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JetBrains IntelliJ IDEA vs Weka

JetBrains IntelliJ IDEA logo

JetBrains IntelliJ IDEA

Technology

The Leading Java and Kotlin IDE

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: JetBrains IntelliJ IDEA high memory consumption and slower startup time compared to lightweight editors like Visual Studio Code; 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: JetBrains IntelliJ IDEA covers Smart code completion, Weka covers Classification.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which JetBrains IntelliJ IDEA and Weka actually diverge.

Attributes where JetBrains IntelliJ IDEA and Weka differ
AttributeJetBrains IntelliJ IDEAWeka
Pricing modelUnknownopen-source
PlatformsmacOS, Windows, LinuxLinux, Mac, Windows
CategoryTechnologyMachine Learning
Founded20001993

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 JetBrains IntelliJ IDEA

  • Smart code completion
  • Framework support
  • Refactoring tools
  • Debugging & profiling
  • Version control
  • Database tools
  • Build tools
  • Testing frameworks

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.

JetBrains IntelliJ IDEA

  • Enterprise Java developmentnot Weka
  • Spring applicationsnot Weka
  • Android appsnot Weka
  • Web applicationsnot Weka
  • Microservicesnot Weka

Weka

  • Teaching and exploring classic machine learning algorithms through a GUInot JetBrains IntelliJ IDEA
  • Running data mining experiments and preprocessing without writing codenot JetBrains IntelliJ IDEA

Where each one falls short

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

JetBrains IntelliJ IDEA

  • High memory consumption and slower startup time compared to lightweight editors like Visual Studio Code
  • Refactoring can sometimes increase code line count and doesn't effectively support all modern programming languages
  • Occasionally misses dependencies between files requiring full rebuilds for consistency
  • Expensive subscription costs for Ultimate edition compared to open-source alternatives like Eclipse
  • Not all class name references are updated reliably when using search and replace functionality

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

JetBrains IntelliJ IDEA

Free
  • Community EditionFree
    • Java, Kotlin, Scala development
    • Python, Go, Rust, PHP, Ruby support
    • Spring Boot integration
  • Ultimate (Individual)$19.9/month
    • All Community Edition features
    • Advanced web development tools
    • JavaScript, TypeScript, React support
  • All Products Pack (Individual)$29.9/month
    • IntelliJ IDEA Ultimate
    • PyCharm Professional
    • WebStorm

Weka

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

Which should you pick?

Choose JetBrains IntelliJ IDEA if

  • You need smart code completion.
  • You want to start without paying.
  • You work on macOS, Windows, Linux.
  • You also want framework support.
JetBrains IntelliJ IDEA 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 JetBrains IntelliJ IDEA or Weka better?
Neither clearly leads. JetBrains IntelliJ IDEA 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, JetBrains IntelliJ IDEA or Weka?
JetBrains IntelliJ IDEA starts at Free and Weka at Free.
Does JetBrains IntelliJ IDEA or Weka run on more platforms?
JetBrains IntelliJ IDEA runs on macOS, Windows, Linux. Weka runs on Linux, Mac, Windows.
Can I use JetBrains IntelliJ IDEA for free?
Both have a free tier, so you can try either at no cost before committing.
What is JetBrains IntelliJ IDEA best used for?
JetBrains IntelliJ IDEA is most often used for enterprise java development, spring applications, android apps, web applications. Of those, enterprise java development and spring applications are not what Weka is typically brought in for.
What can JetBrains IntelliJ IDEA do that Weka cannot?
JetBrains IntelliJ IDEA covers Smart code completion, Framework support, Refactoring tools, Debugging & profiling. Weka covers Classification, Regression, Clustering, Association rules.

Answered from the vendors’ own pages

JetBrains IntelliJ IDEA: Is there a free version of IntelliJ IDEA?

Yes, IntelliJ IDEA Community Edition is completely free for personal, educational, and commercial use. As of IntelliJ IDEA 2025.3, the Community Edition has been unified with Ultimate, maintaining all core functionality free including Java, Kotlin, Scala, Python, Go, Rust, PHP, and Ruby support.

Source
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
JetBrains IntelliJ IDEA: What programming languages does IntelliJ IDEA support?

IntelliJ IDEA supports Java, Kotlin, Scala, Python, Go, Rust, PHP, Ruby, JavaScript, TypeScript, and more. The free Community Edition includes support for all major languages with new features in Spring, Jakarta EE, Thymeleaf, and other frameworks.

Source
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
JetBrains IntelliJ IDEA: Can I use IntelliJ IDEA with Spring Boot?

Yes, IntelliJ IDEA has built-in Spring Boot integration including the Spring Initializr project wizard, automatic dependency management with Maven and Gradle, code inspections for Spring frameworks, and direct project creation from Spring Initializr.

Source
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
JetBrains IntelliJ IDEA: Does IntelliJ IDEA support Git version control?

Yes, IntelliJ IDEA includes comprehensive Git integration allowing users to create Git repositories, commit changes, push to GitHub, create and merge branches, resolve conflicts, and investigate file history directly from the IDE.

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
JetBrains IntelliJ IDEA: How much does IntelliJ IDEA Ultimate cost?

IntelliJ IDEA Ultimate subscription starts at $19.90 per month for Individual plans or $29.90 for the All Products Pack. Long-term discounts apply: 20% off year 2 and 40% off year 3 and beyond, reducing the annual cost significantly for loyal users.

Source
JetBrains IntelliJ IDEA: What are the main differences between IntelliJ IDEA and Eclipse?

IntelliJ IDEA offers a cleaner UI and more powerful code assistance capabilities compared to Eclipse's more complex interface. IntelliJ provides better refactoring tools, superior code completion, and optimized performance, while Eclipse remains free and open-source with a larger plugin ecosystem.

Source
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