@Gina It depends. Krita is more tailored towards drawing whereas GIMP would be better suited for image manipulation.
Krita is for digital painting, it cannot replace Photoshop for most things.
@boilingsteam what would you advice in this case?
I don't have a good advice. Photoshop workflows are hard to replicate on software like GIMP. If someone is really used to Photoshop the best advice I would have is to run Photoshop in a VM. Relearning everything from scratch in GIMP is possible but takes massive efforts.
I would also add that GIMP's UI/UX choices are quite frustrating when you come from Photoshop. There are clearly many cases where "the way Photoshop does things" is simpler/easier compared to GIMP. There are probably reasons why GIMP can't replicate them the same way (patents? lack of UX designers in GIMP's team?) but that has not improved significantly over the years.
I can also recommend a combination of Krita and GIMP to replace Adobe's Photoshop. However, to ease the transistion for people used to Photoshop's UI I suggest using these themes ( https://github.com/draekko/gimp-cc-themes ) as they use similar icons and the dark theme is easier on the eyes than GIMP's defaults...
GIMP also has fantastic docs and tutorials in many languages to get someone started:
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