Apache Tomcat vs IIS

IIS is used by more websites in our catalog: 115 use Apache Tomcat and 14,679 use IIS.

Apache Tomcat sites have the higher median Ahrefs Domain Rating (Apache Tomcat: 54, IIS: 35).

Between 2026-06 and 2026-07, Apache Tomcat went from 0.02% to 0.01% of all tracked sites, while IIS went from 1.8% to 1.7%. Apache Tomcat is gaining ground faster in our index.

0 websites in our catalog use both Apache Tomcat and IIS.

Adoption is counted from Site Stats Database's own crawl; Domain Rating comes from Ahrefs and traffic from DataForSEO. Figures reflect the sites we track and refresh at least monthly.