Onyx score factors
Editorial quality78
Practical utility84
Trust & transparency80
Freshness88
Engagement quality8
Momentum100
Decision guide · Reviewed Sep 23, 2026 · AI Knowledge Management, AI Enterprise Search
Onyx
76.7
Slab
75.4Choose Onyx when you need engineering and operations teams requiring self-hostable, permission-aware enterprise search connected to multi-app ecosystems. Choose Slab when you need teams wanting a clean, structured company wiki with integrated search across external developer, communication, and storage tools.
At a glance
The practical differences
| Decision factor | Onyx | Slab |
|---|---|---|
| Best for | engineering and operations teams requiring self-hostable, permission-aware enterprise search connected to multi-app ecosystems | teams wanting a clean, structured company wiki with integrated search across external developer, communication, and storage tools |
| Not ideal for | teams seeking a lightweight document reader without technical infrastructure or integration configuration needs | organizations requiring native read-only user accounts or teams wanting a broader work management platform with relational databases and kanban boards |
| Pricing | Pricing reflects published Business plan rates billed annually as of September 2026. Self-hosting via open source is available, and an Enterprise tier requires contacting sales. Verify current terms on the official pricing page. | Pricing snapshot as of the 2026-09-08 review date reflecting annual billing ($6.67/user/month for Startup and $12.50/user/month for Business). Always verify current monthly rates and enterprise quotes on the official pricing page. |
| Key difference | Onyx combines open-source transparency and self-hosting flexibility with enterprise-grade permission inheritance across 40+ connectors, hybrid search, and knowledge graph RAG. | Slab focuses strictly on knowledge management rather than trying to replace an entire workplace stack, pairing standardized document formatting with Unified Search that indexes both internal posts and connected tools like GitHub, Slack, and Google. |
| Overall rank | #183 | #310 |
| Review verdict | Onyx suits engineering-led workplaces and security-conscious enterprises seeking an auditable, self-hostable alternative to proprietary workplace search tools like Glean. It is less suited for small teams without dedicated technical support or organizations needing a turnkey, zero-configuration hosted tool out of the box. | Slab suits engineering, product, and remote teams seeking a fast, uncluttered documentation hub that connects across their existing software stack. It does not suit teams requiring dedicated read-only user licenses or those looking for an all-in-one database and task tracker. |
Slab score factors
Editorial quality78
Practical utility82
Trust & transparency85
Freshness74
Engagement quality7
Momentum100
Onyx strengths
- Open-source codebase allows full auditing, self-hosting, and infrastructure transparency
- Inherits granular permissions and RBAC across more than 40 enterprise connectors
- Supports modern agent capabilities including MCP actions, code execution, and web search
Slab strengths
- Free plan supports up to 10 users with unlimited posts, topics, templates, and real-time collaboration.
- Unified Search retrieves content from integrated external applications like Slack, GitHub, and Google.
- Independently verified security posture with SOC 2 Type 2, SOC 3, and GDPR compliance.
- Free Startup tier access available for non-profit and educational institutions upon request.
Frequently asked
Onyx vs Slab
Should I choose Onyx or Slab?+
Choose Onyx when you need engineering and operations teams requiring self-hostable, permission-aware enterprise search connected to multi-app ecosystems. Choose Slab when you need teams wanting a clean, structured company wiki with integrated search across external developer, communication, and storage tools. ToolsRank scores Onyx 76.7 and Slab 75.4; the gap reflects editorial quality, utility, trust, and freshness, not popularity or payment.
Is Onyx cheaper than Slab?+
Onyx: Pricing reflects published Business plan rates billed annually as of September 2026. Self-hosting via open source is available, and an Enterprise tier requires contacting sales. Verify current terms on the official pricing page. Slab: Pricing snapshot as of the 2026-09-08 review date reflecting annual billing ($6.67/user/month for Startup and $12.50/user/month for Business). Always verify current monthly rates and enterprise quotes on the official pricing page. Compare the plan you would actually use and verify current prices on each vendor's pricing page before purchasing.
Which is better for ai knowledge management?+
Onyx currently scores higher for ai knowledge management work. Slab remains the stronger pick when your priority is teams wanting a clean, structured company wiki with integrated search across external developer, communication, and storage tools. Avoid Onyx if you are teams seeking a lightweight document reader without technical infrastructure or integration configuration needs.
Can I use Onyx and Slab together?+
Yes. Onyx stands out for onyx combines open-source transparency and self-hosting flexibility with enterprise-grade permission inheritance across 40+ connectors, hybrid search, and knowledge graph RAG. Slab stands out for slab focuses strictly on knowledge management rather than trying to replace an entire workplace stack, pairing standardized document formatting with Unified Search that indexes both internal posts and connected tools like GitHub, Slack, and Google. Pairing them makes sense when one workflow needs both strengths; otherwise pick the tool that matches your primary job.