Retell AI

Retell AI is a voice AI startup focused on real-time conversational agents for enterprise phone systems. As of mid-2026, it processes over 40 million AI calls monthly with quarterly growth exceeding 300%, positioning it among the most scaled players in the Voice AI infrastructure layer alongside better-funded names like ElevenLabs and PolyAI . The company sits at the intersection of two trends: the shift from text-based AI interfaces to voice as the primary "context entry" for agents, and the enterprise demand for AI systems that can integrate into existing workflows rather than operate as black-box magic . In 十字路口Crossing's 2025 survey of the voice agent landscape, Retell was flagged as one of 18 startups to watch, with the publication noting its founding team's embeddedness in Silicon Valley and enterprise market circles as a risk-mitigating factor for investors .