Extensible Licensing Overview

Extensible uses the same dual licensing model used by Sencha for Ext JS. We have both open source and commercial license options available.

Commercial License

This is the appropriate option if you are creating proprietary applications and you are not prepared to distribute and share the source code of your application under the GPL.

If you wish to derive a commercial advantage by not releasing your application under an open source license, you must purchase an appropriate number of commercial licenses from Extensible. By purchasing commercial licenses, you are no longer obligated to publish your source code.

Commercial licenses:

  • Are on a per developer basis. Each person who directly or indirectly creates an application or user interface containing Extensible components is considered a developer.
  • Are perpetual and include upgrades to all minor revisions. For example, a 1.0 license includes all minor 1.x releases including 1.1, 1.2, etc.
  • Are royalty-free and allow unlimited server distribution.
  • Remove any obligations to release any source code under the GPL.

Open Source License

Extensible is an avid supporter of open source software. This is the appropriate option if you are creating an open source application with a license compatible with the GNU GPL license v3. If this applies to you then nothing else is required — simply download Extensible and start unsing it.

For more information about the GPL and its applicability to your application read Sencha's GPL overview. When in doubt, we will generally defer to Sencha's open source usage policies.

Note that if you are using Extensible under the GPL and you'd still like to support us financially, a good option would be to purchase a support subscription.

Still Have Questions?

We are very aware that licensing can sometimes be a confusing business. If you still have any questions, or would like to inquire about OEM or other custom licensing arrangements, please don't hesitate to contact us.