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 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 see these questions and answers about user statistics.
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|
Snowflake bridge down for scheduled upgrade.
|2021-06-12 to 2021-06-13||snowflake||
Outage of Snowflake bridge.
|2021-06-10 to present||
Experiment to test latencies between relays.
status.torproject.org post announcing start
|2021-06-04 to present||Nigeria||
Block of Twitter in Nigeria. Increase in the number of bridge users.
article relay graph bridge graph
|2021-05-17 to 2021-06-05||
Experiment to test the accuracy of relays' advertised bandwidth estimation.
status.torproject.org post announcing start post announcing end advertised bandwidth graph relay flags graph
|2021-05-14 to 2021-05-18||meek Unknown||
The number of meek users temporarily drops to < 10.
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.