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Markup Hero vs Flameshot: catalog facts
Markup Hero	Flameshot
Free Described by the developer as free.	Free Free and open source; no paid version.
Windows, macOS, Linux, Web	Windows, macOS, Linux, Command line
Annotates screenshots, images, PDFs and websites Shareable links to annotated items	In-place editing: arrows, highlight, blur or pixelate, text, shapes and counters on the selection itself Customisable interface colour, button selection, shortcuts and save behaviour
Sharing depends on the developer's hosted service Closed source	On Wayland it needs the right portal or compositor support, which varies by desktop No built-in video or GIF recording
Downloadable app, Web application	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 20, 2026

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