"Cwtch is an extension of the metadata resistant protocol Ricochet to support asynchronous, multi-peer group communications through the use of discardable, untrusted, anonymous infrastructure. " https://cwtch.im/
Very very small instance for feminists. Right now this instance is only moderated by Gaba with gaba-kind-of-rules and it is invite only. If you want an invite send a message to gaba at systerserver.net.