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LMS · head to head

Sakai vs Violentmonkey

Sakai logo

Sakai

LMS

Open source learning management system governed by the Apereo Foundation

From
Free
Rated
-
Full reviewWebsite
Violentmonkey logo

Violentmonkey

Browser Extensions

Open source userscript manager

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: 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.; Violentmonkey smaller script ecosystem compared to Tampermonkey which has larger user base and more available scripts
  • They diverge on capability: Sakai covers Course sites, Violentmonkey covers Userscript support.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Sakai and Violentmonkey actually diverge.

Attributes where Sakai and Violentmonkey differ
AttributeSakaiViolentmonkey
Pricing modelOpen source, no licence feeUnknown
PlatformsWeb, Linux, iOS, AndroidChrome, Firefox, Edge
CategoryLMSBrowser Extensions
FoundedUnknown2013

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 Sakai

  • Course sites
  • Tests and Quizzes
  • Gradebook
  • Lessons
  • Assignments
  • Forums and messaging
  • LTI support
  • Self-hosting

Only in Violentmonkey

  • Userscript support
  • Clean interface
  • Cloud sync
  • Script editor
  • Chrome support
  • Firefox support
  • Edge support
  • Opera support

What people use each for

The jobs each tool is most often brought in to do.

Sakai

  • A university whose data protection policy or national regulation requires student coursework to stay on institution-controlled infrastructure inside a specific jurisdiction.not Violentmonkey
  • 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 Violentmonkey
  • A university with an existing Java and Tomcat operations team, where the marginal cost of running one more Java application is genuinely low.not Violentmonkey
  • A consortium of institutions sharing one deployment and one set of local integrations rather than each paying separate per-student licences.not Violentmonkey

Violentmonkey

  • Run open-source userscripts to customize or automate web pagesnot Sakai
  • Import scripts compatible with Greasemonkey and Tampermonkey formatsnot Sakai
  • Sync scripts and settings across browsers via Dropbox, OneDrive, Google Drive, or WebDAVnot Sakai
  • Batch import/export scripts as zip filesnot Sakai

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

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.

Violentmonkey

  • Smaller script ecosystem compared to Tampermonkey which has larger user base and more available scripts
  • Less marketing and visibility results in lower adoption compared to more widely-known alternatives
  • Community maintenance model means slower feature development compared to commercial alternatives

Pricing, plan by plan

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

Violentmonkey

Free

No published plan breakdown. See the Violentmonkey review.

Which should you pick?

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.
Sakai review

Choose Violentmonkey if

  • You need userscript support.
  • You want to start without paying.
  • You work on Chrome, Firefox, Edge.
  • You also want clean interface.
Violentmonkey review

Questions people ask

Is Sakai or Violentmonkey better?
Neither clearly leads. Sakai starts at Free and Violentmonkey at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Sakai or Violentmonkey?
Sakai starts at Free and Violentmonkey at Free.
Does Sakai or Violentmonkey run on more platforms?
Sakai runs on Web, Linux, iOS, Android. Violentmonkey runs on Chrome, Firefox, Edge.
Can I use Sakai for free?
Both have a free tier, so you can try either at no cost before committing.
What is Sakai best used for?
Sakai is most often used for a university whose data protection policy or national regulation requires student coursework to stay on institution-controlled infrastructure inside a specific jurisdiction., 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., a university with an existing java and tomcat operations team, where the marginal cost of running one more java application is genuinely low., a consortium of institutions sharing one deployment and one set of local integrations rather than each paying separate per-student licences.. Of those, a university whose data protection policy or national regulation requires student coursework to stay on institution-controlled infrastructure inside a specific jurisdiction. and 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. are not what Violentmonkey is typically brought in for.
What can Sakai do that Violentmonkey cannot?
Sakai covers Course sites, Tests and Quizzes, Gradebook, Lessons. Violentmonkey covers Userscript support, Clean interface, Cloud sync, Script editor.

Answered from the vendors’ own pages

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.

Violentmonkey: Is Violentmonkey open-source?

Yes. Violentmonkey is fully open-source and available on GitHub, making it free to use and community-maintained unlike Tampermonkey which has a larger proprietary ecosystem.

Source
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.

Violentmonkey: What browsers does Violentmonkey support?

Violentmonkey works on browsers with WebExtensions support, including Chrome, Firefox, Edge, and other Chromium-based browsers.

Source
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.

Violentmonkey: How does Violentmonkey compare to Tampermonkey in performance?

Community benchmarks show Violentmonkey uses about 15 to 30 percent less RAM on Chrome compared to Tampermonkey when managing many open tabs.

Source
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.

Violentmonkey: What is the current version of Violentmonkey?

Violentmonkey reached version 2.46.0 as of July 31, 2026, with active ongoing development and regular updates to the open-source project.

Source
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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