Retell AI, platform fee per minute: $0.055 per minute (Retell Voice Infra) (Pay as you go. Voice (call) agents; listed as "Retell Voice Infra" under "Conversation Voice Engine" in the Default tab).Retell Voice Infra: $0.055/minute retellai.com/pricing Read 14 Nov 2026.
  2. Retell AI, what that fee includes: The voice engine; not the AI model or phone (Pay as you go).Voice infra: Retell’s conversation voice engine. This is the flat per-minute platform cost of running the real-time call, separate from LLM and telephony costs. docs.retellai.com/accounts/billing Read 14 Nov 2026.
  3. Retell AI, monthly plan fee: No monthly plan fee; pay as you go from $0 (Pay as you go).Most voice AI platforms require annual contracts before you write a single line of code. Retell starts at $0, pay only for what you use. retellai.com/pricing Read 14 Nov 2026.
  4. Retell AI, minimum commitment: No minimum spend (Pay as you go).You pay only for what you consume. No minimums, no contracts, no surprises. retellai.com/pricing Read 14 Nov 2026.
  5. Retell AI, plan: Pay as you go: $0.07-$0.31 per minute for voice agents (Pay as you go).Price: $0.07-$0.31/minute retellai.com/pricing Read 14 Nov 2026.
  6. Retell AI, plan: Enterprise: custom pricing (Enterprise).Price: Custom Pricing retellai.com/pricing Read 14 Nov 2026.
  7. Retell AI, volume discount: Volume pricing on the Enterprise plan; rates not published (Enterprise).Purpose-built for organizations that demand higher reliability, tighter compliance, and dedicated support, with volume pricing that scales as you grow. retellai.com/pricing Read 14 Nov 2026.
  8. Retell AI, minutes included: Not publicly listed. Read 14 Nov 2026.
  9. Retell AI, price per minute beyond the plan: Not publicly listed. Read 14 Nov 2026.
  10. Retell AI, how the AI model is charged: Charged per minute, by model (Pay as you go).LLM: the per-minute cost of the language model your agent uses, which varies by model. docs.retellai.com/accounts/billing Read 14 Nov 2026.
  11. Retell AI, how the AI model is charged: Fast Tier costs more; the increase varies by model (Pay as you go. Fast Tier (and Ultrafast, where offered) chosen per model).The price increase depends on the model and tier; Fast does not use one fixed multiplier across all models. docs.retellai.com/build/llm-options Read 14 Nov 2026.
  12. Retell AI, aI model rate per minute: $0.032 per minute, GPT 6.1 Terra (Pay as you go. Standard column; group: Recommended).GPT 6.1 Terra: $0.032/minute retellai.com/pricing Read 14 Nov 2026.
  13. Retell AI, aI model rate per minute: $0.064 per minute, GPT 6.1 Terra on Fast Tier (Pay as you go. Fast Tier column; group: Recommended).GPT 6.1 Terra, Fast Tier: $0.064/minute retellai.com/pricing Read 14 Nov 2026.
  14. Retell AI, aI model rate per minute: $0.064 per minute, GPT 6 Sol (Pay as you go. Standard column; group: Recommended).GPT 6 Sol: $0.064/minute retellai.com/pricing Read 14 Nov 2026.
  15. Retell AI, aI model rate per minute: $0.128 per minute, GPT 6 Sol on Fast Tier (Pay as you go. Fast Tier column; group: Recommended).GPT 6 Sol, Fast Tier: $0.128/minute retellai.com/pricing Read 14 Nov 2026.
  16. Retell AI, aI model rate per minute: $0.064 per minute, Claude 5.5 Sonnet (Pay as you go. Standard column; group: Recommended).Claude 5.5 Sonnet: $0.064/minute retellai.com/pricing Read 14 Nov 2026.
  17. Retell AI, aI model rate per minute: $0.035 per minute, Tell 1 (Pay as you go. Standard column; group: Retell (Beta)).Tell 1: $0.035/minute retellai.com/pricing Read 14 Nov 2026.
  18. Retell AI, aI model rate per minute: $0.064 per minute, GPT 6.1 Sol (Pay as you go. Standard column; group: OpenAI).GPT 6.1 Sol: $0.064/minute retellai.com/pricing Read 14 Nov 2026.
  19. Retell AI, aI model rate per minute: $0.128 per minute, GPT 6.1 Sol on Fast Tier (Pay as you go. Fast Tier column; group: OpenAI).GPT 6.1 Sol, Fast Tier: $0.128/minute retellai.com/pricing Read 14 Nov 2026.
  20. Retell AI, aI model rate per minute: $0.384 per minute, GPT 6.1 Sol (Ultrafast) (Pay as you go. Listed as its own row, Standard column; group: OpenAI).GPT 6.1 Sol (Ultrafast): $0.384/minute retellai.com/pricing Read 14 Nov 2026.
  21. Retell AI, aI model rate per minute: $0.32 per minute, GPT 6 Astra (Pay as you go. Standard column; group: OpenAI).GPT 6 Astra: $0.32/minute retellai.com/pricing Read 14 Nov 2026.
  22. Retell AI, aI model rate per minute: $0.64 per minute, GPT 6 Astra on Fast Tier (Pay as you go. Fast Tier column; group: OpenAI).GPT 6 Astra, Fast Tier: $0.64/minute retellai.com/pricing Read 14 Nov 2026.
  23. Retell AI, aI model rate per minute: $0.0032 per minute, GPT 6 Luna (Pay as you go. Standard column; group: OpenAI).GPT 6 Luna: $0.0032/minute retellai.com/pricing Read 14 Nov 2026.
  24. Retell AI, aI model rate per minute: $0.0064 per minute, GPT 6 Luna on Fast Tier (Pay as you go. Fast Tier column; group: OpenAI).GPT 6 Luna, Fast Tier: $0.0064/minute retellai.com/pricing Read 14 Nov 2026.
  25. Retell AI, aI model rate per minute: $0.064 per minute, GPT 5.6 Terra (Pay as you go. Standard column; group: OpenAI).GPT 5.6 Terra: $0.064/minute retellai.com/pricing Read 14 Nov 2026.
  26. Retell AI, aI model rate per minute: $0.128 per minute, GPT 5.6 Terra on Fast Tier (Pay as you go. Fast Tier column; group: OpenAI).GPT 5.6 Terra, Fast Tier: $0.128/minute retellai.com/pricing Read 14 Nov 2026.
  27. Retell AI, aI model rate per minute: $0.128 per minute, GPT 5.6 Sol (Pay as you go. Standard column; group: OpenAI (shown after "Show all OpenAI models")).GPT 5.6 Sol: $0.128/minute retellai.com/pricing Read 14 Nov 2026.
