https://techcrunch.com/2018/10/16/mongodb-switches-up-its-open-source-license/

MongoDB is a bit miffed that some cloud providers — especially in Asia — are taking its open source code and are offering a hosted commercial version of its database to their users without playing by the open source rules. To combat this, MongoDB today announced that it has issued a new software license, the Server Side Public License (SSPL), that will apply to all new releases of its MongoDB Community Server, as well as all patch fixes for prior versions.

Previously, MongoDB used the GNU APGLv3 license, but it has now submitted the SSPL for approval from the Open Source Initiative.