Oh, my mistake. I shouldn't have used the word "proprietary", but too late to edit. There does seem to be community-made runtimes: https://rive.app/docs/runtime

Oh, my mistake. I shouldn't have used the word "proprietary", but too late to edit. There does seem to be community-made runtimes: https://rive.app/docs/runtimes/community-runtimes https://rive.app/docs/runtimes/community-runtimes