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KVIrc vs mIRC: catalog facts
KVIrc	mIRC
Free Free to download and use; donations are accepted.	Paid Shareware that can be tried, with a paid registration from the official site.
Windows, macOS, Linux	Windows
Built-in scripting language with documented API Themes, addons and translations available	Mature client with over thirty years of development Still receiving releases
IRC only, no other chat protocols Many options can feel heavy for casual use	Windows only Proprietary shareware requiring registration
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-2.0	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 October 2, 2026	Official website Full listing and sources Checked September 24, 2026

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