  28. Retell AI, aI model rate per minute: $0.256 per minute, GPT 5.6 Sol on Fast Tier (Pay as you go. Fast Tier column; group: OpenAI (shown after "Show all OpenAI models")).GPT 5.6 Sol, Fast Tier: $0.256/minute retellai.com/pricing Read 14 Nov 2026.
  29. Retell AI, aI model rate per minute: $0.0064 per minute, GPT 5.6 Luna (Pay as you go. Standard column; group: OpenAI (shown after "Show all OpenAI models")).GPT 5.6 Luna: $0.0064/minute retellai.com/pricing Read 14 Nov 2026.
  30. Retell AI, aI model rate per minute: $0.0128 per minute, GPT 5.6 Luna on Fast Tier (Pay as you go. Fast Tier column; group: OpenAI (shown after "Show all OpenAI models")).GPT 5.6 Luna, Fast Tier: $0.0128/minute retellai.com/pricing Read 14 Nov 2026.
  31. Retell AI, aI model rate per minute: $0.16 per minute, GPT 5.5 (Pay as you go. Standard column; group: OpenAI (shown after "Show all OpenAI models")).GPT 5.5: $0.16/minute retellai.com/pricing Read 14 Nov 2026.
  32. Retell AI, aI model rate per minute: $0.32 per minute, GPT 5.5 on Fast Tier (Pay as you go. Fast Tier column; group: OpenAI (shown after "Show all OpenAI models")).GPT 5.5, Fast Tier: $0.32/minute retellai.com/pricing Read 14 Nov 2026.
  33. Retell AI, aI model rate per minute: $0.08 per minute, GPT 5.4 (Pay as you go. Standard column; group: OpenAI (shown after "Show all OpenAI models")).GPT 5.4: $0.080/minute retellai.com/pricing Read 14 Nov 2026.
  34. Retell AI, aI model rate per minute: $0.16 per minute, GPT 5.4 on Fast Tier (Pay as you go. Fast Tier column; group: OpenAI (shown after "Show all OpenAI models")).GPT 5.4, Fast Tier: $0.16/minute retellai.com/pricing Read 14 Nov 2026.
  35. Retell AI, aI model rate per minute: $0.024 per minute, GPT 5.4 mini (Pay as you go. Standard column; group: OpenAI (shown after "Show all OpenAI models")).GPT 5.4 mini: $0.024/minute retellai.com/pricing Read 14 Nov 2026.
  36. Retell AI, aI model rate per minute: $0.048 per minute, GPT 5.4 mini on Fast Tier (Pay as you go. Fast Tier column; group: OpenAI (shown after "Show all OpenAI models")).GPT 5.4 mini, Fast Tier: $0.048/minute retellai.com/pricing Read 14 Nov 2026.
  37. Retell AI, aI model rate per minute: $0.0064 per minute, GPT 5.4 nano (Pay as you go. Standard column; group: OpenAI (shown after "Show all OpenAI models")).GPT 5.4 nano: $0.0064/minute retellai.com/pricing Read 14 Nov 2026.
  38. Retell AI, aI model rate per minute: $0.056 per minute, GPT 5.2 (Pay as you go. Standard column; group: OpenAI (shown after "Show all OpenAI models")).GPT 5.2: $0.056/minute retellai.com/pricing Read 14 Nov 2026.
  39. Retell AI, aI model rate per minute: $0.112 per minute, GPT 5.2 on Fast Tier (Pay as you go. Fast Tier column; group: OpenAI (shown after "Show all OpenAI models")).GPT 5.2, Fast Tier: $0.112/minute retellai.com/pricing Read 14 Nov 2026.
  40. Retell AI, aI model rate per minute: $0.04 per minute, GPT 5.1 (Pay as you go. Standard column; group: OpenAI (shown after "Show all OpenAI models")).GPT 5.1: $0.04/minute retellai.com/pricing Read 14 Nov 2026.
  41. Retell AI, aI model rate per minute: $0.08 per minute, GPT 5.1 on Fast Tier (Pay as you go. Fast Tier column; group: OpenAI (shown after "Show all OpenAI models")).GPT 5.1, Fast Tier: $0.08/minute retellai.com/pricing Read 14 Nov 2026.
  42. Retell AI, aI model rate per minute: $0.04 per minute, GPT 5 (Pay as you go. Standard column; group: OpenAI (shown after "Show all OpenAI models")).GPT 5: $0.04/minute retellai.com/pricing Read 14 Nov 2026.
  43. Retell AI, aI model rate per minute: $0.08 per minute, GPT 5 on Fast Tier (Pay as you go. Fast Tier column; group: OpenAI (shown after "Show all OpenAI models")).GPT 5, Fast Tier: $0.08/minute retellai.com/pricing Read 14 Nov 2026.
  44. Retell AI, aI model rate per minute: $0.008 per minute, GPT 5 mini (Pay as you go. Standard column; group: OpenAI (shown after "Show all OpenAI models")).GPT 5 mini: $0.008/minute retellai.com/pricing Read 14 Nov 2026.
  45. Retell AI, aI model rate per minute: $0.016 per minute, GPT 5 mini on Fast Tier (Pay as you go. Fast Tier column; group: OpenAI (shown after "Show all OpenAI models")).GPT 5 mini, Fast Tier: $0.016/minute retellai.com/pricing Read 14 Nov 2026.
  46. Retell AI, aI model rate per minute: $0.0016 per minute, GPT 5 nano (Pay as you go. Standard column; group: OpenAI (shown after "Show all OpenAI models")).GPT 5 nano: $0.0016/minute retellai.com/pricing Read 14 Nov 2026.
  47. Retell AI, aI model rate per minute: $0.045 per minute, GPT 4.1 (Pay as you go. Standard column; group: OpenAI (shown after "Show all OpenAI models")).GPT 4.1: $0.045/minute retellai.com/pricing Read 14 Nov 2026.
  48. Retell AI, aI model rate per minute: $0.0675 per minute, GPT 4.1 on Fast Tier (Pay as you go. Fast Tier column; group: OpenAI (shown after "Show all OpenAI models")).GPT 4.1, Fast Tier: $0.0675/minute retellai.com/pricing Read 14 Nov 2026.
  49. Retell AI, aI model rate per minute: $0.0128 per minute, GPT 4.1 mini (Pay as you go. Standard column; group: OpenAI (shown after "Show all OpenAI models")).GPT 4.1 mini: $0.0128/minute retellai.com/pricing Read 14 Nov 2026.
  50. Retell AI, aI model rate per minute: $0.0192 per minute, GPT 4.1 mini on Fast Tier (Pay as you go. Fast Tier column; group: OpenAI (shown after "Show all OpenAI models")).GPT 4.1 mini, Fast Tier: $0.0192/minute retellai.com/pricing Read 14 Nov 2026.
