Retell AI
Build AI phone agents for inbound and outbound calls with natural latency, branching call logic, and built-in CRM integration — no voice infrastructure to manage.
Overview
Retell AI is a platform for building and deploying conversational voice agents for phone-based customer interactions — inbound support lines, outbound sales calls, appointment reminders, and intake flows. It handles the full voice stack (STT, LLM, TTS) with latency low enough for natural conversation, and includes a workflow builder for branching call logic without code. What sets Retell apart from raw voice APIs is the built-in call management layer: phone number provisioning, call recording, transcripts, analytics, and CRM integrations. Used by healthcare practices, real estate agencies, and SaaS companies building automated phone workflows that sound natural enough to handle without human intervention.
Key Features
- Inbound and outbound calling
- Visual call flow builder
- CRM integrations
- Call recording and transcripts
- Phone number provisioning
- Real-time analytics
- • Full-stack voice solution — less infrastructure than building from components
- • Visual workflow builder requires no code for call logic
- • Strong integrations with healthcare and real estate tools
- • Per-minute costs scale quickly at production volume
- • Less model flexibility than raw API alternatives