CouchDB free also for businesses? [closed]

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Often you can use open source projects for free as long as you don't earn money yourself. In that moment you often need to purchase another license in exchange for cash, naming mySQL as an example. But I can't find any information like that about couchDB. So I wonder if it is totally for free, even if you build a business onto it. Can you confirm that?

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Check out the Licenses link on the Apache Couch DB site, which links to the main Apache license site.

In general, the Apache licenses are pretty open and allow you to do just about whatever you want with them, provided that you attribute the original work you use to Apache, distribute the license when you distribute any Apache projects, and note any modifications you made.

To determine what the License means for your specific use, please contact a friendly lawyer to advise you on legal issues.

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CouchDB, like all Apache projects, is licensed under The Apache License which permits all uses, including commercial ones. You most certainly do not have to pay anything to use CouchDB.

http://www.apache.org/licenses/LICENSE-2.0

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Your example about MySQL is incorrect. You are free to use the open-source version of MySQL even in a commercial environment. It is true that there is a paid for version if you want extra features or support but like CouchDB there is no restriction on using MySQL in a commercial environment.