The Net Data Directory collects and shares information on different sources of data about the Internet. For more about the project, see our about page. To get started, use the search box below, or check out our quick start guide.


INTROL is the Spanish Audit Bureau of Circulations and it audits close to 300 websites, mostly media companies, and offers data on unique browsers, visits, and pageviews.


This source provides weekly data on websites performance and offers a series of indexes, by industry and by country or region, with information on response time, response rate, and outages. It also produces the Internet Health Report, a real time view of the performance (latency, availability, packet loss) of major US Tier 1 backbones.