Hello there, 

Infragistics Pro is suitable for developers who need robust UI controls for specific platforms and basic app-building tools. 

Infragistics Ultimate is intended for developers and teams who require a complete suite of tools across multiple platforms, including mobile, advanced reporting, and comprehensive design-to-code workflows, with added benefits like priority support. 

The main difference between Infragistics Ultimate vs. Infragistics Pro is in what’s included in the plan. For example, Ultimate includes native libraries for Angular, Blazor, React, Web Components, ASP.NET Core, ASP.NET MVC, and jQuery. There are also the industry-leading UI toolkits for Windows Forms and WPF and ability to build Cross-Platform Applications for Web, Mobile, Desktop and Beyond with Windows UI, Universal Windows Platform (UWP), and Uno Platform. Xamarin toolkit is also included. But the biggest difference is that it provides access to our low-code App Builder + Indigo.Design system as part of the subscription. The two tools are designed to streamline app development from design to code by automating repetitive tasks, providing code preview and code generation, bind data, etc. 

Infragistics Pro, on the other hand, brings the following: UI libraries for Angular, ASP.NET (Core and MVC), Blazor, jQuery, React, Web Components, toolkits for Windows Forms, WPF, Windows UI (WinUI), Universal Windows Platform (UWP), Uno Platform, a complete toolkit for Xamarin,  

You can explore more here: 

https://ko.infragistics.com/products/ultimate 

https://ko.infragistics.com/products/pro 

https://ko.infragistics.com/free-downloads