Guides
Background on license types, commercial use, version pinning and forks.
Source-Available vs Open Source: The Difference
What separates source-available licenses such as SSPL-1.0, BUSL-1.1, RSALv2 and Elastic-2.0 from OSI-approved open source licenses.
Commercial Use Under BUSL, SSPL, RSALv2 and ELv2
What BUSL-1.1, SSPL-1.0, RSALv2 and Elastic License 2.0 restrict for self-hosting, managed services and embedding in products.
How to Stay on the Last Version Before a License Change
What the version boundary means, how to pin a release before a license change, and what to check about security patches.
Switching to a Community Fork: Checklist
Points to check before moving to a fork such as Valkey, OpenTofu or OpenSearch: fork point, governance, license and compatibility.
Why Projects Moved to Source-Available Licenses
The reasons projects gave in their official announcements for moving to source-available licenses, and the changes that followed.
Get license change alerts
We email you when a tracked project changes its license.
Check the box above to show the Google sign-in button.