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Developer Tools · head to head

Eclipse IDE vs Mimecast

Eclipse IDE logo

Eclipse IDE

Developer Tools

Open-source, extensible IDE historically centered on Java development

From
Free
Free plan
Yes
Full reviewWebsite
Mimecast logo

Mimecast

Cybersecurity

Email and collaboration security

From
$4/month
Free plan
No
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.; Mimecast no pricing is published for any product or plan, and every route ends at a quote or demo request
  • They diverge on capability: Eclipse IDE covers Java Development Tools (JDT), Mimecast covers Advanced threat detection.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Eclipse IDE and Mimecast actually diverge.

Attributes where Eclipse IDE and Mimecast differ
AttributeEclipse IDEMimecast
Starting priceFree$4/month
Pricing modelopen-sourcesubscription
Free tierYesNo
Platformswindows, mac, linuxEmail, Cloud, Collaboration
CategoryDeveloper ToolsCybersecurity
Founded20012003

Identical on both: 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 IDE

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

Only in Mimecast

  • Advanced threat detection
  • Secure sharing
  • Email encryption
  • Message tracking
  • Email archiving
  • Legal hold
  • eDiscovery
  • Backup and recovery

What people use each for

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

Eclipse IDE

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

Mimecast

  • Email security filtering against phishing and targeted attacksnot Eclipse IDE
  • Email archiving, continuity and compliance for organisationsnot 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.

Mimecast

  • No pricing is published for any product or plan, and every route ends at a quote or demo request
  • The platform is split into separately sold products for email security, awareness training, data protection and governance
  • Collaboration threat protection, DMARC analysis, incident response and email archiving are all further add ons on top of those

Pricing, plan by plan

Eclipse IDE

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

Mimecast

$4/month
  • Defender$4/month
    • Per user
    • Threat protection
    • Impersonation prevention
  • Archive$3/month
    • Email archiving
    • Legal hold
    • Search & recall
  • Unified$6/month
    • All Defender features
    • All Archive features
    • Backup

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 Mimecast if

  • You need advanced threat detection.
  • You work on Email, Cloud, Collaboration.
  • You also want secure sharing.
Mimecast review

Questions people ask

Is Eclipse IDE or Mimecast better?
Neither clearly leads. Eclipse IDE starts at Free and Mimecast at $4/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Eclipse IDE or Mimecast?
Eclipse IDE has a free tier; the other does not. Paid plans start at Free for Eclipse IDE and $4/month for Mimecast.
Does Eclipse IDE or Mimecast run on more platforms?
Eclipse IDE runs on windows, mac, linux. Mimecast runs on Email, Cloud, Collaboration.
Can I use Eclipse IDE for free?
Yes. Eclipse IDE has a free tier, so you can try it without paying. Mimecast starts at $4/month.
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 Mimecast is typically brought in for.
What can Eclipse IDE do that Mimecast cannot?
Eclipse IDE covers Java Development Tools (JDT), Plugin Architecture, Git Integration, Refactoring Tools. Mimecast covers Advanced threat detection, Secure sharing, Email encryption, Message tracking.

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
Mimecast: How much does Mimecast cost?

Mimecast does not publish pricing on its website. Customers must request a custom quote by contacting the sales team at +1 617 393 7000 or using the Get a Quote button.

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
Mimecast: Is there a free trial of Mimecast?

Mimecast's trial and pricing options are not specified on the public website. Contact sales at +1 617 393 7000 or through their support portal at mimecastsupport.zendesk.com for trial availability.

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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