  51. Retell AI, aI model rate per minute: $0.0032 per minute, GPT 4.1 nano (Pay as you go. Standard column; group: OpenAI (shown after "Show all OpenAI models")).GPT 4.1 nano: $0.0032/minute retellai.com/pricing Read 14 Nov 2026.
  52. Retell AI, aI model rate per minute: $0.0048 per minute, GPT 4.1 nano on Fast Tier (Pay as you go. Fast Tier column; group: OpenAI (shown after "Show all OpenAI models")).GPT 4.1 nano, Fast Tier: $0.0048/minute retellai.com/pricing Read 14 Nov 2026.
  53. Retell AI, aI model rate per minute: $0.128 per minute, Claude 5.5 Opus (Pay as you go. Standard column; group: Anthropic).Claude 5.5 Opus: $0.128/minute retellai.com/pricing Read 14 Nov 2026.
  54. Retell AI, aI model rate per minute: $0.0032 per minute, Claude 5.5 Haiku (Pay as you go. Standard column; group: Anthropic).Claude 5.5 Haiku: $0.0032/minute retellai.com/pricing Read 14 Nov 2026.
  55. Retell AI, aI model rate per minute: $0.064 per minute, Claude 5 Sonnet (Pay as you go. Standard column; group: Anthropic).Claude 5 Sonnet: $0.064/minute retellai.com/pricing Read 14 Nov 2026.
  56. Retell AI, aI model rate per minute: $0.16 per minute, Claude 5 Opus (Pay as you go. Standard column; group: Anthropic).Claude 5 Opus: $0.16/minute retellai.com/pricing Read 14 Nov 2026.
  57. Retell AI, aI model rate per minute: $0.08 per minute, Claude 4.6 sonnet (Pay as you go. Standard column; group: Anthropic (shown after "Show all Anthropic models")).Claude 4.6 sonnet: $0.08/minute retellai.com/pricing Read 14 Nov 2026.
  58. Retell AI, aI model rate per minute: $0.025 per minute, Claude 4.5 haiku (Pay as you go. Standard column; group: Anthropic (shown after "Show all Anthropic models")).Claude 4.5 haiku: $0.025/minute retellai.com/pricing Read 14 Nov 2026.
  59. Retell AI, aI model rate per minute: $0.08 per minute, Claude 4.5 sonnet (Pay as you go. Standard column; group: Anthropic (shown after "Show all Anthropic models")).Claude 4.5 sonnet: $0.08/minute retellai.com/pricing Read 14 Nov 2026.
  60. Retell AI, aI model rate per minute: $0.128 per minute, Gemini 4 Carbon (Pay as you go. Standard column; group: Google).Gemini 4 Carbon: $0.128/minute retellai.com/pricing Read 14 Nov 2026.
  61. Retell AI, aI model rate per minute: $0.128 per minute, Gemini 4 Argon (Pay as you go. Standard column; group: Google).Gemini 4 Argon: $0.128/minute retellai.com/pricing Read 14 Nov 2026.
  62. Retell AI, aI model rate per minute: $0.048 per minute, Gemini 3.8 Flash (Pay as you go. Standard column; group: Google).Gemini 3.8 Flash: $0.048/minute retellai.com/pricing Read 14 Nov 2026.
  63. Retell AI, aI model rate per minute: $0.048 per minute, Gemini 3.7 Flash (Pay as you go. Standard column; group: Google).Gemini 3.7 Flash: $0.048/minute retellai.com/pricing Read 14 Nov 2026.
  64. Retell AI, aI model rate per minute: $0.024 per minute, Gemini 3.6 Flash (Pay as you go. Standard column; group: Google (shown after "Show all Google models")).Gemini 3.6 Flash: $0.024/minute retellai.com/pricing Read 14 Nov 2026.
  65. Retell AI, aI model rate per minute: $0.0096 per minute, Gemini 3.5 Flash Lite (Pay as you go. Standard column; group: Google (shown after "Show all Google models")).Gemini 3.5 Flash Lite: $0.0096/minute retellai.com/pricing Read 14 Nov 2026.
  66. Retell AI, aI model rate per minute: $0.048 per minute, Gemini 3.5 Flash (Pay as you go. Standard column; group: Google (shown after "Show all Google models")).Gemini 3.5 Flash: $0.048/minute retellai.com/pricing Read 14 Nov 2026.
  67. Retell AI, aI model rate per minute: $0.008 per minute, Gemini 3.1 Flash Lite (Pay as you go. Standard column; group: Google (shown after "Show all Google models")).Gemini 3.1 Flash Lite: $0.008/minute retellai.com/pricing Read 14 Nov 2026.
  68. Retell AI, aI model rate per minute: $0.016 per minute, Gemini 3.0 Flash (Pay as you go. Standard column; group: Google (shown after "Show all Google models")).Gemini 3.0 Flash: $0.016/minute retellai.com/pricing Read 14 Nov 2026.
  69. Retell AI, aI model rate per million tokens: Not publicly listed. Read 14 Nov 2026.
  70. Retell AI, voice (text-to-speech) rate: $0.015 per minute, Retell Platform Voices (Pay as you go).Retell Platform Voices: $0.015/minute retellai.com/pricing Read 14 Nov 2026.
  71. Retell AI, voice (text-to-speech) rate: $0.015 per minute, Minimax Voices (Pay as you go).Minimax Voices: $0.015/minute retellai.com/pricing Read 14 Nov 2026.
  72. Retell AI, voice (text-to-speech) rate: $0.015 per minute, Fish Voices (Pay as you go).Fish Voices: $0.015/minute retellai.com/pricing Read 14 Nov 2026.
  73. Retell AI, voice (text-to-speech) rate: $0.04 per minute, ElevenLabs Flash (Pay as you go).ElevenLabs Flash: $0.040/minute retellai.com/pricing Read 14 Nov 2026.
  74. Retell AI, voice (text-to-speech) rate: $0.06 per minute, ElevenLabs Multilingual v2 (Pay as you go).ElevenLabs Multilingual v2: $0.06/minute retellai.com/pricing Read 14 Nov 2026.
  75. Retell AI, voice (text-to-speech) rate: $0.10 per minute, ElevenLabs v3 (Pay as you go).ElevenLabs v3: $0.10/minute retellai.com/pricing Read 14 Nov 2026.
  76. Retell AI, voice (text-to-speech) rate: $0.08 per minute, ElevenLabs v3 Conversational (Pay as you go).ElevenLabs v3 Conversational: $0.08/minute retellai.com/pricing Read 14 Nov 2026.
