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Developer Tools · head to head

Eclipse IDE vs Keil MDK

Eclipse IDE logo

Eclipse IDE

Developer Tools

Open-source, extensible IDE historically centered on Java development

From
Free
Rated
-
Full reviewWebsite
Keil MDK logo

Keil MDK

Developer Tools

Microcontroller Development Kit for Arm-based devices

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Eclipse IDE startup time and UI responsiveness lag behind newer editors like VS Code.; Keil MDK pricing for Essential and Professional subscriptions not disclosed on primary site
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Eclipse IDE and Keil MDK actually diverge.

Attributes where Eclipse IDE and Keil MDK differ
AttributeEclipse IDEKeil MDK
Pricing modelopen-sourcefreemium
Platformswindows, mac, linuxWeb
Founded2001Unknown

Identical on both: starting price (Free), free tier (Yes), 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 Keil MDK

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 Keil MDK
  • Academic and educational programming coursesnot Keil MDK
  • Extending the IDE for niche languages via pluginsnot Keil MDK
  • Multi-module builds with Maven or Gradlenot Keil MDK

Keil MDK

  • Embedded software developmentnot Eclipse IDE
  • ARM microcontroller programmingnot Eclipse IDE
  • Professional development environmentsnot 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.

Keil MDK

  • Pricing for Essential and Professional subscriptions not disclosed on primary site
  • Customers must contact Arm Developer Tools store for subscription rates

Pricing, plan by plan

Eclipse IDE

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

Keil MDK

Free

No published plan breakdown. See the Keil MDK 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 Keil MDK if

  • You want to start without paying.
Keil MDK review

Questions people ask

Is Eclipse IDE or Keil MDK better?
Neither clearly leads. Eclipse IDE starts at Free and Keil MDK at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Eclipse IDE or Keil MDK?
Eclipse IDE starts at Free and Keil MDK at Free.
Does Eclipse IDE or Keil MDK run on more platforms?
Eclipse IDE runs on windows, mac, linux. Keil MDK runs on Web.
Can I use Eclipse IDE for free?
Both have a free tier, so you can try either at no cost before committing.
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 Keil MDK is typically brought in for.
What can Eclipse IDE do that Keil MDK 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
Keil MDK: Does Keil MDK have a free version?

Yes, Keil MDK Community Edition is free for non-commercial projects. Essential and Professional editions are available as monthly or annual subscriptions.

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
Keil MDK: How much do Keil MDK paid editions cost?

Specific pricing for Essential and Professional editions is not published on the main site. Rates are available from the Arm Developer Tools store or by contacting Arm sales.

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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