Onyx (formerly Danswer)

Onyx is an open-source AI chat and search tool that connects to a company's documents, apps, and internal knowledge. Employees ask questions and get answers grounded in that connected content, and the same chat interface supports deep-research queries, a code interpreter, and live web search. It uses hybrid search and a knowledge graph approach to retrieval for more accurate grounding than basic keyword or vector search alone. It was previously known as Danswer. Technical teams can self-host it for free using its open-source code, which sits on GitHub with more than 20,000 stars, or run it through its managed cloud service. The company states SOC 2 Type II certification and GDPR compliance.

This fits a company with engineering capacity that wants an AI search and chat tool it can run on its own infrastructure for cost or data-control reasons, or one that would rather pay for a managed version of the same open-source project. A practical starting point is self-hosting the open-source version on a technical team's own documentation at no license cost, deciding later whether to move to the paid cloud plan. The managed Business cloud plan costs $20 per user per month on an annual commitment and covers more than 40 connectors and custom AI agents; confirm current pricing before committing, and note that Enterprise features like single sign-on and white-labeling need a custom quote. Because this is a newer, renamed project, check the vendor's support track record and update history, not just its GitHub star count.