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Halloy vs mIRC: catalog facts
Halloy	mIRC
Free Free and open source under the GPL-3.0 licence.	Paid Shareware that can be tried, with a paid registration from the official site.
Windows, macOS, Linux	Windows
Broad IRCv3 support including chathistory and soju bouncer features Native cross-platform app from one codebase	Mature client with over thirty years of development Still receiving releases
Configuration is done by editing a text file IRC only; no other chat protocols	Windows only Proprietary shareware requiring registration
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
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.