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Users

We estimate the number of users by analyzing the requests induced by clients to relays and bridges.

  • Relay users
  • Bridge users by country
  • Bridge users by transport
  • Bridge users by country and transport
  • Bridge users by IP version
  • Top-10 countries by relay users
  • Top-10 countries by possible censorship events
  • Top-10 countries by bridge users
  • “The anonymous Internet”
Bridge users by transport graph

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 see these questions and answers about user statistics.

Source:

Download graph as PNG or PDF.

Download data as CSV.

Related events

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
2018-04-13 snowflake Snowflake client registrations (based on domain fronting) stop working, because of a Google infrastructure change that stops domain fronting from working. The time of the change is between 2018-04-13 14:00:00 and 2018-04-13 18:00:00, based on when the bandwidth graph of the Snowflake bridge 5481936581E23D2D178105D44DB6915AB06BFB7F went to zero.
ticket
2018-04-02 snowflake Reinstated periodic restarts of the fallback snowflake proxies.
comment
2018-03-27 snowflake Restarted the fallback snowflake proxies with no limit on memory.
comment
2018-03-26 snowflake Release of Tor Browser 8.0a5. Improves snowflake client performance.
blog post ticket
2018-03-23 snowflake Restarted the fallback snowflake proxies with a limit on resident memory (ulimit -m) rather than virtual memory (ulimit -v).
comment comment
2018-03-22 snowflake Disabled periodic restarts of the fallback snowflake proxies; gave them a memory limit of 200 MB.
comment
2018-03-22 snowflake Increased memory limit of the fallback snowflake proxies from 200 MB to 400 MB.
comment comment
2018-03-22 snowflake Provisionally increased memory limits of the fallback snowflake proxies to 400 MB, 800 MB, or unlimited.
comment
2018-03-16 snowflake Deployed another attempt to fix frequent crashes of the fallback snowflake proxies.
comment
2018-03-14 snowflake Deployed an attempt to fix frequent crashes of the fallback snowflake proxies.
comment commit
2018-03-07 to 2018-03-15 Sri Lanka Sri Lanka blocks Facebook, Instagram, WhatsApp, and Viber.
relay graph bridge graph article
2018-03-05 to 2018-03-08 Germany <OR> Relays Unknown Steady drop in the number of relay users in Germany, from 1.5M to 650k. (Drop coincides with the release of tor 0.3.2.10, 0.3.1.10, and 0.2.9.15, which offer better resistance against DoS attacks; as well as improvements in speed for downloads from onions graph; see this graph as well. More datapoints: DDoS of the network happened around the time that saw an increase in the number of relay users in Germany, see entry above or graph)
graph ticket
2018-03-03 Release of tor 0.3.2.10, 0.3.1.10, and 0.2.9.15, which offer better resistance against DoS attacks.
blog post ticket
2018-02-27 to 2018-03-02 Less than 3 bandwidth authorities are available.
tor-relays
2018-02-24 China Blocking in China intensifies following the announcement of proposed changes to remove presidential term limits.
article
2018-02-12 Relays Tor 0.3.3.2-alpha reaches deb.torproject.org repositories
2018-02-11 Relays Tor 0.3.3.2-alpha reaches FreeBSD repositories
2018-02-10 Relays Tor 0.3.3.2-alpha is released (containing important denial-of-service migitations for relays)
blog
2018-02-08 ipv4 ipv6 geoip and geoip6 databases updated to "February 7 2018 Maxmind GeoLite2 Country" (geoip-db-digest FF83AD73DE7672C77EDF8888F4B241642C7C90F7, geoip6-db-digest B1CDBFEB7C88F82EF3B5289CAFEED1321FA4693F).
commit
2018-02-01 to 2018-02-05 Iran meek Unknown Drop of meek users in Iran; other transports not affected.
graph
2018-01-24 to present webstats Tor Browser update pings roughly halve, again. The beginning corresponds with the release of Tor Browser 7.5; however unlike with Tor Browser 6.5.2, there was no change to app.update.url this time.
ticket thread
2018-01-23 obfs4 Tor Browser 7.5 is released. It adds the default obfs4 bridge noisetor01:46089.
blog post
2018-01-20 Relays Some more directory authorities upgrade to 0.3.2.9 which enforces new requirements for the exit flag. ~50 relays lose the exit flag
tor-relays post
2017-12-10 to 2018-02-01 Germany <OR> Relays Unknown Further, slow increase of relay users in Germany, from 500k to over 1.5M.
graph reddit thread ticket

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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.