Oracle Berkeley DB Licensing Information
Oracle employs a dual licensing model that offers customers a choice of either our open source license or a commercial license. Our open source license is OSI-certified and permits use of Berkeley DB in open source projects or in applications that are not distributed to third parties.
Our commercial license permits closed-source distribution of an application to third parties and provides business assurance. Please address your request for commercial licensing to email@example.com.
For more details please see here: https://www.oracle.com/database/technologies/related/berkeleydb/berkeleydb-licensing.html.