Open Source Glean Alternatives
A curated collection of the 2 best open source alternatives to Glean.
The best open source alternative to Glean is Onyx. If that doesn't suit you, we've compiled a ranked list of other open source Glean alternatives to help you find a suitable replacement. Other interesting open source alternative to Glean is PipesHub.
Glean alternatives are mainly AI Search Tools but may also be Search Engines or Workflow Automation Tools. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Glean.
Written by Piotr Kulpinski
An open-source platform that connects to 40+ apps to provide intelligent search and AI assistance across all company information
Onyx is a powerful open-source enterprise search platform that transforms how teams find and access information. With seamless integration across 40+ popular business tools like Slack, GitHub, Notion, and Google Workspace, it creates a unified search experience powered by AI.
Key features include:
- AI Workplace Search that helps teams quickly find answers across all connected apps and documents
- AI Assistant capabilities that leverage your organization's knowledge to provide contextual responses
- Developer-friendly APIs for building custom workflows and integrations
- Enterprise-grade security with document-level permissions and optional air-gapped deployment
- Model flexibility allowing you to choose or self-host your preferred AI models
The platform is designed to be highly extensible with modular architecture, making it easy to customize and adapt to your specific needs while maintaining complete control over your data.
Looking for open source alternatives to other popular services? Check out other posts in the alternatives series and openalternative.co, a directory of open source software with filters for tags and alternatives for easy browsing and discovery.
Transform scattered business data into actionable insights with AI-powered enterprise search, workflow automation, and explainable results with full source citations.
PipesHub transforms how teams access and act on business information by unifying scattered enterprise data across all your workplace applications. Built as an open-source Glean alternative, it combines powerful enterprise search with intelligent workflow automation.
Key capabilities include:
- Explainable AI responses with full source citations and confidence scores for every insight
- Enterprise search across Drive, Slack, Jira, email, and 100+ business applications
- No-code workflow builder that creates AI agents to reason across data and execute tasks
- Full context preservation of attachments, comments, and entity relationships
- Developer-first architecture with open APIs, SDKs, and extensible connectors
The platform maintains enterprise-grade security with SOC 2 compliance and granular permission controls that preserve original document access rights. Deploy quickly with Docker Compose or scale horizontally for enterprise-wide implementations.
Unlike proprietary solutions, PipesHub offers model flexibility - integrate OpenAI, Claude, Ollama, or run your own local LLMs without vendor lock-in. The growing developer community of 500+ active contributors continuously extends capabilities through open-source collaboration.
Perfect for fast-moving teams that need reliable, traceable AI insights backed by evidence rather than black-box answers.
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