What are the advantages of Weblogic or Websphere over Glassfish or JBoss, since they may reach costs of millions of dollars?Edit: Is there additional functionality? The all are Java EE Full Certified.The question is about technology, not business or marketing. From the technological POV how are the servers different?
Advantages of paid Java Application Servers?
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Here's a list (note that not all of the points may applay in every case):Better performanceBetter management/admin toolsBetter integration with various other productsBetter support - usually included in the license costs. Someone to blame when things go wrongNote that you can get paid support for JBoss and Glassfish as well (in the latter case via a separate Oracle GlassFish Server edition).