[3] In October 2011, the project obtained certification by Oracle Corporation as a compatible implementation of the Java EE 6 Web Profile.

[4][5] TomEE includes the following open-source components: TomEE JAX-RS, a second distribution, adds support for Java API for RESTful Web Services (JAX-RS).

The full TomEE Plus distribution adds additional support for:[6] The OpenEJB project was started by Richard Monson-Haefel and David Blevins in 1999 as an open source implementation of the Enterprise JavaBeans specification.

Blevins continued to develop OpenEJB and integrate components of this project with Apache Geronimo.

In 2003, the OpenEJB component became a project operating under the auspices of the Apache Software Foundation at which time it was rewritten with a focus on leveraging Tomcat as an embedded web container.