Documentation · head to head
Read the Docs vs Sakai
Read the Docs
Documentation
Documentation hosting with versioning built for open source
- From
- Free
- Rated
- -
Sakai
LMS
Open source learning management system governed by the Apereo Foundation
- From
- Free
- Rated
- -
The short version
- Each has a real cost: Read the Docs build configuration is finicky, and build failures on dependency changes are a common frustration; Sakai the zero licence fee is misleading: running Sakai needs Java operations, database administration and upgrade testing capacity, and universities that costed only the hardware have ended up paying a hosting partner anyway.
- They diverge on capability: Read the Docs covers Build on commit, Sakai covers Course sites.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which Read the Docs and Sakai actually diverge.
| Attribute | Read the Docs | Sakai |
|---|---|---|
| Pricing model | Free for open source; paid business plans for private documentation | Open source, no licence fee |
| Platforms | Web, Cloud | Web, Linux, iOS, Android |
| Category | Documentation | LMS |
Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).
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 Read the Docs
- Build on commit
- Version by branch and tag
- Pull request previews
- Free for open source
Only in Sakai
- Course sites
- Tests and Quizzes
- Gradebook
- Lessons
- Assignments
- Forums and messaging
- LTI support
- Self-hosting
What people use each for
The jobs each tool is most often brought in to do.
Read the Docs
- Open-source projects needing free hosted versioned documentationnot Sakai
- Teams wanting docs rebuilt automatically on every commitnot Sakai
- Reviewing documentation changes in a pull request before mergenot Sakai
Sakai
- A university whose data protection policy or national regulation requires student coursework to stay on institution-controlled infrastructure inside a specific jurisdiction.not Read the Docs
- An institution that has been repriced twice by a commercial LMS vendor after ownership changes and wants a platform with no owner to sell it.not Read the Docs
- A university with an existing Java and Tomcat operations team, where the marginal cost of running one more Java application is genuinely low.not Read the Docs
- A consortium of institutions sharing one deployment and one set of local integrations rather than each paying separate per-student licences.not Read the Docs
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Read the Docs
- Build configuration is finicky, and build failures on dependency changes are a common frustration
- Default themes are recognisable and dated, so sites look alike unless customised
- Private documentation requires a paid business plan
- Build times on large projects are slow enough to interrupt a review cycle
Sakai
- The zero licence fee is misleading: running Sakai needs Java operations, database administration and upgrade testing capacity, and universities that costed only the hardware have ended up paying a hosting partner anyway.
- The third-party teaching tool ecosystem builds and tests for Canvas first, so Sakai adopters do their own LTI integration work and occasionally wait for a vendor to certify against a platform it does not prioritise.
- Because governance is a foundation of member institutions rather than a company, a feature only gets built if some institution funds an engineer to build it, so roadmap commitments are weaker than a vendor contract provides.
- The interface, while improved through the version 20 to 25 cycle, still reads as older than Canvas or Brightspace, and academic staff who have used a commercial LMS elsewhere notice it immediately.
- Adoption is concentrated in specific regions and sectors, so the pool of people who have run Sakai in production is small, making it harder to hire an administrator than for Moodle or Canvas.
Pricing, plan by plan
Read the Docs
Free- FreeFree
- Core functionality
- Public projects
Sakai
Free- SakaiFree
- Educational Community Licence, no licence fee
- Full source on GitHub
- Community support through Apereo lists and Jira
- Commercial hosting and support$undefined/year
- Provided by Apereo affiliates such as Longsight
- Hosting, upgrades, backups and support
- Quoted per institution, commonly by student headcount
Which should you pick?
Choose Read the Docs if
- You need build on commit.
- You want to start without paying.
- You work on Web, Cloud.
- You also want version by branch and tag.
Choose Sakai if
- You need course sites.
- You want to start without paying.
- You work on Web, Linux, iOS, Android.
- You also want tests and quizzes.
Questions people ask
- Is Read the Docs or Sakai better?
- Neither clearly leads. Read the Docs starts at Free and Sakai at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Read the Docs or Sakai?
- Read the Docs starts at Free and Sakai at Free.
- Does Read the Docs or Sakai run on more platforms?
- Read the Docs runs on Web, Cloud. Sakai runs on Web, Linux, iOS, Android.
- Can I use Read the Docs for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Read the Docs best used for?
- Read the Docs is most often used for open-source projects needing free hosted versioned documentation, teams wanting docs rebuilt automatically on every commit, reviewing documentation changes in a pull request before merge. Of those, open-source projects needing free hosted versioned documentation and teams wanting docs rebuilt automatically on every commit are not what Sakai is typically brought in for.
- What can Read the Docs do that Sakai cannot?
- Read the Docs covers Build on commit, Version by branch and tag, Pull request previews, Free for open source. Sakai covers Course sites, Tests and Quizzes, Gradebook, Lessons.
Answered from the vendors’ own pages
Read the Docs: Is Read the Docs free?
Free for open-source public projects. Private documentation requires a paid business plan.
Sakai: Is Sakai still actively developed?
Yes. Version 25.0 shipped in 2025, 25.1 followed in November 2025, and further maintenance releases in the 25 line are planned, with commits continuing through 2026.
Read the Docs: What does it build from?
Most commonly Sphinx or MkDocs sources kept in your repository.
Sakai: Who owns Sakai?
No company does. Governance sits with the Apereo Foundation, a membership organisation of institutions, and the code is under the Educational Community Licence.
Read the Docs: How does versioning work?
It maps branches and tags to documentation versions, so several releases are served side by side without manual work.
Sakai: What does it actually cost to run?
The software is free. The cost is Java hosting and staff, or a commercial hosting agreement with an Apereo affiliate such as Longsight, typically quoted by student headcount.
Sakai: How does it compare to Moodle?
Moodle has a far larger plugin ecosystem and installed base; Sakai has a cleaner assessment and gradebook model and is more common in research-intensive universities. Moodle is easier to hire for.
Sakai: Can we migrate off it later?
Yes, but course content export fidelity through Common Cartridge is imperfect, so budget for manual rebuilding of assessments as you would leaving any LMS.
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- Sakai vs Sphinx
- Sakai vs Docsify
- Sakai vs GitBook
- Sakai vs Doxygen
- Sakai vs BookStack
- Sakai vs Antora
- Sakai vs Outline
- Sakai vs Bump.sh
- Sakai vs Fumadocs
- Sakai vs Scalar
- Sakai vs Grammarly
- Sakai vs Slab
- Sakai vs Starlight
- Sakai vs VitePress
- Sakai vs Guidde
- Sakai vs Canvas
- Sakai vs Claroline
- Sakai vs Moodle
- Sakai vs Chamilo
- Sakai vs Totara
- Sakai vs CYPHER Learning
- Sakai vs LearnUpon
- Sakai vs Skilljar
- Sakai vs Echo360
- Sakai vs Thought Industries
- Sakai vs Tovuti LMS
- Sakai vs Google Classroom
- Sakai vs Degreed
- Sakai vs Edmodo
- Sakai vs Edpuzzle
- Sakai vs iSpring Learn
- Sakai vs LearnDash