Onyx (formerly Danswer) is an open-source AI platform that gives enterprise teams a single, permission-aware interface to search and chat across all their internal knowledge. It connects to 40+ workplace tools — Slack, Google Drive, Salesforce, Confluence, GitHub, and more — ingests documents in real time, and uses hybrid RAG (semantic + keyword search + LLM knowledge graphs) to surface accurate, cited answers. Unlike closed SaaS rivals, Onyx is self-hostable and can run fully air-gapped, making it attractive to security-conscious buyers. It also ships an AI deep-research agent that breaks complex questions into parallel search paths and synthesizes a complete answer — positioned as "ChatGPT Enterprise meets Glean, but open-source." The Community Edition is MIT-licensed and free; a managed cloud tier runs $20/user/month; an Enterprise Edition adds SSO, RBAC, and advanced features. Customers range from Netflix (deployed to 14,000+ employees) to defense contractors like Thales Group. Founded in 2023 by Yuhong Sun and Chris Weaver (YC W24), the company is based in San Francisco.