MoonBit compiler is available on GitHub

I noticed they chose the SSPL licence. I'm working on a similar sort of project and am evaluating AGPL3 vs SSPL. (If my project is successful, it has a high risk of cloud providers both large and small co-opting it, and I'd like to proactively head that off.)

The AGPL precisely covers that part. https://www.gnu.org/licenses/license-list.en.html#AGPLv3.0

You can also email licensing@fsf.org with your use case and I am sure they will be able to help.