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LightZone vs RawTherapee: catalog facts
LightZone	RawTherapee
Free Free and open source under the BSD-3-Clause licence.	Free Free and open source under GPLv3.
Windows, macOS, Linux	Windows, macOS, Linux
Processes camera RAW files Runs on Windows, macOS and Linux	Non-destructive 32-bit floating point processing engine Two demosaicing algorithms can be applied to the same image
Smaller community than better-known RAW developers Documentation lives mainly in the repository	The project itself says it benefits users who take the time to learn it No library or catalogue management; it develops files, it does not organise them
Downloadable app	Downloadable app
Open source	Open source
License: BSD-3-Clause	License: GPL-3.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 20, 2026

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