In the January 2023 survey we received responses from 1,132,268,801 sites across 270,967,923 unique domains, and 12,156,700 web-facing computers. This reflects a gain of 6,894,269 sites, but a loss of 270,799 domains and 77,725 computers.
Within the top million busiest sites, Cloudflare has jumped from 3rd to 1st place — overtaking both Apache and nginx in a single month — its market share increased by 0.56pp and now stands at 21.64%. Along with Apache (21.40%) and nginx (21.20%), the top three web servers power almost two-thirds of the top million busiest sites.
Cloudflare’s journey to the top of the million busiest sites metric began in the February 2021 Web Server Survey, when we started tracking it separately from nginx to reflect Cloudflare’s extensive use of in-house technologies. At the time of this split, Cloudflare was already the third most used within the top million busiest sites, having overtaken Microsoft in March 2019. In September 2022, Cloudflare announced its replacement of nginx with Pingora, a new in-house HTTP proxy.
Cloudflare was founded in 2009 and launched publicly in 2010. Its core service is a content delivery network which sits between end-users and websites, providing increased performance by caching content and using optimised routes across the Internet.
It grew quickly, with its core service available for free and with generous bandwidth limits. In 2014 it launched Universal SSL, providing free access to HTTPS for sites using Cloudflare. The company went public in 2019. It has mitigated some of the largest denial-of-service attacks ever observed on the Internet: most recently a 2.5 Tbps attack targeting a server for the video game Minecraft in 2022.
However, its growth has not been without controversies. Its content neutrality policy has been criticised
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