Apache OpenEJB and Apache TomEE are born from the same project and community. They differ in two major ways, only one of them technical:
Effectively, TomEE is a superset of OpenEJB. They share the same code and TomEE grew out of OpenEJB.
Tomcat | TomEE | TomEE JAXRS | TomEE+ | OpenEJB | |
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Java Servlets | ![]() |
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Java ServerPages (JSP) | ![]() |
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Java ServerFaces (JSF) | ![]() |
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Java Transaction API (JTA) | ![]() |
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Java Persistence API (JPA) | ![]() |
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Java Contexts and Dependency Injection (CDI) | ![]() |
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Java Authentication and Authorization Service (JAAS) | ![]() |
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Java Authorization Contract for Containers (JACC) | ![]() |
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JavaMail API | ![]() |
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Bean Validation | ![]() |
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Enterprise JavaBeans | ![]() |
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Java API for RESTful Web Services (JAX-RS) | ![]() |
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Java API for XML Web Services (JAX-WS) | ![]() |
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Java EE Connector Architecture | ![]() |
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Java Messaging Service (JMS) | ![]() |
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