Hello,
As mentioned in the topic you may have already read: About the Zama open-source licenses we are using BSD3-clear license, GPL was just an example.
Our licensing model is pretty simple: free for developing a POC, non-free for commercial usage.
If you want to build a commercial solution on top of Concrete or Concrete-ML you are in the commercial case.
If you want to further discuss the topic, maybe we could arrange a small meeting. Let me know.
Best,
Alex.