  77. Retell AI, voice (text-to-speech) rate: $0.10 per minute, ElevenLabs v4 (Pay as you go).ElevenLabs v4: $0.10/minute retellai.com/pricing Read 14 Nov 2026.
  78. Retell AI, voice (text-to-speech) rate: $0.08 per minute, ElevenLabs v4 Turbo (Pay as you go).ElevenLabs v4 Turbo: $0.08/minute retellai.com/pricing Read 14 Nov 2026.
  79. Retell AI, voice (text-to-speech) rate: $0.015 per minute, Cartesia Voices (Pay as you go).Cartesia Voices: $0.015/minute retellai.com/pricing Read 14 Nov 2026.
  80. Retell AI, voice (text-to-speech) rate: $0.015 per minute, OpenAI Voices (Pay as you go).OpenAI Voices: $0.015/minute retellai.com/pricing Read 14 Nov 2026.
  81. Retell AI, voice (text-to-speech) rate: $0.015 per minute, Inworld Voices (Pay as you go).Inworld Voices: $0.015/minute retellai.com/pricing Read 14 Nov 2026.
  82. Retell AI, speech-to-text rate: Not publicly listed. Read 14 Nov 2026.
  83. Retell AI, realtime speech model rate: $0.345 per minute, GPT Realtime 1.5 (Pay as you go. Speech-to-speech LLM).GPT Realtime 1.5: $0.345/minute retellai.com/pricing Read 14 Nov 2026.
  84. Retell AI, realtime speech model rate: $0.345 per minute, GPT Realtime (Pay as you go. Speech-to-speech LLM).GPT Realtime: $0.345/minute retellai.com/pricing Read 14 Nov 2026.
  85. Retell AI, realtime speech model rate: $0.07 per minute, GPT Realtime mini (Pay as you go. Speech-to-speech LLM).GPT Realtime mini: $0.07/minute retellai.com/pricing Read 14 Nov 2026.
  86. Retell AI, realtime speech model rate: $0.38 per minute, GPT Realtime 2.1 (Pay as you go. Speech-to-speech LLM).GPT Realtime 2.1: $0.38/minute retellai.com/pricing Read 14 Nov 2026.
  87. Retell AI, realtime speech model rate: $0.38 per minute, GPT Realtime 2 (Pay as you go. Speech-to-speech LLM).GPT Realtime 2: $0.38/minute retellai.com/pricing Read 14 Nov 2026.
  88. Retell AI, realtime speech model rate: $0.07 per minute, GPT Realtime 2.1 mini (Pay as you go. Speech-to-speech LLM).GPT Realtime 2.1 mini: $0.07/minute retellai.com/pricing Read 14 Nov 2026.
  89. Retell AI, realtime speech model rate: $0.135 per minute, Grok Voice 3.0 (Pay as you go. Speech-to-speech LLM).Grok Voice 3.0: $0.135/minute retellai.com/pricing Read 14 Nov 2026.
  90. Retell AI, realtime speech model rate: $0.05 per minute, GPT-Live 1, plus the backend model rate (Pay as you go. Speech-to-speech LLM).GPT-Live 1: + backend LLM price per minute, $0.05/minute retellai.com/pricing Read 14 Nov 2026.
  91. Retell AI, uS phone minutes: $0.015 per minute (Retell Twilio number) (Pay as you go. United States. Retell-provided Twilio number, not toll-free).United States (Twilio): $0.015/min retellai.com/pricing Read 14 Nov 2026.
  92. Retell AI, uS phone minutes: $0.03 per minute (Retell Telnyx number) (Pay as you go. United States. Retell-provided Telnyx number).United States (Telnyx): $0.03/min retellai.com/pricing Read 14 Nov 2026.
  93. Retell AI, other phone rates: $0.06 per minute, United States, toll-free (Twilio) (Pay as you go. United States, toll-free. Retell-provided Twilio number).United States (Twilio Toll Free): $0.06/min retellai.com/pricing Read 14 Nov 2026.
  94. Retell AI, other phone rates: $0.15 per minute, India (Twilio) (Pay as you go. India. Retell-provided Twilio number).India (Twilio): $0.15/min retellai.com/pricing Read 14 Nov 2026.
  95. Retell AI, other phone rates: $0.10 per minute, Australia (Twilio) (Pay as you go. Australia. Retell-provided Twilio number).Australia (Twilio): $0.1/min retellai.com/pricing Read 14 Nov 2026.
  96. Retell AI, other phone rates: $0.10 per minute, Germany (Twilio) (Pay as you go. Germany. Retell-provided Twilio number).Germany (Twilio): $0.1/min retellai.com/pricing Read 14 Nov 2026.
  97. Retell AI, other phone rates: $0.10 per minute, Spain (Twilio) (Pay as you go. Spain. Retell-provided Twilio number).Spain (Twilio): $0.1/min retellai.com/pricing Read 14 Nov 2026.
  98. Retell AI, other phone rates: $0.10 per minute, United Kingdom (Twilio) (Pay as you go. United Kingdom. Retell-provided Twilio number).United Kingdom (Twilio): $0.1/min retellai.com/pricing Read 14 Nov 2026.
  99. Retell AI, other phone rates: $0.05 per minute, Mexico (Twilio) (Pay as you go. Mexico. Retell-provided Twilio number).Mexico (Twilio): $0.05/min retellai.com/pricing Read 14 Nov 2026.
  100. Retell AI, other phone rates: $0.06 per minute, France (Twilio) (Pay as you go. France. Retell-provided Twilio number).France (Twilio): $0.06/min retellai.com/pricing Read 14 Nov 2026.
  101. Retell AI, other phone rates: $0.28 per minute, Japan (Twilio) (Pay as you go. Japan. Retell-provided Twilio number).Japan (Twilio): $0.28/min retellai.com/pricing Read 14 Nov 2026.
  102. Retell AI, other phone rates: $0.03 per minute, Canada (Twilio) (Pay as you go. Canada. Retell-provided Twilio number).Canada (Twilio): $0.03/min retellai.com/pricing Read 14 Nov 2026.
  103. Retell AI, other phone rates: $0.06 per minute, Italy (Twilio) (Pay as you go. Italy. Retell-provided Twilio number).Italy (Twilio): $0.06/min retellai.com/pricing Read 14 Nov 2026.
  104. Retell AI, other phone rates: $0.40 per minute, Indonesia (Twilio) (Pay as you go. Indonesia. Retell-provided Twilio number).Indonesia (Twilio): $0.4/min retellai.com/pricing Read 14 Nov 2026.
  105. Retell AI, other phone rates: $0.80 per minute, Philippines (Twilio) (Pay as you go. Philippines. Retell-provided Twilio number).Philippines (Twilio): $0.8/min retellai.com/pricing Read 14 Nov 2026.
