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 distinguish connecting clients by transport protocol, which may include pluggable transports, so that graphs are available for different transports. For further details check the documentation on Reproducible Metrics.
The following events have been manually collected in the metrics-timeline Git repository and might be related to the displayed graph.
|Dates||Places/Protocols||Description and Links|
geoip database updated to "June 4 2014 Maxmind GeoLite2 Country" (
geoip6 database updated to "June 4 2014 Maxmind GeoLite2 Country" (
|2014-06-01 to 2014-06-19||Russia <OR> Relays Unknown||
Rapid increase of relay users in Russia, going from 80K to 200K before settling in around 150K.
Reinstalled the bridge running meek and flash proxy.
|2014-04-29||flashproxy fte obfs2 obfs3||
Release of Tor Browser 3.6, the first stable release with integrated pluggable transports.
blog post transport graph
Release of Tor Browser 3.6-beta-2.
|2014-03-18||flashproxy fte obfs2 obfs3||
Release of Tor Browser 3.6-beta-1, the first release with integrated pluggable transports.
|2013-08-19 to 2014-04-28||<OR> Relays||
Relay users increase globally from about 800K to over 5M, when computers in the Mevade/Sefnit botnet began using Tor to communicate. The user count decreased in the following months through efforts to clean up the botnet. Sometime in 2014-04, the botnet switched from using Tor to using SSH.
blog post tech report analysis switch to SSH
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.