Slab alternatives · Docs & Wikis
Open-source alternatives to Slab
Slab is not described as open source on its own site. 15 of the 51 other docs and wiki tools in this directory are open source, according to their own sites.
Slab has a free plan. Paid plans start at $6.67 per user / month, billed annually ($8 billed monthly). All of them are free or have a free plan.
15 tools · Listings checked up to Oct 9, 2026 · Where the facts come from
The 12 closest to Slab
- Free plan · from $10/mo
Outline
Fast team knowledge base and wiki, cloud-hosted or self-hosted
- Outline starts at $10 per month for a team of 1 to 10 members (cloud-hosted). Slab starts at $6.67 per user / month, billed annually ($8 billed monthly).
- Only Slab lists a browser extension.
- Outline is open source and self-hostable, according to its own site.
- Outline also covers Markdown.
- Free plan · from $900/yr
Documize
Self-hosted knowledge base with approvals and analytics
- Documize starts at $900 per year for up to 100 users. Slab starts at $6.67 per user / month, billed annually ($8 billed monthly).
- Only Slab lists macOS and Windows apps.
- Only Slab lists a browser extension.
- Documize is open source and self-hostable, according to its own site.
- Free plan · from £450/yr
BookStack
Free self-hosted wiki organized into books, chapters and pages
- BookStack starts at £450 per year for an optional support plan; the software itself is free. Slab starts at $6.67 per user / month, billed annually ($8 billed monthly).
- Only Slab lists macOS and Windows apps.
- Only Slab lists a browser extension.
- BookStack is open source and self-hostable, according to its own site.
- Free plan · from $6/mo
Docmost
Open-source collaborative wiki you deploy on your own servers
- Docmost starts at $6 per seat / month, billed annually (Business, 10-seat minimum). Slab starts at $6.67 per user / month, billed annually ($8 billed monthly).
- Only Slab lists macOS and Windows apps.
- Only Slab lists a browser extension.
- Docmost is open source and self-hostable, according to its own site.
- Free plan · from $20/mo
ONLYOFFICE
Open-source office suite for documents, sheets, slides and PDFs
- ONLYOFFICE starts at $20 per admin / month for the DocSpace Business cloud plan. Slab starts at $6.67 per user / month, billed annually ($8 billed monthly).
- Only ONLYOFFICE lists Linux, iOS and Android apps.
- Only Slab lists a browser extension.
- ONLYOFFICE is open source and self-hostable, according to its own site.
- Free
Etherpad
Open-source real-time collaborative editor you host yourself
- Etherpad is free. Slab starts at $6.67 per user / month, billed annually ($8 billed monthly).
- Only Etherpad lists a Linux app.
- Only Slab lists a browser extension.
- Etherpad is open source and self-hostable, according to its own site.
- Free plan · from $1,620/yr
BlueSpice
Open-source enterprise wiki built on MediaWiki
- BlueSpice starts at $1,620 per year for up to 25 users, cloud-hosted (about $5.40 per user / month). Slab starts at $6.67 per user / month, billed annually ($8 billed monthly).
- Only Slab lists macOS and Windows apps.
- Only Slab lists a browser extension.
- BlueSpice is open source and self-hostable, according to its own site.
- Free
Wiki.js
Open-source wiki software built on Node.js with Git sync
- Wiki.js is free. Slab starts at $6.67 per user / month, billed annually ($8 billed monthly).
- Only Slab lists macOS and Windows apps.
- Only Slab lists a browser extension.
- Wiki.js is open source and self-hostable, according to its own site.
- Free
MediaWiki
The free wiki software that powers Wikipedia
- MediaWiki is free. Slab starts at $6.67 per user / month, billed annually ($8 billed monthly).
- Only Slab lists macOS and Windows apps.
- Only Slab lists a browser extension.
- MediaWiki is open source and self-hostable, according to its own site.
- Free plan · from $3.40/mo
Collabora Online
Self-hosted, open-source office suite based on LibreOffice
- Collabora Online starts at $3.40 per user / month on a yearly subscription (up to 99 users). Slab starts at $6.67 per user / month, billed annually ($8 billed monthly).
- Only Collabora Online lists Linux, iOS and Android apps.
- Only Slab lists a browser extension.
- Collabora Online is open source and self-hostable, according to its own site.
- Free plan · from €5/mo
CryptPad
End-to-end encrypted, open-source collaborative office suite
- CryptPad starts at €5 per month, or €55 per year, for the Personal plan on cryptpad.fr. Slab starts at $6.67 per user / month, billed annually ($8 billed monthly).
- Only Slab lists macOS and Windows apps.
- Only Slab lists a browser extension.
- CryptPad is open source, self-hostable and end-to-end encrypted, according to its own site.
- Free plan · from $20/mo
Gramax
Open-source knowledge base that stores Markdown in Git
- Gramax starts at $20 per Editor license / month, minimum 10 licenses (Enterprise Server). Slab starts at $6.67 per user / month, billed annually ($8 billed monthly).
- Only Gramax lists a Linux app.
- Only Slab lists a browser extension.
- Gramax is open source and self-hostable, according to its own site.
Common questions
Is there an open-source alternative to Slab?
Yes. Outline, Documize, BookStack, Docmost, ONLYOFFICE, Etherpad, BlueSpice, Wiki.js and 7 more are open source, according to their own sites.
Is Slab open source?
Slab is not described as open source on its own site. The listing was checked on Oct 5, 2026 against the pages it cites.
When was this checked?
Each listing shows its own date. On this page they run from Oct 5, 2026 to Oct 9, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.
This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to Slab: the alternatives its listing names first, then the tools that share the most features with it.