Retell AI

Retell AI is not chasing attention. It is chasing a number most teams never touch without a hundred people and a war chest. $40M in annualized revenue, profitable, with a team that can still fit around a single whiteboard. That tension is the story. Founded in 2023 and sharpened inside Y Combinator W24, Retell AI came out of the gate with a simple, uncomfortable truth. The world still runs on phone calls, and most of those calls are powered by systems that feel older than the hold music. In a market flooded with surface-level AI, this is SaaS with teeth.

Bing Wu, Co founder and CEO, saw the gap from the product seat. Zexia Zhang, Co founder and CTO, went straight at the hard engineering. Todd Li, Co founder and President, turned motion into revenue. Weijia Yu, Co founder and COO, kept the machine tight. Evie Wang, Co founder and CMO, made the signal impossible to ignore, earning recognition on Inc.’s 2026 Female Founders list. Five operators, one thesis. If software ate the world, voice got left on the plate, and now it is being rebuilt as SaaS infrastructure that actually carries weight.

The product is where it gets surgical. Retell AI is an enterprise voice agent platform built for real calls, not demos. These agents talk, interrupt, recover, and close loops with human rhythm at roughly half a second latency. They plug into CRMs and back office systems so every conversation triggers action. Then comes Retell Assure, their quality layer that listens, flags, and improves performance without a human babysitter. This is not a bot. This is a system that learns how to carry a conversation that matters when the stakes are not theoretical, pushing SaaS beyond dashboards and into live interaction.

The market is not subtle. Healthcare, insurance, logistics, finance. Places where a missed call is not an inconvenience, it is lost revenue or broken trust. Retell AI is already handling over 40M calls a month across thousands of businesses, including enterprise operators who do not tolerate failure. Growth has been running north of 300% quarter over quarter. The math starts to bend when ARR per employee clears $1.7M. That is not hype. That is leverage, the kind that resets expectations for what elite SaaS execution actually looks like.

Capital came early and stayed focused. A $4.6M seed led by Alt Capital with Y Combinator and Carya Venture, backed by operators who have built real companies. No excess. Just enough fuel to prove the engine works, then scale it without losing control. And it works.

The culture follows the numbers. Small, fast, accountable. Roles are built around ownership, not maintenance. Engineers, researchers, builders who want to work on real time AI that people actually hear on the other end of a line. The kind of work where latency is felt, not measured, and every shipped improvement echoes across millions of conversations.

If your business lives on the phone, Retell AI is already in your lane. If you build, they are hiring across engineering, AI, product, and content. The door is open, but the bar is high. Some companies make noise. Some change the tone of the entire room. Retell AI is doing the latter, one call at a time, and the line is getting shorter for everyone else.