> MongoDB switched to an open source model a decade ago ...and then moved back 2 years ago. From the https://github.com/mongodb/mongo/blob/master/README https

> MongoDB switched to an open source model a decade ago ...and then moved back 2 years ago. From the https://github.com/mongodb/mongo/blob/master/README https://github.com/mongodb/mongo/blob/master/README : > MongoDB is free and the source is available. Versions released prior to October 16, 2018 are published under the AGPL. All versions released after October 16, 2018, including patch fixes for prior versions, are published under the Server Side Public License (SSPL) v1. AGPL is open source: https://opensource.org/licenses/AGPL-3.0 https://opensource.org/licenses/AGPL-3.0 SSPLv1 is not listed, and SSPLv2 does not seem to have been approved either at last mention https://opensource.org/LicenseReview122018 https://opensource.org/LicenseReview122018