  106. Retell AI, other phone rates: $0.20 per minute, Malaysia (Twilio) (Pay as you go. Malaysia. Retell-provided Twilio number).Malaysia (Twilio): $0.2/min retellai.com/pricing Read 14 Nov 2026.
  107. Retell AI, other phone rates: $0.45 per minute, Thailand (Twilio) (Pay as you go. Thailand. Retell-provided Twilio number).Thailand (Twilio): $0.45/min retellai.com/pricing Read 14 Nov 2026.
  108. Retell AI, other phone rates: $0.25 per minute, India (Telnyx) (Pay as you go. India. Retell-provided Telnyx number).India(Telnyx): $0.25/min retellai.com/pricing Read 14 Nov 2026.
  109. Retell AI, other phone rates: $0.03 per minute, Canada (Telnyx) (Pay as you go. Canada. Retell-provided Telnyx number).Canada(Telnyx): $0.03/min retellai.com/pricing Read 14 Nov 2026.
  110. Retell AI, other phone rates: No Retell charge for SIP trunking or custom telephony (Pay as you go. Your own carrier via SIP).No Charge for Sip Trunking/Custom Telephony retellai.com/pricing Read 14 Nov 2026.
  111. Retell AI, phone number, per month: $2 per month per Retell phone number (Pay as you go. Retell-provided number; no charge for custom phone numbers).Retell Phone Numbers: $2.00/month retellai.com/pricing Read 14 Nov 2026.
  112. Retell AI, phone number, per month: $5 per month per US toll-free number (United States. Toll-free number bought through Retell from Twilio or Bandwidth).US toll-free numbers: $5/month docs.retellai.com/deploy/purchase-number Read 14 Nov 2026.
  113. Retell AI, add-on fee: Knowledge base: +$0.005 per minute (Pay as you go. Calls using a knowledge base).Knowledge Base: +$0.005/minute retellai.com/pricing Read 14 Nov 2026.
  114. Retell AI, add-on fee: Branded call: +$0.10 per outbound call (Pay as you go).Branded Call: +$0.10/outbound call retellai.com/pricing Read 14 Nov 2026.
  115. Retell AI, add-on fee: Advanced denoising: +$0.005 per minute (Pay as you go).Advanced Denoising: +$0.005/min retellai.com/pricing Read 14 Nov 2026.
  116. Retell AI, add-on fee: Safety guardrails: +$0.005 per minute (Pay as you go).Safety Guardrails: +$0.005/min retellai.com/pricing Read 14 Nov 2026.
  117. Retell AI, add-on fee: PII removal: +$0.01 per minute (Pay as you go).PII Removal: +$0.01/min retellai.com/pricing Read 14 Nov 2026.
  118. Retell AI, add-on fee: AI quality assurance: first 100 minutes free, then $0.10 per minute (Pay as you go).AI Quality Assurance: First 100 minutes free, $0.10/min retellai.com/pricing Read 14 Nov 2026.
  119. Retell AI, add-on fee: SMS: $0.01 per message (Pay as you go).SMS: $0.01/Msg retellai.com/pricing Read 14 Nov 2026.
  120. Retell AI, add-on fee: Knowledge base: $8 per month each after 10 free ($80/month free value) (Pay as you go. Monthly subscription item).Knowledge Base: $80/month free value (10 KBs), $8.00/Knowledge Base/month (prorated) retellai.com/pricing Read 14 Nov 2026.
  121. Retell AI, add-on fee: Retell SMS: $20 per month (Pay as you go. Monthly subscription item; no charge for custom telephony SMS).Retell SMS: $20.00/month retellai.com/pricing Read 14 Nov 2026.
  122. Retell AI, add-on fee: Dedicated stable server: Enterprise add-on, price not published (Enterprise).Dedicated Stable Server (add-on) retellai.com/pricing Read 14 Nov 2026.
  123. Retell AI, add-on fee: Dedicated implementation support: Enterprise add-on, price not published (Enterprise).Dedicated Implementation Support (add-on) retellai.com/pricing Read 14 Nov 2026.
  124. Retell AI, add-on fee: Conversation Memory: $0.005 per saving or backfill run (Conversation Memory feature).Privacy and pricing: Memory follows your storage and PII redaction settings. Saving and backfilling cost $0.005 per run. retellai.com/changelog Read 14 Nov 2026.
  125. Retell AI, add-on fee: Verified phone number: $10 a month; one tab also shows a one-time $10 fee (Pay as you go).Verified Phone Number: $10.00/Phone number/month Also: Verified Phone Number: One-time $10 fee retellai.com/pricing retellai.com/pricing Read 14 Nov 2026.
  126. Retell AI, where the vendor's own pages disagree: The pricing page says "No platform fees", while the billing docs call the $0.055 per minute Voice Infra charge, which the same pricing page lists, "the flat per-minute platform cost"..No platform fees, no feature gating. Every plan gets full access to the entire platform. Also: Voice infra: Retell’s conversation voice engine. This is the flat per-minute platform cost of running the real-time call, separate from LLM and telephony costs. docs.retellai.com/accounts/billing retellai.com/pricing Read 14 Nov 2026.
  127. Retell AI, where the vendor's own pages disagree: The Default tab of the pricing page lists the verified phone number at $10.00 per number per month; the Speech-to-Speech tab shows $10.00 per number per month in its Notes column and "One-time $10 fee" in its Pricing column..Verified Phone Number: $10.00/Phone number/month Also: Verified Phone Number: One-time $10 fee retellai.com/pricing retellai.com/pricing Read 14 Nov 2026.
  128. Retell AI, how a minute is billed: Per second; no rounding up per call (Pay as you go. Seconds are totalled over the billing cycle and charged as accumulated minutes).Each call is tracked to the nearest second. At the end of each billing cycle, we charge based on your total accumulated minutes. No rounding up per call, no inflated bills. retellai.com/pricing Read 14 Nov 2026.
  129. Retell AI, minimum billed per call: 10 seconds, for calls with a dynamic opening message that end in under 10 seconds (Agent speaks first with a dynamic opening message and the call ends in under 10 seconds).Your agent speaks first with a dynamic opening message and the call ends in under 10 seconds. We bill 10 seconds. retellai.com/pricing Read 14 Nov 2026.
  130. Retell AI, fee per call attempt: $0.005 per dial for batch calls (Pay as you go. Batch Call).Batch Call: +$0.005/dial retellai.com/pricing Read 14 Nov 2026.
  131. Retell AI, billing rule: Prompts over 4,000 tokens: billed time grows in proportion (Pay as you go).Your agent's average prompt is over 4,000 tokens. Billed time grows in proportion: a 4,800-token prompt is 20% over, so the call bills 20% more time. retellai.com/pricing Read 14 Nov 2026.
