Retell AI

Open

A developer-first platform for voice AI agents: build and deploy call agents with per-minute pricing and built-in telephony.

Description

Retell AI is a platform for building voice AI agents. Developers configure agents for phone calls without binding to one model, use built-in telephony, tool calling and pay only for actual usage by the minute.

Key features

  • Model-agnostic voice agent building
  • Built-in telephony and SIP
  • Tool calling
  • Per-minute billing
  • Human handoff

Pricing

Usage-based model: rates from $0.07 to $0.31 per minute depending on the chosen voice model.