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)
Mumble is another strong, open source, self-hosted option.
If only it didn’t looked like a 20 year old software.
maybe try: https://github.com/Fancy-Mumble/FancyMumbleV2