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mtPaint vs Aseprite: catalog facts
mtPaint	Aseprite
Free Free and open source under the GPL-3.0.	Paid Paid license, with a free trial version.
Windows, Linux	Windows, macOS, Linux
Edits indexed palette and 24-bit RGB images Layers, channels and animation support	Tools made specifically for pixel art, such as pixel-perfect strokes and RotSprite Frame tags, onion skin and multiple playback modes for animation
Basic tools compared with full photo editors No release binaries published on the GitHub repository	Paid software, with only a trial for free Focused on pixel art, not general photo editing
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 23, 2026

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