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RawTherapee vs SILKYPIX Developer Studio: catalog facts
RawTherapee	SILKYPIX Developer Studio
Free Free and open source under GPLv3.	Paid One-time purchase with a 30-day free trial; one license covers up to three PCs.
Windows, macOS, Linux	Windows, macOS
Non-destructive 32-bit floating point processing engine Two demosaicing algorithms can be applied to the same image	One-time purchase instead of a subscription One license can be registered on up to three PCs
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	Paid software after the trial period Several product editions and versions can make choosing confusing
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	Not stated if it works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked September 24, 2026

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