The only credible alternative to discord right now that is also free and open source and not completely reliant on venture capital and traditional economics in general is Fluxer.app - The app in itself is extremely promising and provides an almost 1:1 clone to discord with a few nice additions such as federation (which is still not available but in course of making). Unfortunately it is still under maintenance right now but I am willing to wait a little to be able to use something that respects me as a user and human being instead of being milked to death for my data to be taken by big evil corps who’re actively working to suppress our freedom. Free as in freedom, both software and people