Retell AI
Build AI phone agents with configurable conversation flows and call transfers.
Sources and review
Checked against public documentation on . Suitability guidance is our editorial judgment; this is not a performance benchmark or an endorsement.
Teams configuring AI phone conversations and transfer behavior through a managed platform.
You need a proven latency or transfer-success result before choosing; documentation describes capabilities, but your call paths still require evaluation.
About Retell AI
Retell AI is a managed platform for building AI phone agents. Its conversation-flow tools support cold, warm and agentic warm transfers, with configurable ring duration. Transfer behavior can depend on the telephony provider. Measure latency and successful handoffs on representative calls rather than assuming a universal response time.
Retell AI vs. the alternatives
All 32 alternatives →| Record | Stars | Pricing | ||
|---|---|---|---|---|
| Retell AIthis listing | — | — | — | Paid product |
| Pipecat | 16k | Python | BSD-2-Clause | Open source |
| LiveKit Agents | 14k | Python | Apache-2.0 | Open source |
| xiaozhi-esp32-server | 11k | JavaScript | MIT | Open source |
| ten-vad | 2.3k | C | — | Open source |
| bailing | 1.8k | Python | MIT | Open source |