Retell AI — Developer platform, based in United States. Pricing is available on request. A free trial is available.
Visit website ↗| Plan | Entry price | Included | Notes |
|---|---|---|---|
| Pay as you go (voice) | 0.07 USD / minute | $10 free credits; 20 free concurrent calls | Published range $0.07-$0.31/min depending on components. Components: Retell voice infrastructure $0.055/min; telephony $0.015/min (Twilio/Telnyx; SIP trunk/custom telephony $0); TTS $0.015/min (platform, Minimax, Fish, Cartesia, OpenAI, Inworld) up to $0.04-$0.10/min for ElevenLabs models; LLM from ~$0.0016/min (GPT 5 nano) to $0.16+/min (e.g. Claude 5 Sonnet $0.064, GPT 5.1 $0.04). Speech-to-speech models $0.05-$0.38/min. |
| Voice infrastructure fee | 0.055 USD / minute | Platform component, billed per second. | |
| Telephony (Retell numbers via Twilio/Telnyx) | 0.015 USD / minute | Phone number $2/month (US/CA), toll-free $5/month per docs; verified number $10/month. | |
| Enterprise | Contact sales | custom; 50+ concurrency | Custom pricing; custom MSA/DPA, custom BAA, SSO, RBAC, dedicated server add-on. |
55 languages · Polish confirmed
Docs 'Supported languages by provider' list 55 languages; Polish (pl-PL) supported for TTS (platform, MiniMax, Cartesia, Inworld, Fish Audio, ElevenLabs, OpenAI) and ASR (Deepgram, Azure, Soniox; not AssemblyAI). Dedicated Polish landing page exists.
Retell-managed numbers: US and Canada only (docs). Other countries, incl. Poland/EU, via custom telephony / SIP trunk / imported numbers (Twilio, Telnyx, Vonage etc.). Outbound from Retell numbers to a limited list of ~15 countries (docs inconsistent).
Self-service AI receptionist built in Poland: answers 24/7, books appointments into Google or Outlook calendars, takes orders, sends SMS follow-ups, transfers to staff and gives you a transcript of every call.
AI phone receptionist for growing teams: the same 24/7 answering, booking, SMS and call transfers, plus a live Pulse dashboard and call-quality analytics across assistants and locations.
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https://www.callagentindex.com/en/tools/retell-ai