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NetSurf vs Supermium: catalog facts
NetSurf	Supermium
Free Free and open source under the GPL version 2.	Free Free to download from its GitHub repository.
macOS, Linux	Windows
Very small and light on resources Independent layout engine written in C	Current Chromium engine on Windows XP through Windows 8.x Tracks recent Chromium versions
Limited support for modern script-heavy websites Not a replacement for a mainstream browser on current sites	Windows only Maintained by a small team, so security fixes may lag behind Chrome
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 September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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