Onyx

Onyx builds the open source application layer for LLMs, making Generative AI accessible to every company in the world. Founded by Chris Weaver and Yuhong Sun, the team combines deep ML and product expertise to deliver a platform that goes far beyond a simple chat UI. Onyx integrates internal knowledge connectors, live web search, MCP actions, and code execution into a single deployable platform. Backed by Khosla Ventures, First Round Capital, and Y Combinator, Onyx serves teams from emerging startups to global enterprises.