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

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