Competitors
Echo is often compared to frameworks such as GWT (Google Web Toolkit) as both Echo and GWT (among others) offer a programming model that completely abstracts users from the web tier. However Echo differs substantially from GWT in the way it interacts with JavaScript. GWT essentially implements a subset of the Java API in Javascript, and as such, Java code is compiled to JavaScript and fully executed on the client side. Echo on the other hand offers since version 3 a dual-stack approach. Applications can be written in JavaScript (Client-side) or Java (Server-side) or in mixed forms.
Comparable frameworks include Vaadin, RAP, ZK, Openlaszlo, Icefaces, Thinwire, Apache_Wicket, and jSeamless.
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