These are different paradigms. I have used tapestry and Seam (JSF) and Seam has a number of significant advantages over tapestry in my opinion... I would recommend you do a spike of your main program thread in both Seam and Tapestry and by then you would be able to tell for yourself. A point to consider is that Seam/JSF is pretty much where Sun (JAVA EE) is going as even Seam is a reference implementation of a JSR (http://jcp.org/en/jsr/detail?id=299) so its very "mainstream" and transportable. I hope this helps. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4072281#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...