The Server Side Public License (SSPL) is a very strong copyleft source-available software license introduced by MongoDB Inc. in 2018. It includes most of the text and provisions of the GNU Affero General Public License version 3 (AGPL v3), and primarily replaces section 13 "Remote Network Interaction; Use with the GNU General Public License." with a new section that requires that anyone who offers the functionality of SSPL-licensed software to third-parties as a service must release the entirety of their source code, including all software, APIs, and other software that would be required for a user to run an instance of the service themselves, under the SSPL. In contrast, the AGPL v3's section 13 covers only the program itself (the copyrightable work licensed under AGPL v3).
The SSPL is not recognized as free software by multiple parties, including the Open Source Initiative (OSI) and multiple major Linux vendors, as the aforementioned provision is discriminatory towards specific fields of use.. In it's announcement MongoDB Inc. wrote that it grants "all of the same freedoms the community has always had with MongoDB under [the GNU...