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 Search Engines but may also be AI Search Tools or AI Agent Platforms. 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.
Connect your business apps, organize scattered data, and deploy AI agents that reason with evidence. Open source, fully auditable, deploy anywhere.
PipesHub is an open-source, enterprise-ready AI platform built for teams that need trustworthy answers backed by evidence. Unlike typical AI tools that return similar text, PipesHub combines knowledge graphs with page ranking to deliver results you can verify with pinpoint citations, confidence scores, and direct links to source documents.
Key capabilities include:
- Trustworthy AI with citations – Every answer includes exact sources, highlighted evidence, and page-level references so you can verify results across your connected systems
- Knowledge graph-first retrieval – Structured reasoning across documents, entities, and metadata instead of simple keyword matching
- Full data ownership – Apache 2.0 licensed, audit every line, deploy on your infrastructure, and choose your own AI models from OpenAI, Anthropic, Google, Mistral, or run fully local with Ollama
- No vendor lock-in – Bring your own API keys and control AI spend directly with transparent pricing
- Enterprise-grade scalability – Cloud-native architecture handles millions of documents with horizontal scaling and fault tolerance
- AI agents that work – Build no-code or custom agents in Python, Go, and TypeScript that reason, cite, and automate workflows across your entire stack
- Unified knowledge management – Connect Google Drive, Slack, Jira, Confluence, Salesforce, GitHub, and 30+ other apps with permission-aware indexing
- Security by design – SOC 2 Type I & II compliant, ISO 27001 certified, with role-based access control and full audit trails
Deploy in minutes with Docker, scale from single instances to enterprise infrastructure, and expose your knowledge graph to Claude, Cursor, VS Code, or custom applications via MCP servers and SDKs.
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