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ZEsarUX vs MAME: catalog facts
ZEsarUX	MAME
Free Free and open source.	Free Free and open source under the GPL 2.0. No ROMs are included.
Windows, macOS, Linux	Windows, macOS, Linux
Covers every Sinclair computer Supports many regional Spectrum and ZX81 clones	Covers thousands of arcade, console and computer systems in one program Accuracy is the stated priority, so behaviour matches the original hardware
Dense interface with many options Focused on Sinclair machines and their clones	Accurate emulation of later hardware needs a genuinely fast machine ROM sets must match the exact version MAME expects, which frustrates newcomers
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-2.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 21, 2026

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