The best replacement for tomcat is jboss.

The best alternatives to tomcat are rated as following:
★★★★★  jboss
★★★★  apache
★★★  jetty
★★★  websphere
★★★  glassfish
★★★  weblogic
★  iis
★  tomee
★  resin
★  geronimo
★  node.js
  jboss which is better
  nginx
  netty
  wildfly
  hornet
  f-15 eagle
  dcon
  apache web server
  catalina
  tc server
  kel tec p32
  super hornet
  websphere application server
  apache server
  f\/18 e\/f super hornet
  was
  google app engine
  apache http
  apache http server
  f15 eagle
  j2ee

Your alternative for tomcat is not listed? Suggest!
Speaking about tomcat, one probably shouldn't forget about apache.

Other search terms related to tomcat and their ratings are:
★★★★★ apache
★★★★ eclipse
★★★ iis
★★★ ssl
★★★ php
★ mysql
★ java 8
★ intellij
★ netbeans
★ jms
★ jenkins
★ spring
★ maven
★ jboss
★ jersey
★ apache httpd
solr
httpd
apache web server
web xml
gta5
ejb
nginx
apache server
axis
https
jsf
jsp
You have in mind a companion for tomcat and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of tomcat in all years. Click on graph for more.
tomcat
jboss
apache