ZK is renowned for "Ajax without JavaScript", enabling developers to build rich Web applications in pure Java. In addition, with programs executed at the server, developers can leverage all the Java technologies, such as Java EE and Spring, while back-end data and services are readily available.

Unlike JavaScript-based solutions where business logic may reside on the client side and can easily be inspected and manipulated; with ZK all business logic is stored and executed at the server meaning increased security for Enterprise applications.

Since our first release in 2005, ZK has been the leader in the industry: we are the 1st Java framework supporting MVVM pattern, the first PC+Mobile responsive solution that supports write once run everywhere, the first client+server fusion architecture, and the first web spreadsheet component…. Innovation is the driving force that differs us from everyone else and motivates us to be better and better each day.

We believe open source is the best way to build an open, secure, and trustworthy software that millions can depend on. ZK CE is freely available under the LGPL license, for both open source and commercial projects. Meanwhile ZK EE with advanced features and professional support are available for mission critical projects.