Moq is the only mocking library for .NET developed from scratch to take full advantage of .NET Linq expression trees and lambda expressions, which makes it the most productive, type-safe and refactoring-friendly mocking library available.
Cost / License
- Free
- Open Source
Platforms
- Windows
- .NET Framework
- Microsoft Visual Studio
Software tool that provides over 300 mockups for Apple devices, including image editing, cropping, rotation, and customizable templates.
Cost / License
- Freemium
- Proprietary
Application type
Platforms
- Mac
- iPhone
- iPad


+8
Build a mock Rest API endpoint in seconds. Helps you in UI development, Webhooks, simulating delays, simulating exceptions and server errors, performance test, etc.
Cost / License
- Freemium
- Proprietary
Platforms
- Online
- Software as a Service (SaaS)



JustMock is a comprehensive .NET mocking framework for isolating various dependencies in unit tests. In a single API, JustMock supports mocking of non-virtual methods, non-public members, static methods and classes, sealed classes, and Mscorlib.
Cost / License
- Paid
- Open Source
Application type
Platforms
- Windows
United States

Unit testing framework with simple API and test code generation features, supports C#, ASP.NET, Visual Basic, SharePoint, Silverlight.
Cost / License
- Freemium
- Proprietary
Application type
Platforms
- Windows
Online API Mocking Tool: API Mock, fake API, stub API, simulate API, dummy API. Capture and debug requests instantly. Forward requests to localhost for webhooks testing and debugging. More than 100 random or faker shortcodes for response templating.
Cost / License
- Freemium
- Proprietary
Platforms
- Online
- Software as a Service (SaaS)



Cost / License
- Free
- Proprietary
Platforms
- Online


+1
Hosted mock API generator with conditional matching, stateful CRUD, chaos injection, and a live WebSocket request inspector. No signup required to start.
Cost / License
- Free
- Proprietary
Platforms
- Online
Czechia
EU


+2
Collaboration based mock services with persistent data storage, git integration and intelligent proxying to quickly bring user flows to life.
Cost / License
- Free Personal
- Proprietary
Platforms
- Mac
- Windows
- Linux
- Self-Hosted
- Software as a Service (SaaS)
United States


Free desktop API mocking platform. Create HTTP/REST and WebSocket mock servers with a modern UI. Perfect for developers, QA teams, and trainers.
Cost / License
- Free
- Proprietary
Platforms
- Mac
- Windows
- Linux
- Global

A modern, solo-developer-built mock API platform to create CRUD resources instantly and test frontend resilience with integrated "Chaos Mode" simulations.
Cost / License
- