Voice agents and telephony
Retell AI
Production voice AI agents, billed per minute
Use caution: a developer platform; AI calls need consent and a notice that it is a bot (EU AI Act Art. 50).
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About this service
Retell AI is a voice agent for calling customers and answering calls. Billing is per minute with no monthly plans: $0.07-0.31 per agent minute, plus LLM, voice and telephony separately. $10 of free credits to start.
What you can do with it
- answering calls outside working hours
- appointment reminders by voice
- answers to common customer questions by phone
Who it suits
- salons, clinics, delivery services
- businesses that want simpler onboarding than Vapi
Strengths
- clear price per minute
- $10 to start without a card
Limitations
- This is a voice bot: the other party must know that AI is speaking (EU AI Act, Art. 50, from 08/02/2026)
- real cost depends on the LLM model; Ukrainian language not verified
Integrations
- Twilio
- Google Calendar
- HubSpot
- Zapier
Alternatives to Retell AI
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ElevenLabs Agents
Voice agents and telephonyVoice and voice agents with high-quality speech synthesis
- Free plan
- from $6/mo
Niche Try
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