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Tor Metrics
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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
  • BridgeDB requests by requested transport
  • BridgeDB requests by distributor
  • 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 check the documentation on Reproducible Metrics.

Source:

Download graph as PNG or PDF.

Download data as CSV.

Learn more about the CSV data format or how to reproduce the graph data.

Related events

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
2022-02-01 Tor 0.3.5 reaches end of life.
mailing list post
2022-01-31 snowflake Switched the snowflake bridge from a load-balanced staging server back to the now load-balanced production server. Debugged connection problems until 2022-01-31 19:52:04.
issue comment comment
2022-01-28 snowflake Switched the snowflake-server (at the time running on a load-balanced staging server) for a version with CPU profiling.
comment
2022-01-25 snowflake Switched the snowflake bridge to a temporary load-balanced staging server. Debugged connection problems until 2022-01-25 18:47:00.
issue comment post comment
2022-01-10 Kazakhstan obfs4 The Tor Project begins to distribute obfs4 bridges that listen on ports that are reachable in Kazakhstan, despite the ongoing Internet shutdown.
forum post
2022-01-07 snowflake Increased capacity of the mapping to client IP addresses on the snowflake bridge.
issue deployment comment
2022-01-05 to 2022-01-11 Kazakhstan Country-wide Internet shutdown in Kazakhstan. Was preceded by a shutdown of most mobile networks starting 2022-01-04 14:30. Access was restored for a few hours each day.
Cloudflare blog post RIPE Labs blog post NTC thread BBS thread IODA
2022-01-04 Gambia Internet outage in Gambia.
blog post
2021-12-29 snowflake Outage of the snowflake bridge.
comment alert
2021-12-24 Russia obfs4 Another round of obfs4 enumeration and blocking occurs in Russia.
comment
2021-12-22 to present Finland Relays Unknown Increase of relay users in Finland.
tor-talk thread possible explanation graph
2021-12-22 snowflake Rebooted the Snowflake bridge to increase the number of CPUs from 4 to 8.
issue
2021-12-14 snowflake Release of Tor Browser 11.5a1, with an altered DTLS fingerprint in Snowflake to counteract blocking in Russia.
blog post issue NTC post
2021-12-13 Russia The fraction of networks in Russia blocking Tor, measured by OONI, increases from about 20% to about 50%.
relay graph
2021-12-08 obfs4 Release of Tor Browser 11.0.2, containing a new default obfs4 bridge "deusexmachina".
blog post issue
2021-12-08 Russia The Tor Project web server block is expanded from *.www.torproject.org to *.torproject.org.
record GitLab comment NTC comment zapret-info diff
2021-12-07 Russia The www.torproject.org web server is added to the registry of blocked domain names in Russia, by IP addresses and by hostname *.www.torproject.org.
record GitLab comment NTC comment zapret-info diff OONI report
2021-12-01 to 2021-12-13 Russia meek Blocking of the IP address of the meek-azure front domain in certains ISPs in Russia, part of a wider phenomenon of blocking Tor beginning 2021-12-01.
post about start (2021-12-03) post about end (2021-12-13) post about end (2021-12-15) post about end (2021-12-26)
2021-12-01 to present Russia Blocking of Tor directory authorities, relays, default obfs4 bridges, meek-azure, and Snowflake in some ISPs in Russia. There was a temporary cease of blocking for less than a day starting on 2021-12-08.
NTC thread BBS thread issue blog post OONI report
2021-11-17 to 2022-02-02 obfs4 Run a Tor Bridge campaign, offers rewards for running obfs4 bridges.
blog post about start blog post about end
2021-10-08 to 2021-11-14 Netherlands Relays Unknown Temporary quintupling of direct users from the Netherlands.
relay graph

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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.