• “ ... We compared these (JSF, Vaadin and Zkoss) frameworks using ten criteria such as security, integration with Spring… Zkoss was the best fit for our requirements.
• “ we implemented the application in 6 month with a team of 4-6 people!

• “ ZK Framework's many fine-tuned components and well-documented interface make it possible for us to modify and expand its functionality.
• “ ZK Spreadsheet offers nearly all the functionalities we need.

• “ The stability of the solution and the support (technical and commercial) from the Team has given me the confidence to use and reuse ZK.
• “ Thanks to the speed in which interfaces can be developed, I even thought of using ZK to produce the models used for the specifications!

• “ ZK was a good match for our organization by allowing our developers to focus on writing Java code and xml templates
• “ The new functionality gave our classic spreadsheet a modern touch and, with ZK Charts, we were able to offer our partners even more flexibility and functionality. As a result, our partners have responded positively, recognizing that we are the right solution for their business needs.

• “ ZK's Model-View-ViewModel (MVVM) architecture enabled the development of a modular and maintainable codebase.
• “ With enhanced security, scalability, and professional support, ZK provides a robust solution for developing and maintaining complex enterprise-level applications.

• “ We are very satisfied with the ZK framework because it is very stable, and it evolves with the demands of the market.
• “ ZK allows our engineers to focus mainly on the business logic and not on the graphical components.

• “ We are satisfied with the quality of ZK components.
• “ With our positive experience we recommend ZK as the preferred UI framework for our teams.

• “ we like the customer support and its responsiveness... we are comfortable with ZK for over 10 years and never choose to move away.
• “ ZK provides a very quick way to create a very presentable interface for a developer who is not a designer and doesn’t know much about CSS/HTML.

• “ "... for medical contexts and purposes, we were forced to create some components ourselves. We consider the flexibility and easiness of developing customized components a particular benefit.
• “ "ZK Charts offers countless design commands in Java and enables the implementation of JavaScript code to directly modify the underlying Highcharts settings.

• “ With ZK we can integrate the representation of complex medical data without the pitfalls of common user interface development. We can focus on the needs of medical staff and rely on the framework to do the “dirty” work.
• “ ZK allows fast front-end development.

• “ With ZK, we can concentrate on our own development without having to deal with tasks and problem fixes with html / network.
• “ With ZK, it is easy to build a complex web application front-end within an acceptable time frame.

• “ We tried prototypes with GWT and a few other frameworks but decided to use ZK because we could get things done much faster.
• “ ZK has been actively maintained and improved for over a decade. This is a very big benefit for our long-lived project.

• “ This project handles a very large amount of data that needs to be displayed. Using the BigListBox component is one of the crucial parts in the app architecture, and we could not find a feature of similar power in other frameworks.
• “ The ZK chart library provides excellent presentation of data and supports downloading of data points.

• “ Upon leveraging ZK, we were able to rapidly create web applications just like creating desktop applications
• “ easy to develop, seamless integration with Java, efficient MVC, complete documentation & shallow learning curve

• “We evaluated ... 3 different frameworks: OpenXava, Vaadin and ZK. ZK was the easiest and fastest ones.
• “... we find ZUL and Zscript language very convenient as they allow us to try different looks and components for rapid mockup.

• “ Before using ZK, we use a mix of JSP and JavaScript which proved to be painful to maintain and update.
• “ ZK Charts was especially useful to show reservations made on vehicle and tools.

• “ With ZK we can do everything on the Java side, easy to code and debug.

• “ We chose ZK because it works great with Java and that we were able to leverage almost every resource available in Java.
• “ In particular during this difficult year, the support we have received from ZK developers, forums and from the product itself have been outstanding.

• “ ... the switch from Swing to ZK was more natural as there were similar concepts and components.
• “ ZK was also a perfect fit for our community. Given the fact that our back-end is entirely written in Java.

• “ We have been using Keikai and and its predecessor ZK Spreadsheet for over 5 years. Notable customers include Joe Brown’s and Ed Broking.
• “ We believe Keikai is the best online Java based spreadsheet interface.

• “ The best aspects of ZK are: intuitive approach, ease of learning, modularity, MVVM architecture, separation of logic and layout.
• “ ZK is easy to learn, and I like the possibility to create custom components, creating a hierarchy of reusable elements.

• “ Using Keikai, it took us only 1 week to integrate the client’s complex Excel files into the application.
• “ The business users love the embedded Keikai spreadsheet in the application because they can write/change formulas within the software directly in the same spreadsheet way they are familiar with.

