Anonymity networks
Tor privacy rating
Anonymity network that routes traffic through three volunteer-run relays with layered encryption, used through Tor Browser and other apps to hide location, resist tracking and bypass censorship.
Summary
Tor scores 100 out of 100 (grade A) on the anonymity networks criteria. It meets 4 of 4 criteria: open source, no trackers or telemetry, no ads or data sales and independent audit. It is based in the United States: Five Eyes member; subject to the US CLOUD Act.
Score 100 out of 100. How scoring works
Criteria
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Yes
Open source Weight 3 of 3
Is all the source code needed to run the product public?
BSD-3-Clause. Source releases are published at dist.torproject.org. The Tor GitLab now requires sign-in to view files.
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Yes
No trackers or telemetry Weight 3 of 3
Are the website and apps free of third-party trackers, with any analytics anonymous and any telemetry off by default?
The privacy policy states the software has no tracking, telemetry or analytics, and the website loads no trackers.
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Yes
No ads or data sales Weight 2 of 3
Is the product funded without advertising, ad targeting or selling user data?
Funded by donations and grants to a non-profit, with no ads or data sales.
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Yes
Independent audit Weight 2 of 3
Has an independent security or privacy audit been published within the last three years?
Full 7ASecurity penetration test report covering Tor core code changes and network tools; Cure53 also published a full report on Tor Browser apps and tools.