Retell AI

Retell AI is a voice AI platform that lets businesses build, deploy, and manage human-sounding AI phone agents at scale. The platform handles inbound and outbound call automation—appointment booking, customer support, lead qualification, payment reminders, and IVR navigation—with support for multiple languages, custom voice models, and CRM integration.

Healthcare providers, financial services companies, logistics firms, and contact centers use Retell AI to automate high-volume phone interactions without sacrificing call quality. The platform includes real-time transcription, call recording, sentiment analysis, and batch calling features, giving operations teams visibility into agent performance and call outcomes across thousands of simultaneous conversations.

Retell AI raised $4.6M in seed funding in 2024 and has built a technically robust platform, but voice AI still struggles with complex objection handling and emotionally sensitive calls—human escalation paths remain essential. Call quality depends heavily on integration setup and knowledge base maintenance; outdated information in the knowledge base produces incorrect agent responses. Pricing scales with call volume, so costs can grow quickly for high-traffic use cases.

Healthcare, financial services, logistics firms, and contact centers use Retell AI to automate inbound and outbound phone calls like appointment booking, lead qualification, and support.