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Halloy vs Irssi: catalog facts
Halloy	Irssi
Free Free and open source under the GPL-3.0 licence.	Free Free and open source.
Windows, macOS, Linux	macOS, Linux, Command line
Broad IRCv3 support including chathistory and soju bouncer features Native cross-platform app from one codebase	Runs in any terminal, including over SSH Scriptable and highly configurable
Configuration is done by editing a text file IRC only; no other chat protocols	Keyboard and command driven, with a learning curve IRC only, no other chat protocols
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-2.0
No account needed	No account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.