Timefold Community is Open Source software, released under the Apache License 2.0.
Timefold Enterprise is proprietary software with Source Available.
Timefold Solver was forked on 20 April 2023 from OptaPlanner, which was entirely Apache-2.0 licensed (a permissive license).
Timefold Solver is a derivative work of OptaPlanner, which includes copyrights of the original creator, Red Hat Inc., affiliates and contributors, that were all entirely licensed under the Apache-2.0 license. Every source file has been modified.