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Retell AI

Build human-like voice AI agents for customer-facing phone calls at scale

About Retell AI

Retell AI, founded in 2023 by Yi Liu and Zihao Wang and YC-backed, provides conversation engine infrastructure for voice agents. The platform focuses on ultra-realistic turn-taking, interruption handling, and seamless handoffs to humans. Target use cases include healthcare intake, lead qualification, and customer service. Customers span insurance, real estate, and home services with hundreds of businesses deploying Retell-powered voice bots in production.

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