Compare software

Slimjet vs Helium: catalog facts
Slimjet	Helium
Free Free to download and use. The software is closed source.	Free Free and open source, supported by sponsors.
Windows, macOS, Linux	Windows, macOS, Linux
Ad blocking works without extensions, and the extra download, form-fill and video tools are part of the browser…	Ad, tracker and cookie banner blocking on by default No telemetry or background requests without consent
It is closed source and maintained by a very small team, so security updates depend on how quickly…	Younger project than established privacy browsers Built on Chromium, so it follows Google's engine decisions
Downloadable app	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	Not stated if it 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.