September 2021 Web Server Survey

In the September 2021 survey we received responses from 1,188,038,392 sites across 264,360,621 unique domains and 11,368,033 web-facing computers. This reflects a loss of 23.4 million sites, but a gain of 627,000 domains and 40,300 computers.

The largest increase in both unique domains and active sites was seen by LiteSpeed this month, with gains of 571,000 (+9.3%) domains and 458,000 (+6.0%) active sites. Much of this increase was concentrated at a single hosting provider, NameCheap, where there were corresponding drops in the numbers of domains and active sites using Apache. As a result, LiteSpeed’s market share in the domains metric increased by 0.21 percentage points to 2.6%.

Cloudflare also saw strong growth in domains, with an increase of 519,000 resulting in a small increase in its market share to 7.90%. Amongst the million busiest websites Cloudflare had substantially the biggest increase in use, leaving it with an 18.0% market share. It is now just 44,000 sites or 4.4 percentage points of market share behind nginx in second position.

Other server vendors to see increases in terms of unique domains include OpenResty which grew by 314,000 domains, and market leader nginx which grew by 195,000. Despite having only the fourth largest growth this month, nginx maintained its 29.8% market share.

The number of web-facing computers using nginx has increased once again, whilst both Apache and Microsoft lost both in absolute numbers and market share. This month nginx saw an increase of 40,800 raising its market share to 37.2%. Apache and Microsoft each lost 0.24 percentage points of market share to leave them with 30.8% and 11.9% shares. LiteSpeed gained 4,660 computers (+5.9%).

Total number of websites

Web server market share

Developer August 2021 Percent September 2021 Percent Change
nginx 441,930,791 36.48% 422,211,703 35.54% -0.94
Apache 305,180,858 25.19% 295,667,361 24.89% -0.30
OpenResty 75,516,218 6.23% 77,052,370 6.49% 0.25
Cloudflare 55,830,630 4.61% 56,362,363 4.74% 0.14
Web server market share for active sites

Developer August 2021 Percent September 2021 Percent Change
Apache 49,014,866 24.38% 48,288,904 24.21% -0.17
nginx 40,727,572 20.26% 40,553,124 20.33% 0.07
Google 19,227,458 9.56% 18,896,757 9.47% -0.09
Cloudflare 18,198,275 9.05% 18,294,632 9.17% 0.12

For more information see Active Sites

Web server market share for top million busiest sites

Developer August 2021 Percent September 2021 Percent Change
Apache 246,550 24.65% 242,558 24.26% -0.40
nginx 223,765 22.38% 223,775 22.38% 0.00
Cloudflare 178,021 17.80% 180,043 18.00% 0.20
Microsoft 63,759 6.38% 64,292 6.43% 0.05
Web server market share for computers

Developer August 2021 Percent September 2021 Percent Change
nginx 4,186,471 36.96% 4,227,284 37.18% 0.22
Apache 3,518,060 31.06% 3,503,918 30.81% -0.24
Microsoft 1,379,219 12.18% 1,357,220 11.94% -0.24
Web server market share for domains

Developer August 2021 Percent September 2021 Percent Change
nginx 78,512,209 29.77% 78,707,646 29.77% 0.00
Apache 67,266,660 25.51% 66,328,129 25.09% -0.42
OpenResty 38,179,121 14.48% 38,493,039 14.56% 0.08
Cloudflare 20,355,821 7.72% 20,874,772 7.90% 0.18