Retell AI

Voice AI

Retell AI is a developer-centric conversational platform optimized for high-performance phone interactions.

By AgDex Editorial · Reviewed July 2026

What is Retell AI?

Retell AI is a managed cloud platform tailored for phone-based AI agents. It prioritizes low-latency turn-taking and integrates deeply with customer service and scheduling workflows.

Key Features

Telephony-first: Automatic SIP bridging and number provisioning.
Low-Latency Conversions: Optimized turn-taking and interruption-aware design.
Live Tool Calling: Dynamic call transfers and live database queries during ongoing calls.

Pricing Estimate (2026)

Infrastructure fees typically start around $0.07/min, with total costs scaling depending on the selected LLM, telephony route, and TTS voices.