Retell AI

retellai.com ↗

Build, test, deploy and monitor AI voice and chat agents.

SI Score
75/100
Pricing
Not confirmed
Free plan
Not confirmed
Sign-up required
Not confirmed

Ask SI about Retell AI

Answers use saved listing facts and recorded sources.
SI REVIEWBased on the site's own pages, in a directory managed by people

What it does

Retell AI is a platform for building AI voice and chat agents. It runs the telephony, speech and language model layers, so you configure an agent instead of connecting providers. Agents use a single prompt or a conversation flow, with call handling, a knowledge base and integrations built in. You can test agents in text or audio, deploy them to phone numbers, web widgets or SMS, and monitor live calls and analytics.

Agents can be built from a dashboard without code or through the API, SDKs and an MCP server. Testing options include a playground, simulation tests and A/B testing. Deployment supports buying a US or Canada number, connecting a provider over SIP, a website voice widget and web calls. Monitoring includes live transcripts, listening in, taking over a call, custom analytics and automatic quality scoring. Call transfer supports cold, warm and agentic warm handoffs. The documentation states HIPAA compliance with a signed BAA, SOC 2 Type 1 and Type 2 certification, and GDPR compliance.

Best for
Lead qualificationCustomer supportAppointment schedulingPatient intake