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Adblock Plus vs 1Blocker: catalog facts
Adblock Plus	1Blocker
Free Free and open source under GPLv3 or later.	Freemium Free tier available; full feature set requires a subscription.
iOS, Browser extension	macOS, iOS, Browser extension
Available for all major desktop browsers Customizable filter lists	Blocking happens on-device rather than through a proxy server Large built-in rule set with granular customization
The homepage leans on marketing claims rather than technical detail Separate apps are needed for mobile browsers	Limited to Safari rather than all browsers Full rule customization requires the paid tier
Downloadable app, Browser extension	Downloadable app, Browser extension
Open source	Closed source
License: GPL-3.0-or-later	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 22, 2026

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