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ART vs LightZone: catalog facts
ART	LightZone
Free The software is free under its open-source licence. Hosting, hardware and external…	Free Free and open source under the BSD-3-Clause licence.
Windows, macOS, Linux	Windows, macOS, Linux
It keeps RawTherapee's processing quality while cutting the number of controls, which makes the same raw engine much…	Processes camera RAW files Runs on Windows, macOS and Linux
Trading away controls means less fine adjustment than RawTherapee, and it has no library or cataloguing features.	Smaller community than better-known RAW developers Documentation lives mainly in the repository
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: BSD-3-Clause
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 October 1, 2026

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