Squire
Squire is a chat app for communities and friend groups: servers with text channels, threads and forums, voice and video calls, screen sharing, end-to-end encrypted direct messages, collectable cards, and games and apps that run right inside a call. It works in the browser and as a desktop app.
Squire is free. Optional paid plans (Squire +, Server Plus and server boosts) add extras like bigger uploads and sharper streams. See pricing.