Chat looks like a text box. Behind it sits a small infrastructure company. Stream lets app makers rent that company - and spend their engineering time somewhere else.

A fashion network gave him a scaling problem. A transatlantic move gave him the room to solve it. Now the self-taught programmer behind Stream is building the plumbing for conversations most users never think about.
Sendbird is a San Mateo-based communications platform that started as a chat SDK for apps and has become an omnichannel AI agent platform. Its APIs power messaging, voice, video, and AI agents inside more than 4,000 apps, including DoorDash, Reddit, Match Group, Noom, and Yahoo Sports, reaching roughly 6 billion users and routing 7 billion conversations a month.