“Tor metrics are the ammunition that lets Tor and other security advocates argue for a more private and secure Internet from a position of data, rather than just dogma or perspective.”
— Bruce Schneier (June 1, 2016)
We estimate the number of users by analyzing the requests induced by clients to relays and bridges.
This graph shows the estimated number of clients connecting via bridges. These numbers are derived from directory requests counted on bridges. Bridges resolve client IP addresses of incoming directory requests to country codes, so that graphs are available for most countries. For further details see these questions and answers about user statistics.
The following events have been manually collected on this wiki page and might be related to the displayed graph.
|Dates||Places/Protocols||Description and Links|
|2018-01-08||ipv4 ipv6||geoip and geoip6 databases updated to "January 5 2018 Maxmind GeoLite2 Country" (|
|2018-01-05 to present||Outage of the op-hk OnionPerf instance.|
|2017-12-28 to present||Iran||Protests in Iran, blocking of various services including Tor.|
OONI reportRelay graphBridge graphTweet
|2017-12-21||Release of tor 0.3.2.8-rc, intended to fix the bug that was enabling an ongoing DDoS on relays.|
|2017-12-20||ipv4 ipv6||geoip and geoip6 databases updated to "December 6 2017 Maxmind GeoLite2 Country" (|
|2017-12-04 to present||DDoS attack uses a bug in the KIST scheduler to crash relays by running them out of memory.|
Tor-relays threadRelay graphSummary postTicket
|2017-11-15||meek||Outage of meek-amazon bridge.|
|2017-11-11 to 2017-11-12||Outage of the op-hk OnionPerf instance.|
|2017-11-10||ipv4 ipv6||geoip and geoip6 databases updated to "November 6 2017 Maxmind GeoLite2 Country" (|
|2017-11-01||meek||Turned off the old meek-amazon CDN endpoint d2zfqthxsdq309.cloudfront.net.|
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This material is supported in part by the National Science Foundation under Grant No. CNS-0959138. Any opinions, finding, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. "Tor" and the "Onion Logo" are registered trademarks of The Tor Project, Inc.. Data on this site is freely available under a CC0 no copyright declaration: To the extent possible under law, the Tor Project has waived all copyright and related or neighboring rights in the data. Graphs are licensed under a Creative Commons Attribution 3.0 United States License.