Documentation · head to head
BookStack vs Slab
BookStack
Documentation
Self-hosted documentation wiki with a fixed shelf, book, chapter and page structure
- From
- Free
- Rated
- -
Slab
Documentation
Internal knowledge base for teams, organised by topic rather than folders, with search across connected tools
- From
- Free
- Rated
- -
The short version
- Each has a real cost: BookStack there is no vendor-hosted option at all, so you own the server, TLS certificates, database backups and upgrades, or you pay a third-party host that has no support relationship with the project and no ability to fix a bug.; Slab it is built for internal knowledge, so public product documentation on a custom domain with versioning is outside what the product does.
- They diverge on capability: BookStack covers Shelves, books, chapters, pages, Slab covers Topics instead of folders.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which BookStack and Slab actually diverge.
Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Documentation).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in BookStack
- Shelves, books, chapters, pages
- Dual editors
- Granular permissions
- Full text search
- Page revisions
- REST API
- External authentication
- Export
Only in Slab
- Topics instead of folders
- Unified search
- Post verification
- Quill editor
- Permissions
- Free tier for small teams
What people use each for
The jobs each tool is most often brought in to do.
BookStack
- Running an internal knowledge base on infrastructure inside a network that cannot reach external SaaSnot Slab
- Documenting procedures and runbooks where a fixed structure prevents the tree sprawl a free-form wiki producesnot Slab
- Replacing a Confluence licence for a team that needs pages, permissions and search but none of the surrounding suitenot Slab
- Publishing customer-facing manuals from the same instance as internal documentation using per-book permissionsnot Slab
Slab
- Building an employee handbook and onboarding path that new starters can actually findnot BookStack
- Replacing a folder-based wiki where nobody agrees which folder a document belongs innot BookStack
- Companies whose knowledge is already spread across Drive, Slack and GitHub and needs one search boxnot BookStack
- Documenting process and decisions for teams that do not want a project management tool attachednot BookStack
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
BookStack
- There is no vendor-hosted option at all, so you own the server, TLS certificates, database backups and upgrades, or you pay a third-party host that has no support relationship with the project and no ability to fix a bug.
- The shelf, book, chapter, page hierarchy is fixed at four levels and cannot be reshaped, so migrating a deeply nested Confluence or MediaWiki space means flattening content by hand and losing the original structure.
- It requires PHP and MySQL or MariaDB, which is a stack many engineering teams no longer run, so adopting it usually means introducing a database and runtime nobody else in the organisation maintains.
- Development is concentrated on a single maintainer, which makes the bus factor a legitimate procurement question for anything the organisation intends to depend on for a decade.
- Content lives in the database rather than in files under version control, so there is no docs-as-code workflow, no review by pull request and no branch per release.
- Export is per page, chapter or book, so moving a large instance to another platform means writing a script against the REST API rather than copying a directory of Markdown.
Slab
- It is built for internal knowledge, so public product documentation on a custom domain with versioning is outside what the product does.
- There is no docs-as-code workflow, no git synchronisation and no markdown files on disk, so engineering-owned technical documentation ends up somewhere else anyway.
- Hierarchy is shallow by design, and organisations that genuinely need deep nested structure find topics an awkward substitute rather than an improvement.
- There is no offline mode, so a knowledge base that includes incident runbooks is unavailable during exactly the incident where the network is the problem.
- Pricing is per user per month, so organisations where most staff only read a handbook twice a year still pay a seat for each of them.
Pricing, plan by plan
BookStack
Free- BookStackFree
- MIT licence with no paid edition
- All features included, no seat limits
- Self-hosted on your own infrastructure
Slab
Free- FreeFree
- Up to ten users
- Unlimited posts
- Core integrations
- Slab$undefined/month
- Priced per user per month with annual billing
- Unlimited users and history
- Full integration set and unified search
Which should you pick?
Choose BookStack if
- You need shelves, books, chapters, pages.
- You want to start without paying.
- You work on Web, Self-hosted, Docker.
- You also want dual editors.
Choose Slab if
- You need topics instead of folders.
- You want to start without paying.
- You also want unified search.
Questions people ask
- Is BookStack or Slab better?
- Neither clearly leads. BookStack starts at Free and Slab at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, BookStack or Slab?
- BookStack starts at Free and Slab at Free.
- Does BookStack or Slab run on more platforms?
- BookStack runs on Web, Self-hosted, Docker. Slab runs on Web.
- Can I use BookStack for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is BookStack best used for?
- BookStack is most often used for running an internal knowledge base on infrastructure inside a network that cannot reach external saas, documenting procedures and runbooks where a fixed structure prevents the tree sprawl a free-form wiki produces, replacing a confluence licence for a team that needs pages, permissions and search but none of the surrounding suite, publishing customer-facing manuals from the same instance as internal documentation using per-book permissions. Of those, running an internal knowledge base on infrastructure inside a network that cannot reach external saas and documenting procedures and runbooks where a fixed structure prevents the tree sprawl a free-form wiki produces are not what Slab is typically brought in for.
- What can BookStack do that Slab cannot?
- BookStack covers Shelves, books, chapters, pages, Dual editors, Granular permissions, Full text search. Slab covers Topics instead of folders, Unified search, Post verification, Quill editor.
Answered from the vendors’ own pages
BookStack: Is there a paid or hosted version?
No. BookStack is MIT-licensed with no commercial edition and no official hosted service. Third-party hosts exist but are unaffiliated with the project.
Slab: Can I publish documentation publicly with Slab?
Posts can be shared by link, but it is not a product documentation platform. There is no custom domain publishing, versioning or API reference tooling.
BookStack: Can I nest pages more deeply?
No. Four levels is the design, not a limitation waiting to be fixed, and content that needs deeper nesting has to be restructured.
Slab: What does the free plan actually cover?
Up to ten users with unlimited posts and core integrations. It is a real free tier rather than a trial, and it is enough for a small company handbook.
BookStack: Does it support single sign-on?
Yes, through LDAP, SAML2 or OpenID Connect, with group to role mapping, and none of it is gated behind a paid tier because there is no paid tier.
Slab: How does it compare with a general workspace tool?
Slab does less on purpose. There are no databases, boards or task views, which makes it faster to write in and much harder to turn into an unmaintained sprawl.
BookStack: How hard is it to migrate content in?
Straightforward for flat content through the REST API, awkward for deeply nested wikis, because the structure has to be collapsed to fit.
Slab: Does search really cover other tools?
Yes, connected sources are indexed and appear in results. That integration is the main reason to choose it, so verify your specific tools are supported before committing.
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