Retell AI

Retell AI is a developer-first platform for building ultra-realistic AI phone agents with 800ms latency and native interruption handling.

Retell AI provides the infrastructure to deploy conversational voice agents that manage high-volume calls with human-like precision. The platform hits sub-second response times (800ms) and handles interruptions naturally through native barge-in detection. Since its Y Combinator debut and $4.6M seed round, Retell has scaled to $10M in ARR by offering total flexibility: developers can chain LLMs like GPT-4, integrate premium voices from ElevenLabs, and connect via Twilio or BYOC telephony. From qualifying leads to 24/7 appointment setting, the system automates complex workflows for a transparent $0.07 per minute.

https://www.retellai.com