Top Open Source Enterprise Knowledge Search Tools in 2026
A curated collection of the 8 best free and open-source Enterprise Knowledge Search tools in 2026. Compare features, GitHub stars, tech stacks, and self-hosted software.
SurfSense
Open-source NotebookLM alternative for live web research
Stars16,022Last commit13d agoLicenseOpen Source
Swirl Search
Private knowledge layer for enterprise AI search
Stars3,043Last commit2mo agoLicenseApache-2.0
Pipeshub
Open-source enterprise AI with explainable search
Stars3,694Last commit10d agoLicenseApache-2.0Onyx
Open-source enterprise search & AI assistant
Stars31,787Last commit11d agoLicenseOpen SourceCorpus
Upload files, ask questions, and get AI‑backed answers with citations. Compare, synthesize, and export results for teams and polished outputs.
Stars13Last commit4mo agoLicenseAGPL-3.0
MaxKB
Open-source platform for building enterprise-grade agents
Stars22,625Last commit10d agoLicenseGPL-3.0FastGPT
FastGPT is a free, open-source platform for creating AI-powered knowledge bases with data processing, model invocation, and visual workflows.
Stars29,486Last commit10d agoLicenseOpen Source
AnythingLLM
Private AI assistant running entirely on your device
Stars65,277Last commit11d agoLicenseMIT
