Category - Web Servers

Undertow is a high performance web server written in java, providing both blocking and non-blocking APIs based on NIO.

We have discovered 5,288 live websites that are using Undertow.

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Technology usage statistics

Websites using Undertow5,288 websites
Most popular in the country US
Market position in Web Servers#35
Market share in Web Servers<0.1%
Most popular version2

Technology adoption

Recent changes in Undertow usage. (See Undertow Usage Changes report)
Websites that added Undertow+352
Websites that dropped Undertow-643
Websites that changed version of Undertow2

Distribution by websites popularity

Undertow detection in the top websites by popularity
Top 10k sites1 websites
Top 100k sites27 websites
Top 1m sites222 websites

Websites utilizing Undertow

Top websites that use Undertow

See full domain list
Flat price per the report, subscription is not required.

Market Share

Undertow market share within the Web Servers category

Geographical Distribution

Technology usage distribution by websites across the globe.

Alternative Technologies

Nginx: Total 34,207,452 domains found using Nginx
Apache: Total 30,690,408 domains found using Apache
Cloudflare Server: Total 7,014,010 domains found using Cloudflare Server
IIS: Total 5,801,234 domains found using IIS
OpenResty: Total 5,047,958 domains found using OpenResty
LiteSpeed: Total 3,653,420 domains found using LiteSpeed
Pepyaka: Total 1,681,235 domains found using Pepyaka
Microsoft HTTPAPI: Total 1,139,214 domains found using Microsoft HTTPAPI
Cowboy: Total 440,125 domains found using Cowboy
GHS: Total 312,123 domains found using GHS


  • 2 (1 subversions, 65 domains)
  • 6 (1 subversions, 1 domains)
  • 7 (1 subversions, 3 domains)
  • 8 (1 subversions, 28 domains)
  • 9 (1 subversions, 4 domains)
  • 10 (1 subversions, 11 domains)
  • 11 (1 subversions, 2 domains)
  • 12 (1 subversions, 1 domains)