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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”
Relay users graph

This graph shows the estimated number of directly-connecting clients; that is, it excludes clients connecting via bridges. These estimates are derived from the number of directory requests counted on directory authorities and mirrors. Relays resolve client IP addresses to country codes, so that graphs are available for most countries. Furthermore, it is possible to display indications of censorship events as obtained from an anomaly-based censorship-detection system (for more details, see this technical report). 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
2020-08-31 obfs4 Shutdown of default obfs4 bridge frosty.
ticket
2020-08-13 snowflake Deployed version 0.4.1 of the Snowflake WebExtension, with NAT type detection in the browser.
archive comment
2020-07-06 snowflake Deployed NAT-aware matching at the Snowflake broker.
comment
2020-06-02 snowflake Release of Tor Browser 10.0a1, the first release with Snowflake for Android.
blog post ticket
2020-05-22 snowflake Release of Tor Browser 9.5a13, the first release with Turbo Tunnel session persistence features for Snowflake.
blog post ticket
2020-04-23 snowflake Redeployed the Snowflake bridge with support for non–Turbo Tunnel clients and KCP–Turbo Tunnel clients, removing support for QUIC–Turbo Tunnel clients.
comment
2020-02-22 snowflake Made the Snowflake bridge stop reporting client IP addresses of 0.0.0.0. This also affects log messages that report how many client connections had an attached IP address.
comment
2020-02-19 snowflake Deployed a Turbo Tunnel–capable Snowflake bridge.
comment
2020-02-18 snowflake Outage of the Snowflake bridge caused by memory exhaustion.
ticket
2019-12-06 ipv4 ipv6 geoip and geoip6 databases updated to "December 3 2019 Maxmind GeoLite2 Country" (geoip-db-digest 4974C4F1F6842975999D0774F2636F383312EA2D, geoip6-db-digest 2046D67D7BBE67AFF12E1CEDD9F9083AB5E3DFAC).
commit
2019-11-14 ipv6 snowflake Changed DNS to point to the IPv6-enabled Snowflake broker.
comment
2019-11-14 snowflake Deployed webext-0.1.0 of the Snowflake proxy (which uses a new proxy–broker protocol) to snowflake.torproject.org.
comment
2019-11-13 snowflake Released version 0.1.0 of the Snowflake extension for Firefox and Chrome, using a new proxy–broker protocol.
comment
2019-11-13 snowflake Restarted the broker with a new proxy–broker protocol.
comment
2019-11-09 ipv4 ipv6 geoip and geoip6 databases updated to "November 6 2019 Maxmind GeoLite2 Country" (geoip-db-digest 967E4D14ADF0C9439C31FB7B666537A0551C1E6A, geoip6-db-digest BD6E89A28801FA447693EDEC6D47ECCA03B8CD20).
commit
2019-10-28 snowflake Version 0.0.13 of the Snowflake extension is released, decreasing the poll frequency to once every 300 s. The standalone proxy-go instances still poll once every 5 s.
comment
2019-10-17 snowflake Pointed snowflake-broker.torproject.net (one of three domain names for the Snowflake broker) to a new broker instance set up with IPv6. Metrics unintentionally start being collected from the new instance, instead of the old instance that was still in use.
ticket ticket
2019-10-02 ipv4 ipv6 geoip and geoip6 databases updated to "October 1 2019 Maxmind GeoLite2 Country" (geoip-db-digest 34ABC09019FAB09BA3083B3663EC0B807FC16151, geoip6-db-digest F4D3BEC6294DF7FAEAEE5966CC6706CF91CE9BC4).
commit
2019-10-01 snowflake Release of Tor Browser 9.0a7, the first release that has Snowflake for Windows.
blog post ticket
2019-08-06 to 2019-08-09 Experiment to test the accuracy of relays' advertised bandwidth estimation.
description of experiment post announcing start post announcing end advertised bandwidth graph relay flags graph
2019-07-27 snowflake The Snowflake proxy hosted at snowflake.torproject.org is updated, changing domains from bamsoftware.com to freehaven.net in order to work around the Google Safe Browsing block.
comment
2019-07-27 snowflake Version 0.0.7 of the Snowflake extension for Chrome is released, changing domains from bamsoftware.com to freehaven.net in order to work around the Google Safe Browsing block.
comment
2019-07-26 flashproxy snowflake Cupcake 2.0 is released, now working with Snowflake rather than flash proxy.
Chrome Web Store page
2019-07-26 snowflake Version 0.0.8 of the Snowflake extension for Firefox is released, changing domains from bamsoftware.com to freehaven.net in order to work around the Google Safe Browsing block.
comment
2019-07-23 snowflake The broker domain name snowflake-broker.bamsoftware.com is blocked by Google Safe Browsing, preventing the Snowflake web browser extension from working.
ticket comment noting decrease in proxies
2019-07-03 snowflake The Snowflake web browser extension for Chrome is published.
comment
2019-06-26 snowflake The Snowflake web browser extension for Firefox is published.
comment
2019-06-20 obfs4 A call to set up new obfs4 bridges is posted to the tor-relays mailing list.
mailing list thread thread continues
2019-06-11 ipv4 ipv6 geoip and geoip6 databases updated to "June 10 2019 Maxmind GeoLite2 Country" (geoip-db-digest A131E1F283F4AD307248B03A70B0413E81ADF2A4, geoip6-db-digest 0EFF3EE1E22927EC9A77BFFAFD703F3A5B32FA79).
