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 6,293 live websites that are using Undertow.

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Technology usage statistics

Websites using Undertow 6,293 websites
Most popular in the country United States of America
Market position in Web Servers #36
Market share in Web Servers <0.1%
Most popular version 2

Technology adoption

Recent changes in Undertow usage. (See Undertow Usage Changes report)
Websites that added Undertow +50
Websites that dropped Undertow -111

Distribution by websites popularity

Undertow detection in the top websites by popularity
Top 10k sites 1 websites
Top 100k sites 37 websites
Top 1m sites 302 websites

Websites utilizing Undertow

Top websites that use Undertow

Domain Country Rank Contacts
zakupki.gov.ru Russian Federation 6,496
eventbee.com United States of America 16,174
www.eventbee.com 16,174
loadus.exelator.com United States of America 18,135
sedeagpd.gob.es Spain 19,611
www.parlament.gv.at Austria 20,610
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.


  • 2 (1 subversions, 67 domains)
  • 6 (1 subversions, 1 domains)
  • 7 (1 subversions, 4 domains)
  • 8 (1 subversions, 19 domains)
  • 9 (1 subversions, 6 domains)
  • 10 (1 subversions, 14 domains)
  • 11 (1 subversions, 2 domains)

Alternative Technologies

Apache: Total 32,824,098 domains found using Apache
Nginx: Total 31,397,338 domains found using Nginx
IIS: Total 10,899,900 domains found using IIS
Cloudflare Server: Total 6,835,535 domains found using Cloudflare Server
OpenResty: Total 4,174,501 domains found using OpenResty
LiteSpeed: Total 3,482,507 domains found using LiteSpeed
Microsoft HTTPAPI: Total 681,297 domains found using Microsoft HTTPAPI
GHS: Total 313,713 domains found using GHS
Tengine: Total 294,460 domains found using Tengine
Phusion Passenger: Total 256,222 domains found using Phusion Passenger