Open Source Communication - IRC Software
Found 11 self-hosted alternatives in this category.
Ergo
Modern IRCv3 server written in Go, combining the features of an ircd, a services framework, and a bouncer
Kiwi IRC
Responsive web IRC client with theming support. ([Demo](https://kiwiirc.com/nextclient/), [Source Code](https://github.com/kiwiirc/kiwiirc))
ngircd
Portable and lightweight Internet Relay Chat server for small or private networks
Quassel IRC
Distributed IRC client, meaning that one (or multiple) client(s) can attach to and detach from a central core
Robust IRC
IRC without netsplits. Distributed IRC server, based on RobustSession protocol
The Lounge
Self-hosted web IRC client. ([Demo](https://demo.thelounge.chat/), [Source Code](https://github.com/thelounge/thelounge))
UnrealIRCd
Modular, advanced and highly configurable IRC server written in C for Linux, BSD, Windows, and macOS