• “ ...clearly with a solid and easily manageable framework, to have a smooth development and deployment process...
• “ Involved users have all been very happy about the user experience so ZK adoption can easily be classified as successful.

• “ We developed a complex and and powerful platform for business process analytics in just a few months of work with ZK.
• “ ZK fulfilled all the requirements without drawbacks: full java compatibility, short learning curve, performance optimization and possibility for customization.

• “ We chose ZK instead of Google GWT or Vaadin for its cool features like nice graphic components and powerful binding mechanism.
• “ ... ZK is stable and has a reliable and innovative development road map.

ZK + Excel-based Administration System

• “ None of other systems in the market were able to provide these features.
• “ With ZK, we are able to develop web-base rich client system without any investment on training and staff development.

ZK + SPRING + HIBERNATE

• “ one of the strongest sides of ZK is its efficiency in using server-side resources and fine granulated communication between the browser and server.
• “ Server-centric architecture allows fast development.

ZK + SPRING + HIBERNATE

• “ For us ZK was felt like the correct choice and after over one year of developing, we know we made the right choice!
• “ GWT was really nice but none of the developers liked it as much as ZK.

• “ ZK support team was a great asset and integral part of our team.

• “ the framework hides the complexity of browser-specific JavaScript from the developer, which makes user interface design and implementation more productive!

• “ ZK was our first choice and we don't regret it one bit because it is evolving with the times to satisfy ours and our customers' growing needs, respectively.”

• “ ... easy to learn and provides really cool features and styles...
• “ ZK provides support for all browsers and devices, and it is easy to maintain.

• “ Challenging tasks coupled with fuzzy requirements often characterize ICT research – the flexibility of ZK is a great plus when you have to adapt your web application to moving targets yet aiming at outstanding technical results.”

• “ ZK’s excellent MVVM model makes reuse of software component easy and efficient”

• “ With ZK we get amazing results very quickly, which is extremely convenient for rapid prototyping"

• “ ZK gives us the option to seamlessly integrate parts written in dynamic languages in order to retain TN Planning’s extensibility through user defined macros

• “ ZK seamlessly replaced a heavy JSP+Servlet+custom JS framework giving the possibility to developers to concentrate more on models and processes rather than on obtaining a specific functional behaviour – in this sense, a quick tour in the ZK demo page resulted often truly inspiring!

• “ We chose ZK because it provides a fast, secure and reliable solution, as well as most of the usual interface components we needed already implemented in a very useful way.

• “ Incredibly easy to learn and use, and the workflow is smoother than any other similar tools...
• “ Greater selection of components that can be further tweaked, allowing a wide array of possibilities that adapt to almost any situation.

• “ So far we have found everything we need included in ZK.

• “ Challenging tasks coupled with fuzzy requirements often characterize ICT research – the flexibility of ZK is a great plus when you have to adapt your web application to moving targets yet aiming at outstanding technical results.”

• “ ZK’s excellent MVVM model makes reuse of software component easy and efficient”

• “ With ZK we get amazing results very quickly, which is extremely convenient for rapid prototyping"

• “ Doing as much with as little as possible is our de facto motto. And, ZK has become a critical centrepiece of that strategy”

• “ I like to work with Java than Javascript. ZK is perfect for me.
• “ Users like the Spring Boot+ZK-based pre-registration module a lot, the administrators think it is very easy to use.

• “ Via Appia do not hesitate to express the full satisfaction in developing with ZK and interacting with ZK team; a partnership that will certainly last for many years.

• “ Being a transparent Ajax with Java, ZK was the ideal choice. The solution is easy to understand and has the ability to quickly achieve valuable results.
• “ We look forward to continuing working with ZK for all future dialogue programs.

• “ The way ZK hides all the complexity of communication between the browser and the Java code is kind of like magic; we haven’t seen this in any other similar framework.

• “ ZK is really easy to use and there are good documentations and samples online.
• “ Choosing ZK made our development progress faster and thanks to it, we were able to solve issues easily - displaying user data in an easy-to-understand way.

ZK + Java EE + Glassfish + Hibernate

• “ ZK gives the developer freedom to extend and thereby create custom company widgets without losing any of the power of ZK

• “ I am still convinced that using ZK was the best option we could choose. A substantial part of our success was only possible as we could take benefit of ZK's great functionality, user-experience and documentation, while relying on ZK's excellent stability and compatibility.

