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UNetbootin vs Popsicle: catalog facts
UNetbootin	Popsicle
Free Free and open source under the GPL.	Free Free and open source.
Windows, macOS, Linux	Linux, Command line
Runs on Windows, macOS and Linux with the same interface Optional persistence file keeps changes between boots	Flashes several USB drives in parallel GTK interface plus a command-line version
Fails or produces unbootable media with several modern hybrid ISOs Development is slow and the interface is very dated	Linux only Focused on writing images, with no image download feature
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License not stated
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 22, 2026	Official website Full listing and sources Checked September 23, 2026

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