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Web Development · head to head

shadcn/ui vs Weka

shadcn/ui logo

shadcn/ui

Web Development

Copy-paste React components you own, not a dependency

From
Free
Rated
-
Full reviewWebsite
Weka logo

Weka

Machine Learning

Collection of machine learning algorithms

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: shadcn/ui no upgrade path: once copied, upstream fixes and improvements are yours to port by hand; Weka the package management system needs an internet connection to download and install packages, so an air-gapped install gets only the core distribution
  • They diverge on capability: shadcn/ui covers Copy, not install, Weka covers Classification.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which shadcn/ui and Weka actually diverge.

Attributes where shadcn/ui and Weka differ
Attributeshadcn/uiWeka
Pricing modelOpen source, no licence feeopen-source
PlatformsWebLinux, Mac, Windows
CategoryWeb DevelopmentMachine Learning
FoundedUnknown1993

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 shadcn/ui

  • Copy, not install
  • Radix primitives
  • Tailwind styling
  • Themeable

Only in Weka

  • Classification
  • Regression
  • Clustering
  • Association rules
  • Feature selection
  • Java
  • R
  • Python

What people use each for

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

shadcn/ui

  • Projects already using Tailwind that need accessible components without a theming fightnot Weka
  • Design systems that will diverge from any library’s defaults anywaynot Weka
  • Teams who have been burned by breaking changes in component library upgradesnot Weka

Weka

  • Teaching and exploring classic machine learning algorithms through a GUInot shadcn/ui
  • Running data mining experiments and preprocessing without writing codenot shadcn/ui

Where each one falls short

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

shadcn/ui

  • No upgrade path: once copied, upstream fixes and improvements are yours to port by hand
  • Requires Tailwind and React, so it is not an option outside that stack
  • Component code lives in your repository, which grows it and puts maintenance on your team
  • Its popularity has made the default look recognisable, which undercuts the customisation argument

Weka

  • The package management system needs an internet connection to download and install packages, so an air-gapped install gets only the core distribution
  • Weka is split into a stable 3.8 branch that receives only bug fixes and compatibility-safe upgrades and a 3.9 development branch that may receive features that break compatibility
  • Weka requires a 64-bit Java VM; the bundled installers ship Bellsoft OpenJDK 25 per platform and architecture

Pricing, plan by plan

shadcn/ui

Free
  • shadcn/uiFree
    • Full functionality
    • Commercial use permitted
    • Community support

Weka

Free
  • Open SourceFree
    • All ML algorithms
    • GUI and CLI
    • Java API

Which should you pick?

Choose shadcn/ui if

  • You need copy, not install.
  • You want to start without paying.
  • You also want radix primitives.
shadcn/ui review

Choose Weka if

  • You need classification.
  • You want to start without paying.
  • You work on Linux, Mac, Windows.
  • You also want regression.
Weka review

Questions people ask

Is shadcn/ui or Weka better?
Neither clearly leads. shadcn/ui starts at Free and Weka at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, shadcn/ui or Weka?
shadcn/ui starts at Free and Weka at Free.
Does shadcn/ui or Weka run on more platforms?
shadcn/ui runs on Web. Weka runs on Linux, Mac, Windows.
Can I use shadcn/ui for free?
Both have a free tier, so you can try either at no cost before committing.
What is shadcn/ui best used for?
shadcn/ui is most often used for projects already using tailwind that need accessible components without a theming fight, design systems that will diverge from any library’s defaults anyway, teams who have been burned by breaking changes in component library upgrades. Of those, projects already using tailwind that need accessible components without a theming fight and design systems that will diverge from any library’s defaults anyway are not what Weka is typically brought in for.
What can shadcn/ui do that Weka cannot?
shadcn/ui covers Copy, not install, Radix primitives, Tailwind styling, Themeable. Weka covers Classification, Regression, Clustering, Association rules.

Answered from the vendors’ own pages

shadcn/ui: Is shadcn/ui free?

Yes, open source and free for commercial use.

Weka: What is the cost of Weka software?

Weka is provided at no cost as open-source software released under the GNU General Public License, making it freely available for download and use.

Source
shadcn/ui: Why is it not an npm package?

So you own the code. Components are copied into your project, which makes customisation trivial — at the cost of receiving no automatic updates.

Weka: Are there commercial licensing options available?

Yes, the project offers information about commercial licenses for organizations requiring non-GPL terms, which can be found in their commercial applications documentation.

Source
shadcn/ui: Do I need Tailwind?

Yes. Components are styled with Tailwind utility classes and built on Radix primitives, so both are required.

Weka: What support resources are available to users?

Multiple support avenues exist including comprehensive documentation, frequently asked questions, dedicated help resources, and access to courses for learning the platform.

Source
Weka: Is source code access provided?

Yes, developers have full access to source code through the Git repository, along with development documentation and code credits for contributors.

Source
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