STSdb is available under several licenses - Open Source licenses (GPL 2 and GPL 3) and a "commercial", closed source license.
Open Source Licenses
The STSdb Open Source Licenses are available under the terms of the GNU Public License 2 or any later version. If you use the GPL license of STSdb, you are forced to release your own product under GPL, and anyone using your software must have access to complete source code, and must be able to modify and redistribute that software to anyone free of charge.
STSdb Commercial License
The STSdb Commercial License allows customers to develop, use and distribute their application under standard commercial terms. By purchasing commercial licenses, you do not longer have to release your application's source code.
Commercial licenses are sold "per developer". If a company has two developers working with STSdb, it has to buy two Commercial Licenses.
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