Like other Java enterprise tools, Tomcat has migrated from the original Java EE specification to Jakarta EE. Tomcat 9 and earlier were based on Java EE; Tomcat 10 and later are based on Jakarta EE.

With the transition to the jakarta namespace and Jakarta EE 9, the enterprise Java ecosystem prepares for the development of cloud-native Jakarta EE 10. Specifications for the Jakarta EE 9 Platform ...