What Retell AI does
Retell AI is a voice-agent infrastructure platform for production phone workflows, aimed at replacing or augmenting contact-center and telephony operations (inbound and outbound) with AI voice agents that can listen, reason, and take actions during real phone calls. The platform emphasizes low-latency conversational behavior, turn-taking and interruption handling, and the ability to execute “agentic” actions mid-call via function calling, while keeping workflows deployable through telephony integrations (e.g., SIP trunking and vendor telephony APIs). Retell positions its product as an enterprise-grade stack for building, deploying, and monitoring AI voice agents for use cases such as reception/answering, lead qualification, appointment booking, IVR replacement/navigation, and post-call analytics and QA. In its seed announcement and company materials, Retell reports scaling outcomes in terms of annualized revenue and call volume, and it highlights compliance/security capabilities such as HIPAA, SOC 2 Type II, and GDPR.