Retell AI
VS Bland AI

Retell is a voice AI platform for building production-grade phone agents. It handles inbound and outbound calls end-to-end — answering the phone, running the conversation, calling your tools, transferring to a human, and closing the task. Teams run Retell in production for support, sales, scheduling, collections, and operations.

Very natural. Retell combines high-quality voice synthesis, sub-second latency, and dynamic turn-taking that adapts to how people actually talk — interruptions, overlap, backchannels, and repairs. Most callers don't realize they're talking to AI until the agent tells them.

Retell hits 95% speech recognition accuracy in production. That number holds up across accents, background noise, and real-world call conditions — not just studio audio — which is what separates demo-quality voice AI from something you can actually ship.

Retell is built for high-volume production traffic. Call quality, latency, and accuracy hold steady whether you're running ten concurrent calls or ten thousand, across inbound queues and outbound batch campaigns. Reliability is a first-class requirement, not a stretch goal.

Retell is API-first and fully programmable. You control the prompt, the tools, the transfer logic, the voice, the model, and the call flow — all through the API. Nothing about the agent is a black box, so you can tune behavior for your exact use case instead of settling for the platform's defaults.