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Developer Tools · head to head

Eclipse IDE vs GNAT Pro

Eclipse IDE logo

Eclipse IDE

Developer Tools

Open-source, extensible IDE historically centered on Java development

From
Free
Rated
-
Full reviewWebsite
GNAT Pro logo

GNAT Pro

Developer Tools

Software development environments and toolchains for Ada, C/C++ and Rust

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Eclipse IDE has a free tier, so it costs nothing to try first.
  • Each has a real cost: Eclipse IDE startup time and UI responsiveness lag behind newer editors like VS Code.; GNAT Pro no pricing published on website; requires contacting AdaCore directly for quotes
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Eclipse IDE and GNAT Pro actually diverge.

Attributes where Eclipse IDE and GNAT Pro differ
AttributeEclipse IDEGNAT Pro
Starting priceFreeOn request
Pricing modelopen-sourcequote
Free tierYesNo
Platformswindows, mac, linuxWeb
Founded2001Unknown

Identical on both: user rating (Not yet rated), category (Developer Tools).

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 IDE

  • Java Development Tools (JDT)
  • Plugin Architecture
  • Git Integration
  • Refactoring Tools
  • Workspace and Project Management

Only in GNAT Pro

Nothing recorded that Eclipse IDE does not also cover.

What people use each for

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

Eclipse IDE

  • Enterprise Java application developmentnot GNAT Pro
  • Academic and educational programming coursesnot GNAT Pro
  • Extending the IDE for niche languages via pluginsnot GNAT Pro
  • Multi-module builds with Maven or Gradlenot GNAT Pro

GNAT Pro

  • Building certified avionics software meeting DO-178B/C standardsnot Eclipse IDE
  • Developing automotive embedded systems with ISO-26262 compliancenot Eclipse IDE
  • Integrating Ada, C/C++, and Rust components in single codebasenot Eclipse IDE
  • Managing software supply chain vulnerabilities and SBOMsnot Eclipse IDE
  • Supporting long-lived software systems spanning decadesnot Eclipse IDE

Where each one falls short

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

Eclipse IDE

  • Startup time and UI responsiveness lag behind newer editors like VS Code.
  • Plugin quality and compatibility can be inconsistent across versions.
  • Modern language support (e.g. for web frameworks) is weaker than dedicated tools.
  • Configuration and workspace setup has a steeper learning curve for newcomers.

GNAT Pro

  • No pricing published on website; requires contacting AdaCore directly for quotes
  • Vendor indicates per-user, per-year subscription model but does not disclose specific costs

Pricing, plan by plan

Eclipse IDE

Free
  • FreeFree
    • Full IDE and plugin ecosystem, no paid tiers

GNAT Pro

On request

No published plan breakdown. See the GNAT Pro review.

Which should you pick?

Choose Eclipse IDE if

  • You need java development tools (jdt).
  • You want to start without paying.
  • You work on windows, mac, linux.
  • You also want plugin architecture.
Eclipse IDE review

Choose GNAT Pro if

Nothing in the data separates GNAT Pro from Eclipse IDE on the points above - pick on price and on how each one feels to use.

GNAT Pro review

Questions people ask

Is Eclipse IDE or GNAT Pro better?
Neither clearly leads. Eclipse IDE starts at Free and GNAT Pro at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Eclipse IDE or GNAT Pro?
Eclipse IDE has a free tier; the other does not. Paid plans start at Free for Eclipse IDE and On request for GNAT Pro.
Does Eclipse IDE or GNAT Pro run on more platforms?
Eclipse IDE runs on windows, mac, linux. GNAT Pro runs on Web.
Can I use Eclipse IDE for free?
Yes. Eclipse IDE has a free tier, so you can try it without paying. GNAT Pro starts at On request.
What is Eclipse IDE best used for?
Eclipse IDE is most often used for enterprise java application development, academic and educational programming courses, extending the ide for niche languages via plugins, multi-module builds with maven or gradle. Of those, enterprise java application development and academic and educational programming courses are not what GNAT Pro is typically brought in for.
What can Eclipse IDE do that GNAT Pro cannot?
Eclipse IDE covers Java Development Tools (JDT), Plugin Architecture, Git Integration, Refactoring Tools.

Answered from the vendors’ own pages

Eclipse IDE: Is Eclipse IDE free to use, including commercially?

Yes, Eclipse is released under the Eclipse Public License 2.0, a free and open-source license that permits commercial use with no purchase required.

Source
GNAT Pro: How much does GNAT Pro cost?

GNAT Pro pricing is not published on the website. Customers must request a pricing quote by contacting AdaCore directly or speaking with a GNAT Pro expert.

Source
Eclipse IDE: How do I extend Eclipse with plugins?

Extensions are installed from the Eclipse Marketplace, which hosts over 1,300 solutions spanning tools, languages, IoT support, and RCP applications, using drag-and-drop installation via the Marketplace Client.

Source
GNAT Pro: What is GNAT Pro licensing model?

GNAT Pro is sold on a per-user, per-year basis with no license locks. Customers can request pricing for their specific needs.

Source
Eclipse IDE: What license do Eclipse Marketplace plugins use?

Marketplace listings can be filtered by license type, including EPL, GPL, Apache 2.0, and MIT, since individual plugin authors choose their own licensing terms.

Source
Eclipse IDE: Where can I get help with Eclipse?

Support channels include community forums, project office hours, and a contact page maintained by the Eclipse Foundation, in addition to the official Eclipse Platform help documentation.

Source
Eclipse IDE: Is Eclipse limited to Java development?

No, while Eclipse's Java Development Tools are its best-known feature, the plugin architecture and marketplace extend it to C/C++, PHP, JavaScript, and many other languages.

Source
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