With Owlbear Rodeo 2.0 getting officially released the developers haven’t quite made made good on their promises to open source the original Owlbear Rodeo (releasing under a non-commercial license instead of a proper Open Source license what they are now calling “Owlbear Rodeo Legacy”), but the source is available on GitHub, complete with a docker-compose file to spin up your own instance.
Open source is an industry term, the code is NOT open, it’s available. I can read it. I cannot use it in anything that might net some profit in the future. “open-source” is defined by the OSI here: https://opensource.org/osd/.