  132. Retell AI, billing rule: Silence and hold time are billed (Pay as you go).Yes. Billing covers the entire duration of the call because the speech-to-text engine remains active and listening throughout, even during silence. retellai.com/pricing Read 14 Nov 2026.
  133. Retell AI, billing rule: After a transfer, only the phone fee continues (Pay as you go).Once the call is transferred, the AI voice agent fee stops. Only the telephony fee continues for the remainder of the transferred call. retellai.com/pricing Read 14 Nov 2026.
  134. Retell AI, billing rule: Agentic warm transfer: both agents are billed while each is active.Agentic warm transfer: The original agent and transfer agent are billed as separate calls while each is active, so their charges can overlap. After the handoff, remaining telephony charges are added to the original call. docs.retellai.com/accounts/billing Read 14 Nov 2026.
  135. Retell AI, billing rule: Fast fallback can bill both models, even when one reply is used.Fast fallback can incur charges for both models, including when only one response is used. docs.retellai.com/build/llm-options Read 14 Nov 2026.
  136. Retell AI, billing rule: Failed calls are not billed; voicemail is billed while the agent is active (Pay as you go).You are only charged for connected calls. If a call fails to connect, you won't be billed. For calls that reach voicemail, billing applies only for the duration the AI agent is active on the line. retellai.com/pricing Read 14 Nov 2026.
  137. Retell AI, billing rule: Burst calls above the concurrency limit: +$0.10 per minute for the whole call (Pay as you go).Burst calls: Calls that exceed your normal limit but stay within the burst limit proceed with an added $0.10/min surcharge applied to the entire call duration. docs.retellai.com/deploy/concurrency Read 14 Nov 2026.
  138. Retell AI, billing rule: Usage is paid from a prepaid credit balance (Pay as you go).Usage costs — calls, chat, and other metered usage — are deducted from your credit balance in real time. docs.retellai.com/accounts/billing Read 14 Nov 2026.
  139. Retell AI, billing rule: Credits do not expire and are non-refundable (Pay as you go).Credits never expire, but they are non-refundable once purchased. docs.retellai.com/accounts/billing Read 14 Nov 2026.
  140. Retell AI, billing rule: Testing is billed at production rates (Pay as you go).Testing an agent bills at the same rates as production. There’s no separate test tier and no free testing sandbox, so a message or a minute spent testing costs what it would on a live call. docs.retellai.com/test/testing-pricing Read 14 Nov 2026.
  141. Retell AI, billing rule: Rates can change by posting on the pricing page; new rates apply from the next billing cycle.Retell AI may change the rates at any time by posting such change at https://www.retellai.com/pricing. The new rate will apply to your next billing cycle, as the case may be after the new rates have been published. retellai.com/legal/terms-of-service Read 14 Nov 2026.
  142. Retell AI, billing rule: Late payment fee: the lesser of 10% of the past-due amount or the legal maximum.You agree that for amounts not paid by the due date, we may charge, and you agree to pay, a late payment fee equal to the lesser of 10% of the past due amounts or the maximum allowed by law. retellai.com/legal/terms-of-service Read 14 Nov 2026.
  143. Retell AI, billing rule: Purchased concurrency: billed at the end of the month (billing docs) or when added (changelog) (Pay as you go. Concurrency bought beyond the 20 included calls).Phone numbers, knowledge bases beyond the free tier, calls per second (CPS), and purchased concurrency stay on your card and are billed at the end of the month. Also: Concurrency is now charged when you add it, not at the end of the month. Add capacity mid-cycle and pay only for the remaining days. retellai.com/changelog docs.retellai.com/accounts/billing Read 14 Nov 2026.
  144. Retell AI, where the vendor's own pages disagree: The billing docs say purchased concurrency is billed at the end of the month, while the February 10, 2026 changelog entry says concurrency is charged when you add it, not at the end of the month..Phone numbers, knowledge bases beyond the free tier, calls per second (CPS), and purchased concurrency stay on your card and are billed at the end of the month. Also: Concurrency is now charged when you add it, not at the end of the month. Add capacity mid-cycle and pay only for the remaining days. retellai.com/changelog docs.retellai.com/accounts/billing Read 14 Nov 2026.
  145. Retell AI, calls at once, included: 20 calls at once included (Pay as you go).Every account includes 20 concurrent calls for free. retellai.com/pricing Read 14 Nov 2026.
  146. Retell AI, calls at once, included: Enterprise: "No Cap", "High Cap" or 50+ (Enterprise).Concurrent calls: No Cap on Concurrent Calls Also: High Cap on Concurrent Calls retellai.com/pricing Also: Enterprise plans offer custom concurrency starting at 50+ calls. retellai.com/pricing retellai.com/pricing Read 14 Nov 2026.
  147. Retell AI, where the vendor's own pages disagree: The pricing page comparison table says the Enterprise plan has "No Cap on Concurrent Calls", while the Enterprise plan card on the same page says "High Cap on Concurrent Calls" and the FAQ says custom concurrency "starting at 50+ calls"..Concurrent calls: No Cap on Concurrent Calls Also: High Cap on Concurrent Calls retellai.com/pricing Also: Enterprise plans offer custom concurrency starting at 50+ calls. retellai.com/pricing retellai.com/pricing Read 14 Nov 2026.
  148. Retell AI, each extra call at once: $8 per extra concurrent call per month (Pay as you go. monthly. Beyond the 20 included concurrent calls).Additional capacity is $8 per concurrent call per month. retellai.com/pricing Read 14 Nov 2026.
  149. Retell AI, when you exceed the limit: Outbound calls over the limit are rejected unless burst is on; batch and dialer calls wait.It’s rejected, unless concurrency burst is enabled. With burst on, the call proceeds within your burst limit and the $0.10/min surcharge applies to its entire duration. Batch calls and Dialer campaign calls are the exception: they never use burst, and they wait for a free slot instead. docs.retellai.com/deploy/concurrency Read 14 Nov 2026.
  150. Retell AI, when you exceed the limit: Inbound calls over the limit wait briefly for a free slot.When inbound call traffic reaches your concurrency limit, Retell briefly keeps new inbound calls waiting for an available slot. If a slot opens, the inbound call proceeds. docs.retellai.com/deploy/concurrency Read 14 Nov 2026.
  151. Retell AI, burst above the limit: Burst up to the lower of 3 times your limit or your limit plus 300.Your burst limit is calculated as the lower of: 3× your concurrency limit, OR Your concurrency limit + 300 docs.retellai.com/deploy/concurrency Read 14 Nov 2026.
