The best open source alternative to Onyx is Pipeshub. If that doesn't suit you, we've compiled a ranked list of other open source Onyx alternatives to help you find a suitable replacement. Other interesting open source alternative to Onyx is Swirl Search.
Onyx alternatives are mainly Enterprise Knowledge Search. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Onyx.
Self-hostable enterprise AI platform that unifies business data across apps, powers a knowledge graph for cited answers, and lets teams build AI agents across their stack.

PipesHub is an open-source enterprise AI platform built for teams that need accurate, explainable answers from their internal knowledge, without shipping sensitive data to a vendor's cloud. It positions itself as a self-hostable alternative to Glean, giving organizations full control over their infrastructure, models, and data.
At its core, PipesHub builds a knowledge graph across your connected apps, so queries return structured, reasoned results rather than fuzzy keyword matches. Every answer comes with pinpoint citations: page numbers, paragraph references, and direct links back to the source document. Confidence levels are surfaced explicitly, so users know when an answer is well-supported versus tentative.
Key capabilities include:
The platform is Apache 2.0 licensed, so every line is auditable. SOC 2 Type I compliance is in place, with ISO 27001 and VAPT certifications also covered. If a user can't see a document in Drive, they can't surface it through PipesHub either, permissions aren't re-implemented, they're inherited.
Agents can be scoped per department, triggered by events, and wired to take actions like creating Jira tickets from emails, syncing notes to Confluence, or sending Slack alerts. The platform scales horizontally and handles millions of indexed documents from a single Docker deployment up to full enterprise infrastructure.
AI-powered search and RAG platform that connects to 100+ enterprise tools without data migration. Deploy securely on-premises with any LLM.

SWIRL transforms how enterprises access their knowledge by connecting AI directly to existing data sources without requiring expensive migrations or exposing sensitive information.
Key advantages:
Real enterprise impact:
Universal search capabilities include relevancy re-ranking, real-time data access, and AI agent enablement. SWIRL eliminates the data scavenger hunt by providing instant answers from your company's information while keeping your intellectual property secure and maintaining full control over your data governance.
Open-source wiki software with real-time collaboration, diagrams, AI, SSO, RBAC permissions and more.
Get started now