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Iridium Browser vs Helium: catalog facts
Iridium Browser	Helium
Free Free to download and build from source.	Free Free and open source, supported by sponsors.
Linux	Windows, macOS, Linux
Blocks query and metrics reporting to Google by default Reproducible builds with auditable changes	Ad, tracker and cookie banner blocking on by default No telemetry or background requests without consent
Distributed mainly as source tarballs, so packages depend on maintainers No mobile versions	Younger project than established privacy browsers Built on Chromium, so it follows Google's engine decisions
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-3.0
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

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