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Privacy Badger vs AdGuard Browser Extension: catalog facts
Privacy Badger	AdGuard Browser Extension
Free Free and open source under the GPL.	Free The browser extension is free to install.
Browser extension	Browser extension
Blocks trackers it observes behaving badly, not only ones on a list Made by the EFF, with no monetisation attached	Blocks ads, pop-ups and trackers Cosmetic filtering hides leftover page elements
Not an ad blocker; ads that do not track are left alone Learning-based blocking can miss trackers that appear on only one site	Only filters inside the browser, not other apps System-wide filtering requires AdGuard's separate apps
Browser extension	Browser extension
Open source	Open source
License: GPL-3.0	License: GPL-3.0
Not stated if an account is 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 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.