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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 country and transport graph

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, and they distinguish connecting clients by transport protocol, which may include pluggable transports. Even though bridges don't report a combination of clients by country and transport, it's possible to derive and graph lower and upper bounds from existing usage statistics. For further details check the documentation on Reproducible Metrics.

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
2023-05-31 snowflake Release of Orbot 17.1.0-BETA-2-tor.0.4.7.11.
release
2023-05-22 snowflake Restarted the snowflake-01 bridge for an upgrade.
comment
2023-05-21 snowflake Restarted the snowflake-02 bridge for an upgrade.
comment
2023-05-12 to 2023-05-14 China snowflake Block of Snowflake default front domain in China.
issue BBS thread forum thread
2023-04-19 China obfs4 snowflake Changed the recommended transport in Connection Assist in China from obfs4 to snowflake.
comment commit
2023-04-12 snowflake Orbot begins a release rollout of version 17.0.0-RC-1-tor.0.4.7.11. First release of Orbot to include the snowflake-02 bridge along with the existing snowflake-01. Has a change to the Snowflake DTLS fingerprint (removes Hello Verify Request) to mitigate reported blocking in Russia.
release Orbot commit adding snowflake-02 IPtProxy commit upgrading Snowflake
2023-04-11 snowflake Release of Snowflake WebExtension 0.7.2, with a fix for missing client country information that had been introduced in 0.6.0 on 2022-06-27. The result is better country-level attribution of Snowflake users: most who had been being assigned to ?? are now assigned to their proper geolocated country.
archive comment
2023-04-11 China obfs4 Unknown Sudden drop in access to bridges from the "settings" and "moat" pools from China.
comment bridge graph
2023-04-08 snowflake Deployed a performance optimization on the snowflake-01 bridge.
comment
2023-04-07 snowflake Deployed a performance optimization on the snowflake-02 bridge.
comment
2023-03-31 to 2023-04-18 webstats Unknown Tor Browser update pings temporarily drop further.
graph issue
2023-03-22 snowflake Rebooted the snowflake-02 bridge to make nf_conntrack changes persistent.
comment
2023-03-22 webtunnel Release of Tor Browser 12.5a4, first release with WebTunnel for mobile.
blog post issue
2023-03-22 snowflake Rebooted the snowflake-01 bridge to make nf_conntrack changes persistent.
comment
2023-03-15 snowflake Release of Orbot for Android v17 BETA 2. First release of Orbot to include the snowflake-02 bridge along with the existing snowflake-01. Has a change to the Snowflake DTLS fingerprint (removes Hello Verify Request) to mitigate reported blocking in Russia.
release Orbot commit adding snowflake-02 IPtProxy commit upgrading Snowflake
2023-03-13 snowflake Restarted snowflake-01 bridge for a bugfix.
comment issue
2023-03-13 snowflake Restarted snowflake-02 bridge for a bugfix.
comment issue
2023-03-10 to 2023-03-13 snowflake Temporarily restarted snowflake-server on the snowflake-02 bridge to activate the Go race detector.
comment
2023-03-06 snowflake Re-increased firewall connection tracking limits on the snowflake-01 and snowflake-02 bridges, which had been unintentionally reduced to the defaults since 2023-02-16.
comment
2023-01-20 to present webstats Unknown Tor Browser update pings drop temporarily. A similar effect is present in other years.
graph issue
2022-06-06 to 2023-04-05 Network-wide DDoS attack.
status.torproject.org issue forum thread graph onion v3 traffic
2021-06-10 to present Experiment to test latencies between relays.
status.torproject.org post announcing start
2021-01-01 to present China snowflake Unknown Increased failure to bootstrap using Snowflake from China.
comment
2018-09-26 to present fte Outage of default FTE bridge 128.105.214.162:8080.
comment
2018-09-26 to present fte Outage of default FTE bridge 128.105.214.163:8080.
comment
2018-01-05 to present Outage of the op-hk OnionPerf instance.
op-hk graph
2017-12-04 to present DDoS attack creates load on the network.
tor-relays thread relay graph summary post ticket
2017-02-10 to present OR exit Measurement error from bandwidth authority causes decrease in measured bandwidth in Europe.
mailing list post

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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.