New Launch: OONI Measurement Aggregation Toolkit (MAT)


Today the Open Observatory of Network Interference (OONI) team is thrilled to announce the public launch of the OONI Measurement Aggregation Toolkit (MAT)!

The MAT is a tool that enables you to create your own custom charts based on aggregate views of real-time OONI data collected from around the world.

Use the MAT to track internet censorship worldwide based on real-time OONI data!

About the MAT


Are you a researcher, journalist, or human rights defender interested in investigating internet censorship around the world? OONI’s new Measurement Aggregation Toolkit (MAT) was built for you!

The MAT enables you to track internet censorship around the world and create your own custom charts based on real-time OONI network measurement data.

What is OONI data?

Since 2012, OONI has built a free and open source app (called OONI Probe) that you can install and run to measure various forms of internet censorship. Through the OONI Probe app, you can run tests on your network to measure the blocking of websites, the blocking of instant messaging apps (WhatsApp, Facebook Messenger, Telegram, Signal), and to measure the reachability of censorship circumvention tools (such as Psiphon and Tor), among many other tests. By default, all OONI Probe test results are automatically sent to OONI servers, processed, and published as open data in real-time.

In short, OONI data is OONI Probe test results. And OONI Probe test results contain network measurements on the testing of websites and apps around the world, often containing evidence of internet censorship.

Since 2012, OONI has openly published more than 808 million network measurements collected from 24 thousand networks in 240 countries and territories. Every minute, as OONI Probe users around the world run more tests, new measurements are automatically published in real-time. The OONI database is therefore one of the largest open datasets on internet censorship to date.

Why use the MAT?

To enable the public to explore OONI data and to investigate internet censorship around the world, we created OONI Explorer, which is a web platform that enables users to explore OONI measurements through a search tool. However, OONI Explorer lists individual measurements, requiring users to inspect each measurement one by one. This can make it difficult to observe trends and patterns, as identifying and confirming the blocking of services often requires looking at many measurements at once (“in aggregate”).

We have therefore provided data analysis support to our partners and broader community over the years, analyzing OONI data in order to answer key questions such as the following:

The MAT incorporates our data analysis techniques, enabling you to answer such questions without any data analysis skills, simply with the click of a button! You can also generate your own custom charts based on aggregate views of real-time OONI data, which you can then share on social media and use as part of your research and/or advocacy.

Using the MAT


The MAT provides filters that enable you to select the parameters you care about in order to plot charts based on aggregate views of OONI data.

Specifically, the MAT includes the following filters:

Depending on what you would like to explore, adjust the MAT filters accordingly and click Show Chart to generate a chart.

For example, if you would like to check the testing of BBC in all countries around the world:

This will plot numerous charts based on the OONI Probe testing of worldwide, as illustrated below.


Interpreting MAT charts

The MAT charts (and associated tables) include the following values:

When trying to identify the blocking of a service (e.g., check whether:

For example, if you would like to check the potential blocking of Instagram in Russia through the MAT:

This will generate the following MAT chart.


From the above chart, we can see that was previously accessible in Russia, and only started to present signs of blocking on 13th March 2022. From 14th March 2022 onwards, we observe a large volume of anomalies which has persisted ever since, providing a strong signal of blocking. We are also able to see that the blocking of Instagram is confirmed on some networks (where measurements show that the blocking of was automatically confirmed). Moreover, the fact that some measurements over the last month show that was accessible suggests that the block is not implemented on all networks in Russia. To explore how the blocking of varies across networks in the country, select ASN under the Y axis of the MAT.

Please note that the presence of anomalies is not always indicative of blocking, as false positives can occur. A large volume of anomalies can provide a signal of potential blocking, but it’s useful to corroborate such data with other relevant resources (when possible). For example, when looking at measurements pertaining to the reachability testing of circumvention tools like Tor and Psiphon, it’s worth looking at Tor Metrics and the Psiphon Data Engine (both of which share usage stats) as well. Quite similarly, OONI data on the testing of can be cross-referenced with YouTube traffic data from the Google Transparency Report. OONI data on the testing of websites can also generally be compared with data collected from Censored Planet.

You can access raw OONI data by clicking on the bars of MAT charts, and subsequently clicking on the relevant measurement links.


We hope the internet freedom community finds the MAT useful for investigating and responding to internet censorship events around the world.

If you have any questions, feedback, or feature requests, we’d love to hear from you! You can open a ticket or write us an email.


We thank all OONI Probe users worldwide who have contributed (and continue to contribute) measurements, supporting the MAT. We also thank our community members for their invaluable feedback.