Slab review

Slab is the lowest-cost paid option here for an internal knowledge base. Teams write posts, organize them into topics and mark content as verified, and unified search looks across Slab and connected tools such as Google, Slack and GitHub. The free plan covers up to 10 users with 90 days of version history. Startup at $6.67 per user per month billed annually removes the user cap and adds private topics, AI Autofix, unlimited standard integrations and 365 days of version history. Business at $12.50 adds custom domains, AI Ask and AI Predict, SAML SSO, SCIM and a GraphQL API. Nonprofits and schools can request the Startup plan for free. Slab is narrower than the leaders: there is no public help center, so support teams still need a separate tool for customers, and every account can edit, since there are no read-only users.

Who it is for

Small and midsize teams that want a clean, low-cost internal wiki.

Price

Free for up to 10 users; Startup $6.67 and Business $12.50 per user per month billed annually.

Startup $ 6.67 user / month billed annually
Quoted from the vendor pricing page on November 5, 2026.

Key features

• Posts organized into topics, with private topics on paid plans
• Content verification to flag what is current
• Unified search across Slab and connected tools
• AI Autofix on Startup, AI Ask and AI Predict on Business
• SAML SSO, SCIM provisioning and a GraphQL API on Business

Strengths and weaknesses

• Strength: Free for up to 10 users
• Strength: Cheapest paid plan on this list at $6.67 per user billed annually
• Strength: 30 day money-back guarantee
• Weakness: Internal wiki only, with no customer help center
• Weakness: AI Ask requires the Business plan
• Weakness: No read-only user accounts

Key facts

• Free plan: Up to 10 users
• Paid tiers: Startup $6.67, Business $12.50 per user per month billed annually
• Guests: 3 per user on Startup, 5 on Business
• Nonprofits and education: Startup plan free on request

Where it ranks

Slab is No. 8 in our Best Knowledge Base Software verdict.