239 Progress Telerik & Kendo UI Reviews
We use KendoReact not to have to reinvent the wheel on UI components and to be faster in developing our React components. The Kendo React components are well-documented and easy to understand. Depending on the complexity of the components, like, for example, the Scheduler or Data Grid, the documentation grows with the complexity. The APIs are all very structured, there are always a lot of examples, and there are tons of functionalities that can be used to spice up the UI. But the best part is actually the support. If there is anything that, despite the documentation, can't be figured out, there is a support forum and also the possibility to submit a support ticket directly. With both possibilities, we never got abandoned and always got very detailed help to be able to accomplish what we needed to. This is the best support I have experienced so far. Review collected by and hosted on G2.com.
Based on my year-long experience with Progress (Kendo UI is being developed by them), I can't really tell you anything that I dislike about this company or the products they offer. In a company I worked for earlier, we also used their product Sitefinity, which is a CMS, and we never had any issues that couldn't be resolved together with them. Review collected by and hosted on G2.com.

The easier codification to make the Web interface being similar to other platforms of our solution (Desktop and Mobile), that helps our framework be unique to all existing platforms, letting use the same characteristics in all our front, making it easer our clients to use our solution. Review collected by and hosted on G2.com.
Lack of documentation and examples, even in existing documentation is not updated at an adequate rate when new versions are generated. Review collected by and hosted on G2.com.

The detail usage guide for all the features. The multiple platform support. Trouble shooting support is also quite good and responsive. I happened to raise 2 help tickets which were resolved to my satisfaction and in accepted time. Review collected by and hosted on G2.com.
I didn't see mention of possible breaking changes with upgrade. That sometimes become tuff when it comes to upgrade if you behind 3 or 4 version from the current one. Review collected by and hosted on G2.com.

The Grid and Calendar components. The ability to export data in formats like PDF. Overall an easy way to make a professional looking web app using the components. Review collected by and hosted on G2.com.
I am using the Javascript version. There is a learning curve to do things the "Kendo" way. It can be frustrating at first, but once you catch on and keep constantly working in the same manner, it is of course easier. The documentation can be hard to understand at first. Having a response time for support of 24 hours can also be tough, especially during the first several months when you are getting into using the product. What I noticed is I can submit multiple tickets at different times on the same day but they all get answered or should I say delivered to you at the same time which leaves me to believe the 24 hour period is built in. If there is a possibility of getting an answer earlier, that should be allowed, the 24 hour time should be a max, not set in stone. There were a coupel of times that support would respond to me quickly if I had a follow up question but most of the time it is another 24 hours meaning it can take three or four days to resolve something that should be done within hours. If the folks at Progress are reading this, my suggestions are to allow quicker access to support for the first several months and to release all other responses as they are ready and not be forced to wait 24 hours if it is not needed. Review collected by and hosted on G2.com.

Support and documentation is great. Solid components and really complete suite. Review collected by and hosted on G2.com.
New features requested take a long time to be released. Review collected by and hosted on G2.com.
I really like the table in kendo UI. It has all kinds of features I needed for my project. Among them, importing data in tables in different kinds of formats is the most useful feature. Review collected by and hosted on G2.com.
The limitations in some components where customization is limited. It would be better if the developer has the freedom to customize components for His or Her needs Review collected by and hosted on G2.com.

I got a professional GUI with little effort. (1) It meets expectations, (2) each library is in its native framework, and (3) the support is excellent. The libraries are specific for each environment (ng/jQuery/Vue/Jsp), but the API is mostly compatible. Review collected by and hosted on G2.com.
I don't dislike anything, but I would appreciate a Thymeleaf wrapper in addition to the JSP one (Thymeleaf is quickly replacing JSP in the Java world), and I would surely pay an extra for that. Review collected by and hosted on G2.com.
The wide variety of components that are available to build applications. Review collected by and hosted on G2.com.
The documentation. While there is documentation, it's not always the best. There are not enough code examples on how to implement some features. Also, there should be references to all the variations on how to configure and set up components. The documentation generally explains the very basic information, and I need to contact support to find out how to do something that I feel should be in the documentation. Review collected by and hosted on G2.com.

Grid component is the best, it supports inline editing which makes UI look very responsive. Also we can export the complete grid data into Excel or PDF format.
Looks and feel of the kendo UI components are very minimalistic.
Configurations for every use case is available with kendo. Review collected by and hosted on G2.com.
It's very easy to use and a lot of demos are available which is very helpful but the documentation is not detailed for few components.
There are not enough code snippets on how to implement some features. Review collected by and hosted on G2.com.
Easy to develop, easy to integrate, good support Review collected by and hosted on G2.com.
Not very helpful documentation provided to develop based on that. Upgrading between different versions is painful Review collected by and hosted on G2.com.