  152. Retell AI, other limits: Calls end after 1 hour by default; up to 2 hours in settings.The maximum duration of a call is 1 hour by default, and the call will end automatically after 1 hour. You can increase this up to 2 hours in your agent settings. docs.retellai.com/deploy/concurrency Read 14 Nov 2026.
  153. Retell AI, other limits: Prompts up to 32,768 tokens by default.The maximum prompt length when using the Retell LLM framework is 32768 tokens by default, and longer prompts are rejected when creating or updating the LLM. docs.retellai.com/deploy/concurrency Read 14 Nov 2026.
  154. Retell AI, other limits: Retell sells US and Canada numbers; calls to 15 countries.Currently we only support purchase of US and Canada numbers and support making calls to 15 countries. docs.retellai.com/deploy/purchase-number Read 14 Nov 2026.
  155. Retell AI, other limits: Some new numbers have a 2-minute hold on outbound calls.Some newly purchased numbers have a 2-minute hold on outbound calls (as of November 2026). This hold does not block inbound calls. docs.retellai.com/deploy/purchase-number Read 14 Nov 2026.
  156. Retell AI, free credit or trial: $10 in free credits (Pay as you go).Go live in minutes with $10 in free credits. Full platform access, no commitments. Just build, test, and pay as you scale. retellai.com/pricing Read 14 Nov 2026.
  157. Retell AI, sign up without sales: Yes: sign up and go live in minutes (Pay as you go).Go from signup to live agent in minutes. Pre-built templates and simulation testing get you to production fast. retellai.com/pricing Read 14 Nov 2026.
  158. Retell AI, hIPAA agreement (BAA): Yes, self-signed online (The compliance page names no plan; the pricing page comparison table shows a check mark for "HIPAA / BAA" under both Pay-as-you-go and Enterprise).Retell’s Business Associate Agreement (BAA) and Data Processing Addendum (DPA, including EU Standard Contractual Clauses) are available for self-signing at click-agreements.retellai.com. docs.retellai.com/general/compliance Read 14 Nov 2026.
  159. Retell AI, hIPAA agreement (BAA): No fee to sign the BAA.There is no additional fee to sign these agreements. docs.retellai.com/general/compliance Read 14 Nov 2026.
  160. Retell AI, hIPAA agreement (BAA): Terms: Retell is not a business associate unless a BAA is agreed.Unless otherwise expressly agreed in writing, Retell AI does not act as a “Business Associate” as defined under HIPAA and disclaims any such obligations, and you will not use the Services to process HIPAA regulated personal health information unless we have expressly agreed to enter into a business associate agreement with you. retellai.com/legal/terms-of-service Read 14 Nov 2026.
  161. Retell AI, sOC 2: SOC 2 Type 1 and Type 2.SOC 2 Type 1 and Type 2 — independently audited controls for security, availability, and confidentiality. docs.retellai.com/general/compliance Read 14 Nov 2026.
  162. Retell AI, other compliance statements: HIPAA compliant; a signed BAA is required before sending health data.HIPAA — compliant for handling protected health information (PHI). A signed BAA is required before transmitting PHI through Retell. docs.retellai.com/general/compliance Read 14 Nov 2026.
  163. Retell AI, other compliance statements: GDPR compliant via AWS, with a DPA.GDPR — compliant via AWS infrastructure with a GDPR-compliant Data Processing Addendum. docs.retellai.com/general/compliance Read 14 Nov 2026.
  164. Retell AI, other compliance statements: Enterprise customers with an MSA: data not used to train models (Enterprise. Customers with a Master Services Agreement).If you’re an enterprise customer with a Master Services Agreement (MSA), Retell doesn’t use your data to train models. docs.retellai.com/general/compliance Read 14 Nov 2026.
  165. Retell AI, other compliance statements: Zero data retention agreements with model, speech and voice providers.Retell has Zero Data Retention (ZDR) agreements with its LLM, speech recognition, and text-to-speech subprocessors, so these providers don’t retain your call data after they process it. docs.retellai.com/general/compliance Read 14 Nov 2026.
  166. Retell AI, other compliance statements: ISO 27001:2022 certificate listed in the Trust Center.ISO 27001:2022 Certificate Of Registration trust.retellai.com Read 14 Nov 2026.
  167. Retell AI, other compliance statements: GDPR and CCPA attestation letter listed in the Trust Center.GDPR and CCPA Attestation Letter trust.retellai.com Read 14 Nov 2026.
  168. Retell AI, where data is processed: Runs on AWS; services are not operated within the EU.Yes. Retell complies with the General Data Protection Regulation (GDPR) by utilizing Amazon Web Services (AWS), which includes a GDPR-compliant Data Processing Addendum (DPA) in its Service Terms. However, please note that we do not currently operate services within the European Union. docs.retellai.com/general/compliance Read 14 Nov 2026.
  169. Retell AI, latency the vendor states: About 600 ms response time.Retell AI voice agents respond in about 600 milliseconds, so conversations keep their natural rhythm. retellai.com Read 14 Nov 2026.
  170. Retell AI, bring your own model, voice or carrier: Bring your own AI model (custom LLM over WebSocket).With a custom LLM, you own response generation. Retell handles the call itself (telephony, transcription, turn-taking, speech synthesis) and opens a WebSocket to your server for each call. docs.retellai.com/integrate-llm/overview Read 14 Nov 2026.
  171. Retell AI, bring your own model, voice or carrier: Bring your own carrier and numbers via SIP.This guide shows how to integrate Retell agents with your telephony provider and use your own numbers. docs.retellai.com/deploy/custom-telephony Read 14 Nov 2026.
  172. Retell AI, white label for agencies: Website widget: Retell branding can be hidden with a token from support (Website widget (floating and embedded)).Contact Retell support for a white-label token, then add it to the widget as data-white-label. It works for both the floating and embedded widget, in every mode. docs.retellai.com/deploy/chat-widget Read 14 Nov 2026.
  173. Retell AI, uptime commitment: 99.5% uptime target, commercially reasonable efforts.Retell AI shall use commercially reasonable efforts to maintain at least 99.5% uptime for the Services, excluding scheduled maintenance windows (not to exceed six (6) hours per month) and events of force majeure. retellai.com/legal/terms-of-service Read 14 Nov 2026.
  174. Retell AI, support by plan: Pay as you go: community and email support (Pay as you go).Community and Email Support retellai.com/pricing Read 14 Nov 2026.
  175. Retell AI, support by plan: Enterprise: 24/7 support with a dedicated portal (Enterprise).24/7 Omnichannel Support with Dedicated Portal retellai.com/pricing Read 14 Nov 2026.
