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Snes9x vs Mesen: catalog facts
Snes9x	Mesen
Free Free and open source under a non-commercial licence: the Snes9x licence permits free…	Free Free and open source under the GPL.
Windows, macOS, Linux	Windows, macOS, Linux
Very high compatibility with the SNES library, including cartridge enhancement chips Native builds for Windows, Linux (GTK and X11), FreeBSD and macOS	Cycle-accurate emulation with one of the best debuggers in any emulator Covers several systems in a single application
The licence prohibits commercial use, so it is not open source in the OSI sense Less cycle-accurate than bsnes or higan if exactness is your priority	Accuracy costs more CPU than fast emulators The debugging feature set is overwhelming if you only want to play
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 22, 2026

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