Telerik JustMock The Fastest, Most Flexible and
Complete Mocking Solution for Crafting Unit Tests

Loved by .NET Developers 

Why Choose JustMock

What's Included

  1. Mock Everything

    • Interfaces
    • Virtual and abstract methods and properties
    • LINQ queries
    • Sealed classes
    • Static classes, methods, and properties
    • Non-virtual methods and properties
    • Non-public members and types
    • Delegates
    • Generics
    • MsCorLib members
    • DLL imports
    • Threadpool
    • Extension methods
    • Ref return values and ref locals
    • Local functions 
    • Named parameters
    • Microsoft SharePoint
    • Microsoft Entity Framework mocking
    • Silverlight runtime mocking
    • Supported languages C#, VB and F#
  2. Mocking and Assert Functionality

    • Fluent Mocking
    • Future Mocking
    • Partial Mocking
    • Sequential Mocking
    • Recursive Mocking
    • Automocking
    • Assert occurrence
    • Assert Call Order
  3. Build Systems Integration

    • Team Foundation Server 2010-2018
    • Jenkins
    • TeamCity
    • MSBuild
    • Docker
    • Installation Free elevated mocking
    • Command line execution
  4. Integrate With Testing Frameworks

    • MSTest
    • MSTest 2
    • NUnit
    • xUnit
    • MSpec
  5. Integrate With Other Tools

    • VS 2010-2019 Code Coverage
    • VS 2010-2019 InteliTrace
    • JetBrains dotCover
    • NCover
    • OpenCover
    • JetBrains dotTrace
    • PostSharp

See it in Action


Telerik JustMock Lite

Telerik JustMock Lite, the free edition of Telerik JustMock, is the preferred choice for unit testing projects written according to the SOLID principles that don’t require elevated mocking. If you're working on greenfield projects and you don’t have to deal with legacy code, then Telerik JustMock Lite is for you. The free open source mocking framework uses the same codebase for easy upgrade to the full edition. Plus, it's commercially backed with three major releases per year and continuous product improvement both by Progress and the open source community.


Get the Best Value for Money

Save Money

Save Money

Get the best ROI on the market. Progress®Telerik® JustMock is priced at $399 annually per developer with perpetual license, which gives you a complete mocking solution, three major releases per year and technical support from the same developers who built the product.  

Save Money

Save Time

With Telerik JustMock you could save up to 50% in development time. The product can be integrated seamlessly into your organization and doesn’t disrupt your existing business processes. Telerik JustMock is powerful and easy to use with minimal implementation costs and a very short learning curve.

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Buy it as Part of DevCraft

.NET and JavaScript components and Reporting and Productivity tools enable you to build modern and high-performant apps on any web, desktop or mobile platform—fast. Comes with flexible support options designed to cover your every need.

Optimize your time and budget by buying Telerik JustMock as a part of DevCraft Complete and DevCraft Ultimate.

More about DevCraft

What's New

Implement a Visual Studio Window for Visualizing Mocked Objects During Debugging

New Visual Studio Window (v.Beta) for visualizing mocked objects for a better debugging experience when writing unit tests with JustMock.

Improve the Loading Time of JustMock Visual Studio Extension

The loading time of JustMock Visual Studio extension is improved to enable faster start of unit test execution.

Improved API for Arg Class

We’ve improved the API to resolve an ambiguity when using argument matchers.

Support and Learning

Telerik JustMock
Blog Post

30 Days of TDD – Day 11 – What’s the Deal with “Mocking?”

If you’ve never done Test Driven Development or aren’t even sure what this "crazy TDD stuff” is all about than this is the series for you. Read and try!

Telerik JustMock
Blog Post

Unit Testing Blazor Components with bUnit and JustMock

In this guide to unit testing Blazor components, we'll cover everything from setting up your projects to simple unit test examples and a master-detail scenario.

Industry-Leading Support


Expert and Timely Response

The same developers who build Telerik JustMock will answer any questions you might have, even during your trial, to make sure your project always gets delivered on time.

Contact Progress Telerik support

Need Evaluation Help?

If you don't have time to evaluate Telerik JustMock, send us your project requirements. We'll evaluate your required features and let you know how we can help.

Send us your requirements


I recently dropped another leading mocking tool in favor of JustMock. I was never happy with the other tool’s syntax but I couldn’t find anything else on the market. I’ve found JustMock is a much more pleasant experience.

Brad Irby .NET Architect and author of Reengineering .NET, Reengineering .NET

When isolating methods for testing gets difficult when trying to test against legacy code or databases, JustMock really starts to set itself apart. Its features such as MsCorlib, Sealed, Static, Private method and Entity Framework mocking make the seemingly untestable, testable.

Bradley Braithwaite Software Developer, Contented Coder

I've used a series of mocking tools and I believe that the API for JustMock is the most mature that I've encountered so far. The highest praise that I can give a framework tool is to say that its semantics are readable enough that you don't think about them at all as you're reading the code, and this is true with JustMock.

Erik Dietrich Software Developer, DaedTech

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