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darktable vs ON1 Photo RAW: catalog facts
darktable	ON1 Photo RAW
Free Free and open source, funded by donations.	Paid One-time purchase with no subscription required.
Windows, macOS, Linux	Windows, macOS
Fully non-destructive: your original raw file is never modified Professional colour management maintained all the way through to print	Raw processing, organizing and layered editing in one app One-time purchase instead of a subscription
The project itself says it is not a free Adobe Lightroom replacement A steep learning curve; the module list assumes you know the underlying concepts	Proprietary and paid Frequent yearly versions can mean paying again for upgrades
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 23, 2026

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