  176. Retell AI, turn-taking setting: responsiveness: how responsive the agent is, 0 to 1; lower waits more before it responds; default 1 (Range 0 to 1 (API field on the voice agent)).Controls how responsive is the agent. Value ranging from [0,1]. Lower value means less responsive agent (wait more, respond slower), while higher value means faster exchanges (respond when it can). If unset, default value 1 will apply. docs.retellai.com/api-references/create-agent Read 14 Nov 2026.
  177. Retell AI, turn-taking setting: Response Wait time: the agent's wait after the caller stops speaking; none by default, up to 5.5 seconds (Dashboard Speech settings; from no added wait up to 5.5 seconds).Response Wait time: how long the agent deliberately waits after the caller stops speaking before it responds, from no added wait (the default) up to 5.5 seconds, shown in milliseconds below one second and in seconds above it. docs.retellai.com/build/conversation-flow/global-setting Read 14 Nov 2026.
  178. Retell AI, turn-taking setting: enable_dynamic_responsiveness: adjusts reply speed to the user's speech rate and past turn-taking; default false (Boolean (API field on the voice agent)).If set to true, the agent will dynamically adjust how quickly it responds based on the user's speech rate and past turn-taking behavior in the call. If unset, default value false will apply. docs.retellai.com/api-references/create-agent Read 14 Nov 2026.
  179. Retell AI, turn-taking setting: interruption_sensitivity: how easily the user can interrupt the agent, 0 to 1; at 0, never; default 1 (Range 0 to 1 (API field on the voice agent)).Controls how sensitive the agent is to user interruptions. Value ranging from [0,1]. Lower value means it will take longer / more words for user to interrupt agent, while higher value means it's easier for user to interrupt agent. If unset, default value 1 will apply. When this is set to 0, agent would never be interrupted. docs.retellai.com/api-references/create-agent Read 14 Nov 2026.
  180. Retell AI, turn-taking setting: Interruption Sensitivity (dashboard): new blank voice agents start at 0.9; the API default is 1 (New blank voice agents created in the dashboard; range 0 to 1).The API defaults to 1 when interruption_sensitivity is omitted. New blank voice agents created in the dashboard start at 0.9. docs.retellai.com/build/handle-background-noise Read 14 Nov 2026.
  181. Retell AI, turn-taking setting: allow_dtmf_interruption: DTMF input interrupts the agent even when interruption_sensitivity is 0; default false (Boolean (API field on the voice agent); can be overridden per conversation or subagent node).If set to true, DTMF input will interrupt the agent even when interruption_sensitivity is 0. Can be overridden per conversation or subagent node. Default to false. docs.retellai.com/api-references/create-agent Read 14 Nov 2026.
  182. Retell AI, turn-taking setting: enable_backchannel: the agent interjects phrases like "yeah" or "uh-huh"; off if not set (Boolean (API field on the voice agent)).Controls whether the agent would backchannel (agent interjects the speaker with phrases like "yeah", "uh-huh" to signify interest and engagement). Backchannel when enabled tends to show up more in longer user utterances. If not set, agent will not backchannel. docs.retellai.com/api-references/create-agent Read 14 Nov 2026.
  183. Retell AI, turn-taking setting: backchannel_frequency: how often the agent backchannels when it can, 0 to 1; default 0.8 (Range 0 to 1 (API field on the voice agent); only applies when enable_backchannel is true).Only applicable when enable_backchannel is true. Controls how often the agent would backchannel when a backchannel is possible. Value ranging from [0,1]. Lower value means less frequent backchannel, while higher value means more frequent backchannel. If unset, default value 0.8 will apply. docs.retellai.com/api-references/create-agent Read 14 Nov 2026.
  184. Retell AI, turn-taking setting: reminder_trigger_ms: user silence after agent speech that triggers a reminder to speak; default 10,000 ms (Milliseconds, positive number (API field on the voice agent)).If set (in milliseconds), will trigger a reminder to the agent to speak if the user has been silent for the specified duration after some agent speech. Must be a positive number. If unset, default value of 10000 ms (10 s) will apply. docs.retellai.com/api-references/create-agent Read 14 Nov 2026.
  185. Retell AI, turn-taking setting: begin_message_delay_ms: delays the first message, 0 to 5,000 ms; if unset or 0, the agent speaks at once (Milliseconds, range 0 to 5,000 (API field on the voice agent); only when the agent speaks first).If set, will delay the first message by the specified amount of milliseconds, so that it gives user more time to prepare to take the call. Valid range is [0, 5000]. If not set or set to 0, agent will speak immediately. Only applicable when agent speaks first. docs.retellai.com/api-references/create-agent Read 14 Nov 2026.
  186. Retell AI, turn-taking setting: Endpointing: how long the transcriber waits to finalize speech, set per provider in Custom Settings (Dashboard Custom Settings transcription mode; only providers with an Endpointing control).Select Custom Settings, then choose a Provider that supports all of the agent’s selected languages. For providers with an Endpointing control, adjust how long the transcriber waits to finalize speech. A longer window can help callers who pause while reading numbers, but can also delay the agent’s response. docs.retellai.com/build/transcription-mode Read 14 Nov 2026.
  187. Retell AI, turn-taking setting: Endpointing defaults (dashboard): 1,000 ms for Deepgram and Azure, 1,500 ms for Soniox and AssemblyAI (Dashboard Custom Settings, when no value is configured; as of October 2026).The dashboard offers these endpointing controls, in milliseconds (as of October 2026): Provider Slider range Default when no value is configured Deepgram 100–10,000 ms 1,000 ms Azure 100–10,000 ms 1,000 ms Soniox 500–3,000 ms 1,500 ms AssemblyAI 100–3,000 ms 1,500 ms docs.retellai.com/build/transcription-mode Read 14 Nov 2026.
  188. Retell AI, how the vendor defines a resolved or contained call: The customer writes the criteria (AI QA conditions and metrics); by default a call must meet every one (AI QA cohorts; weighted scoring can change how the criteria combine).You define this using two kinds of criteria: AI-evaluated conditions and performance metrics. By default, a call counts as successful only when it meets every condition and every metric. Enable weighted scoring to change how these criteria combine. docs.retellai.com/ai-qa/define-resolution-criteria Read 14 Nov 2026.
  189. Retell AI, how the vendor defines a resolved or contained call: The customer writes the criteria; call_successful (Post Call Extraction) records whether a call met them (Built-in Post Call Extraction field; the page says its prompt can be customized).call_successful — whether the call met the success criteria you define. docs.retellai.com/features/post-call-analysis-overview Read 14 Nov 2026.
  190. Retell AI, how the vendor defines a resolved or contained call: Call Resolution Rate is the percentage of calls resolved according to the customer's resolution criteria (AI QA metrics).Call Resolution Rate: Percentage of calls that were successfully resolved according to your defined resolution criteria. docs.retellai.com/ai-qa/terminologies Read 14 Nov 2026.