Spacebar is a free, opensource selfhostable discord-compatible chat, voice and video platform.
- Discord-compatible (Use all your custom clients/bots with minimal changes)
- Selfhostable (Server)
- Open Source (GitHub Organization)
- Configurable (Configure every aspect and limits to your needs)
- Decentralized (no abuse of power and doesn’t have a single point of failure)
- Extendable (secure and cross-platform plugin system)
- Themeable (cross-platform theme system with design editor)
- Secure (publicly audited and hosted FOSS software for transparent foundation in terms of security)
Element seems to have voice and video chats in beta right now, and they plan to implement it into the Element application, so it looks like it is on the way at least.
https://element.io/app-for-productivity