ZK + Spring + BONITA +MySQL

• “ easy to development, seamless integration with Java, efficient MVC model view controller, complete documentation & shallow learning curve.

ZK + Spring + Hibernate +MySQL

• “ Simplicity, component quality, community

• “ ZK, thanks for being you.

ZK + Spring + Hibernate +MySQL

• “ ZK boosted my productivity, and made it possible to create a full school management system within a short period of time

• “ We use ZK chart to present performance graphs and statistics. For design we use bootstrap in conjunction with ZK theme.
• “ ZK allowed us to program the interface completely in native java like swing and without the complexity of Google GWT.

Developed a Web Transaction Monitoring System using ZK

• “ Without ZK, it’ll be very difficult for us to develop such a dynamic Web application!

ZK + SPRING + HIBERNATE

• “ ZK is currently the most intact Ajax web application framework available in the industry, providing high level integration and support.
• “ ZK effectively reduces development time by 1/2.

• “ Leveraging on ZK framework and using it as a base for all future applications marks a new beginning for Pennant.
• “ ZK brings the unparalleled benefit of developer-centric approach to all projects of Pennant.

Cloud Based Workforce Management System

• “ we needed to be productive fast ... only ZK provided that level of business agility.
• “ The values in ZK which we recognized the most are good documentation, very easy to start with - the fact that you can have a moveable window in a web page in a few lines is incredible.

Web based tool for secure file transfer and marketing planner

• “ New forms can be created in just a few minutes and easily be connected to entities using data binding, ZK was just the best choice!
• “ They were easy to implement and, more importantly, to customize... With ZK, it was all possible!

WEB Administration GUIs

• “ The simplicity to add UI components programmatically and the handsomeness of the components as a whole convinced the evaluation team.
• “ ZK evidently reduced development time for DIMOCO’s Administration GUIs. Comparing to their existing STRUTS framework, the time factor is obvious...

ZK Spring + MySQL + JPA Hibernate + Tomcat

• “ Another candidate was GWT, but it did not have as many controls as it is included in ZK

ZK + Hibernate + Apache Commons + Elephant Libraries

• “ I was fully convinced after some lines of code: I had the right choice for desktop-like web applications.

Fully based on ZK

• “ When I came across ZK I thought I’ve found the ‘Holy Grail’, because it has all the benefits of powerful end user features, plus the power of solid Java server side logic.
• “ Whatever it takes 50 lines in GWT and several files, it only takes a few lines of code and two files to do the same with ZK.

ZK + JasperReports + Quartz Enterprise Scheduler

• “ After we decided to use ZK and a half year of migration, we speeded up our development 4 times faster than before and this is real!
• “ ZK is very well designed and an active product. This framework is what we expected from Sun, but they missed the train.

ZK + Java + Hibernate

• “ None of this would have been possible, or look nearly as good without the ZK framework. This is a shining example of what an open-source project should be.
• “ I can be confident that my application will always look fantastic and work seamlessly, when the only effort required on my end is updating a few libraries.

Developed an automatic medical imaging Web app

• “ Due to the server-centric approach, programmers don’t even think of the “Web”.

ZK + Spring (with Acegi) + iBatis

• “ ZK provides a means of supplying a rich user interface with minimum complexity.
• “ The ability to use ZUL to prototype a screen with user feedback is extremely useful! The prototype can then be developed into the actual interface, reducing initial development time!

ZK + Spring + Hibernate

• “ ZK has helped me master web application development much faster than I expected
• “ ZK has been the missing piece for developing the web layer of a full-stack web development framework like web4thejob

ZK+ JavaBean + Hibernate

• “ In the test, we developed an User Interface with validations in few minutes, while in traditional JSP with JavaScript it could be hours.
• “ It was awesome to see the power of Ajax without using JavaScript and it was really easy to integrate ZK with other frameworks!

ZK + SPRING + HIBERNATE

• “ Initially the idea was to migrate to Struts GWT, but when I experienced the ease of ZK, I had no more doubts. Luckily I took the right decision.
• “ This high productivity, combination of ZK + AndroMDA, impressed us very much !

ZK + Spring + Hibernate, ZK + Liferay + Alfresco

• “ From continuing tests and works, we keep getting back to the same final truth: NO technology delivers yet as well and as easy Ajax as ZK does.
• “ What ZK keeps offering to our customers is the fastest way of getting interfaces that fits their look and needs, with Ajax powered, and with a very small and smooth knowledge curve!

ZK + Spring

• “ All of our developers who have changed to ZK have enjoyed it and none want to go back.