Can I use ExtJs without License like JQuery? Can I publish website using ExtJS without any permission from them?
+1
A:
No, you would need a commercial license unless you are releasing the source code of your application with a license compatible with GPLv3. (ExtJS - Licensing Overview)
Currently a single developer license which allows you to deploy Ext JS on unlimited domains and sub-domains on unlimited servers costs $329. (ExtJS - Online Store)
ExtJS uses a Dual License business model for its software development libraries. Basically you are required to contribute either by purchasing a commercial license, or by placing your application under an open source license compatible with GPLv3. By purchasing a commercial license, you will no longer be obligated to publish your source code.
Daniel Vassallo
2010-02-10 08:58:15
It depends on what he's doing with that website.
Jonathan Julian
2010-02-10 15:31:52
@Jonathan: It looks like it doesn't depend on what you do with the website: http://www.extjs.com/company/dual.php. You would have to open-source your application, or else purchase a commercial license. "By purchasing commercial licenses, you are no longer obligated to publish your source code."
Daniel Vassallo
2010-02-10 15:55:09
Yup - if he is building a commercial app, he needs to buy a license, else open source the app. It sucks that they use GPL, but think about the *spirit* of their dual-license: if you are making money, pay Ext JS. If not, then provide your source for everyone else to see.
Jonathan Julian
2010-02-10 19:19:52
Daniel, I've been following ExtJS site for a while now and never have I read that the commercial license is available at $329. Today it stands at $729 after 20% discount! (although it includes Silver Support worth $299). Then too the cost is not what you've stated. If I'm wrong, can you please clarify?
Kabeer
2010-05-22 07:47:43
@Kabeer: This is what I see: http://img143.imageshack.us/img143/3673/extextjsstore.jpg
Daniel Vassallo
2010-05-22 08:35:35
+2
A:
ExtJS is available under both GPL v3 for open source projects and under a commercial license for proprietary applications. The license terms for ExtJS can be found here; have a look at that page for details.
That said, I'm not a lawyer, and if you're unsure about what's ok in your particular situation, you should seek legal advice from a professional.
Pär Wieslander
2010-02-10 08:58:48