There's also an XMPP room you can join for groupchat! The name is digdeeper on server conference.riseup.net. We use OMEMO encryption there so try enabling that if you want to join. You will need an OMEMO compatible client (Pidgin, Gajim, Conversations...) and server (https://compliance.conversations.im/test/xep0384/ - but it doesn't seem to be fully reliable, for example Riseup DOES SUPPORT OMEMO, while Disroot does not seem to - so don't use it). For Pidgin, OMEMO works through the lurch plugin, so install it and enable through Tools > Plugins. Then, you will have to add all the conversation participants to your buddy list - else the ones you didn't add won't be able to see your messages. Type the command "/lurch enable" (without the quotes) and you can start chatting! For Gajim, you need OmemoGajimPlugin. If you have a problem, message me and I will try to help. There is no client for Android which supports OMEMO in group chats. Conversations has an admitted
arbitrary requirement imposed by Conversations that prevents OMEMO from working; aTalk, Profanity, Pix-Art Messenger and converse.js have also failed our tests. Therefore you should use a desktop / laptop for the group chat.