commit
2019-05-28 Failure of network equipment at site of op-ab OnionPerf instance (equipment now replaced)
onionperf timeouts graph
2019-05-22 fte Release of Tor Browser 9.0a1, removes support for FTE.
blog post ticket
2019-05-17 ipv4 ipv6 geoip and geoip6 databases updated to "May 13 2019 Maxmind GeoLite2 Country" (geoip-db-digest 35DFDA2D06D2A0467EF37D60A67B438B11952B74, geoip6-db-digest C0193A1D086819353FABBF70AADB15866B7B2525).
commit
2019-04-29 Network equipment failure at site of op-ab OnionPerf instance
performance graph
2019-04-17 Unknown Tor browser update pings roughly double.
graph metrics-team thread
2019-04-16 snowflake Outage of Snowflake fallback proxy-go instances, caused by a failure to restart after segregating old logs.
ticket
2019-04-03 ipv4 ipv6 geoip and geoip6 databases updated to "April 2 2019 Maxmind GeoLite2 Country" (geoip-db-digest 62A97D4DEBF76A5CE5C232B95BBF05B191EB8AAA, geoip6-db-digest 66620E57A8427C53D6084B3229807DC320CDC3D0).
commit
2019-03-22 snowflake Outage of the Snowflake broker, caused by a full disk.
ticket
2019-03-06 ipv4 ipv6 geoip and geoip6 databases updated to "March 4 2019 Maxmind GeoLite2 Country" (geoip-db-digest 5B90C2F06292D8237A5C77E27ED4ABABF4AE0684, geoip6-db-digest E971FCA4A89F6C685928FF9371D1BF7A2484F4CA).
commit
2019-02-12 ipv4 ipv6 geoip and geoip6 databases updated to "February 5 2019 Maxmind GeoLite2 Country" (geoip-db-digest DDAA25B4425EAA45EE8E92A6531CD3246C8E989A, geoip6-db-digest 0368FA722D90026E60BD60A26F615791A7A53D21).
commit
2019-02-07 snowflake Disabled the 3 proxy-go instances that were pointing at the former broker hosted on App Engine.
comment
2019-01-07 Bridges Release of tor 0.3.5.7, 0.3.4.10, and 0.3.3.11. Fixes the bug, present since 0.3.5.1-alpha/0.3.4.1-alpha, of idle bridges being unuseful.
comment ticket blog post ticket
2019-01-07 ipv4 ipv6 geoip and geoip6 databases updated to "January 3 2019 Maxmind GeoLite2 Country" (geoip-db-digest 2B8A70B399CF8B471289A4DB52947DE965D8DE5F, geoip6-db-digest FEA33E6F398DF67252F41DDD3D010E69B33D544E).
commit
2018-12-05 ipv4 ipv6 geoip and geoip6 databases updated to "December 5 2018 Maxmind GeoLite2 Country" (geoip-db-digest 0684E08BDC01ABB41A717E9C55BDEB21531CFAC8, geoip6-db-digest AFFAD1475879D57B1C1EA119141EFA0E57547290).
commit
2018-11-26 to 2018-11-28 Outage of the onionperf-us instance, caused by a Greenhost east coast VPS migration.
mailing list post
2018-11-26 to 2018-11-28 flashproxy Outage of the flash proxy badge hosting server, flashproxy.bamsoftware.com, caused by a Greenhost east coast VPS migration.
2018-11-19 to 2018-11-27 Slow-running processes on the metrics host cause an observed drop in the overall relay bandwidth graph.
mailing list thread
2018-11-16 to 2018-11-22 snowflake A full disk stops the Snowflake bridge and fallback proxies from working.
ticket
2018-11-11 ipv4 ipv6 geoip and geoip6 databases updated to "November 6 2018 Maxmind GeoLite2 Country" (geoip-db-digest 603BE8A0CA1B7164D76DBC75A280C9CA0A556F65, geoip6-db-digest 1CEF662539C0D91EC07A7C5C13134E3317B451E4).
commit
2018-10-25 to 2018-10-28 Relays Gap in observed number of relay users, caused by the estimated fraction of reporting relays exceeding 100%.
metrics-team post ticket graph archived graph
2018-10-10 ipv4 ipv6 geoip and geoip6 databases updated to "October 9 2018 Maxmind GeoLite2 Country" (geoip-db-digest 76907A8345DA84CC724CDD573B6E08F6A089FEEB, geoip6-db-digest 5852AB4D3A96D7526DD47D5573CB4FA32BE4ECEB).
commit
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
2018-09-18 Bridges Release of tor 0.3.5.1-alpha, containing a bug that makes idle bridges unuseful.
2018-09-11 ipv4 ipv6 geoip and geoip6 databases updated to "September 6 2018 Maxmind GeoLite2 Country" (geoip-db-digest C9118A0D763E069B890674A4D5000A3DB846746B, geoip6-db-digest 8A46B41B2AE16F3705C67DEECD20EAA50B043A51).
commit
2018-09-10 Bridges Release of tor 0.3.4.8, 0.2.9.17, 0.3.2.12, and 0.3.3.10. 0.3.4.8, containing a bug that makes idle bridges unuseful, becomes the stable release.
blog post
2018-07-20 to 2019-05-02 onion Unknown The number of v2 onion services increases from 70k to 100k.
comment

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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.