Flameshot
Close matchFreeFree. Select an area, then annotate with arrows, text, boxes and blur before saving or copying.
Your files: Saves .png and .jpg. It cannot open Snagit's .snag files, so export those first.
Does Snagit run on Linux?
Verdict: No
No. TechSmith lists Snagit's system requirements for Windows and macOS only, with no Linux version, and your licence does not carry over. Free Linux screenshot tools cover most of what it did.
Snagit's own system requirements page names Windows 11, Windows 10 and several Windows Server releases, plus recent versions of macOS. Linux is not mentioned at all. TechSmith has never shipped a Linux build and there is no compatibility route worth recommending for a program that hooks into the screen the way Snagit does.
Most of what home users do with Snagit is covered for free on Linux. Flameshot lets you grab part of the screen and then draw arrows, boxes, numbered steps and blurred-out sections before you save or copy, which is the Snagit workflow people actually use. Ksnip does much the same on KDE systems.
Two things are genuinely worse. Snagit's scrolling capture, which stitches a long web page into one image, has no clean free equivalent, although Firefox can screenshot a full page on its own. And Snagit's video recording is more convenient than the alternatives, where you would reach for OBS Studio instead, which is more capable but more work to set up.
Your existing .snag files are a problem. They are TechSmith's own format and nothing on Linux opens them, so export anything you care about as .png or .jpg while you still have Windows.
What to use instead of Snagit
ksnip
Close matchFreeThe same idea with a few more options, and it suits KDE systems. Can capture a delayed shot.
Your files: Saves standard image formats. No .snag support.
OBS Studio
Different way of workingFreeFor the video side of Snagit. More capable, but built for streaming so the setup takes longer.
Your files: Records .mp4 and .mkv files rather than Snagit's video format.
This doesn't have to stop you
One stubborn program doesn't have to decide the whole question. You can keep Windows on the same PC and restart into it only when you need Snagit. Everything else you do can move.
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