Open-source enterprise knowledge search
Search and chat across the documents and tools a company already uses, with answers drawn from its own material. The open options connect to your sources, index them, and answer with a model you choose, on your own servers.
Questions people ask
What is the best open-source alternative to Glean?
Onyx, formerly Danswer, is the closest: 50+ connectors, agentic retrieval over a hybrid index, deep research and agents, with an MIT Community Edition. AnythingLLM and Open WebUI cover document search and chat for smaller deployments, and Khoj answers from your notes and files as well as the web.
Can these connect to our existing tools?
Onyx lists more than 50 indexing connectors out of the box or through MCP. The others take documents you upload or point them at, with AnythingLLM supporting many file types and Open WebUI searching across 9 vector databases. None of them matches a hosted service's connector list without work.
Do they support single sign-on and roles?
Open WebUI has roles, groups, LDAP, OAuth single sign-on and SCIM in its free edition, under a licence with a branding clause. Onyx's single sign-on, SCIM and role-based access are Enterprise Edition features under a paid licence. AnythingLLM has multi-user permissions in its Docker version.
Can the model run on our own servers too?
Yes. Onyx lists Ollama, LiteLLM and vLLM for self-hosted models, AnythingLLM supports local llama.cpp, Ollama and LM Studio, and Open WebUI is built around Ollama. That means the documents and the model can both stay inside your network.
Running one of these inside your own environment, with your own data and your own security rules, is the kind of work Reveneau does. Read how a forward deployed engagement works.