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nip4 vs G'MIC: catalog facts
nip4	G'MIC
Free Free and open source under the GPL-2.0 licence.	Free Free and open source under the CeCILL licenses.
Windows, Linux	Windows, Web, Command line
Spreadsheet model recalculates dependent images when an input changes Built on the fast libvips image library	Several interfaces: command line, GIMP and Qt plug-ins, web service and C++ library Large set of image filters that can be scripted
No releases published on the GitHub repository Suited to processing pipelines rather than ordinary photo retouching	Command-line syntax takes time to learn Not a standalone painting or layer-based editor
Downloadable app	Downloadable app, Web application
Open source	Open source
License: GPL-2.0	License: CECILL-2.1
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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