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Technology · head to head

Eclipse vs Ray

Eclipse logo

Eclipse

Technology

The Eclipse Foundation - home to a global community

From
Free
Rated
-
Full reviewWebsite
Ray logo

Ray

Machine Learning

Scale AI and Python applications

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Eclipse high memory consumption and CPU usage, especially with multiple plugins installed; Ray windows support is beta and multi node Ray clusters are untested on Windows
  • They diverge on capability: Eclipse covers Java development environment, Ray covers Distributed computing.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Eclipse and Ray actually diverge.

Attributes where Eclipse and Ray differ
AttributeEclipseRay
Pricing modelUnknownfreemium
PlatformsWindows, macOS, LinuxLinux, Mac, Windows
CategoryTechnologyMachine Learning
Founded20012019

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 Eclipse

  • Java development environment
  • Extensible plugin architecture
  • Integrated debugger
  • Code refactoring
  • Version control integration
  • Build automation
  • Multi-language support
  • Rich client platform

Only in Ray

  • Distributed computing
  • Ray Train
  • Ray Tune
  • RLlib
  • Ray Serve
  • PyTorch
  • TensorFlow
  • Hugging Face

Both cover

  • Windows support

What people use each for

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

Eclipse

  • Java application developmentnot Ray
  • Enterprise software developmentnot Ray
  • Web application developmentnot Ray
  • Plugin developmentnot Ray
  • Educational programmingnot Ray

Ray

  • Distributed AI model training and servingnot Eclipse
  • Large-scale data processingnot Eclipse
  • Reinforcement learning workloadsnot Eclipse
  • ML inference servingnot Eclipse

Where each one falls short

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

Eclipse

  • High memory consumption and CPU usage, especially with multiple plugins installed
  • Slow startup times and performance degradation with large projects or many open editors
  • Requires configuration of eclipse.ini file to optimize heap sizes for adequate performance
  • User interface considered outdated compared to modern IDE alternatives
  • User base fell from 39% of Java developers in 2024 to 28% in 2025, indicating market decline

Ray

  • Windows support is beta and multi node Ray clusters are untested on Windows
  • Windows lacks copy on write forking, which raises memory requirements, and Ray code assumes UNIX filenames
  • Multi node clusters are untested on Apple Silicon Macs
  • The Java API is experimental and community supported only, and requires matching Java and Python versions
  • Python 3.13 support is beta

Pricing, plan by plan

Eclipse

Free

No published plan breakdown. See the Eclipse review.

Ray

Free
  • Open SourceFree
    • Full Ray framework
    • All libraries
    • Community support
  • Anyscale PlatformFree
    • Managed infrastructure
    • Enterprise support
    • SLAs

Which should you pick?

Choose Eclipse if

  • You need java development environment.
  • You want to start without paying.
  • You work on Windows, macOS, Linux.
  • You also want extensible plugin architecture.
Eclipse review

Choose Ray if

  • You need distributed computing.
  • You want to start without paying.
  • You work on Linux, Mac, Windows.
  • You also want ray train.
Ray review

Questions people ask

Is Eclipse or Ray better?
Neither clearly leads. Eclipse starts at Free and Ray at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Eclipse or Ray?
Eclipse starts at Free and Ray at Free.
Does Eclipse or Ray run on more platforms?
Eclipse runs on Windows, macOS, Linux. Ray runs on Linux, Mac, Windows.
Can I use Eclipse for free?
Both have a free tier, so you can try either at no cost before committing.
What is Eclipse best used for?
Eclipse is most often used for java application development, enterprise software development, web application development, plugin development. Of those, java application development and enterprise software development are not what Ray is typically brought in for.
What can Eclipse do that Ray cannot?
Eclipse covers Java development environment, Extensible plugin architecture, Integrated debugger, Code refactoring. Ray covers Distributed computing, Ray Train, Ray Tune, RLlib. Both handle Windows support.

Answered from the vendors’ own pages

Eclipse: How much does Eclipse IDE cost?

Eclipse IDE is completely free and open-source, released under the Eclipse Public License 2.0.

Source
Ray: Is Ray free?

Yes. Ray is free and open source software with over 34,800 GitHub stars and 1,000+ contributors. Users can download and use the Ray framework at no cost.

Source
Ray: Is there a paid option for Ray?

Yes. Anyscale, the managed platform built by Ray's creators, offers paid tiers with enterprise features like governance and advanced tooling. Specific Anyscale pricing details are not listed on the Ray website.

Source
Ray: Can I try Ray with credits?

Yes. New users can try Ray with $100 credit on Anyscale's managed platform to explore the service.

Source
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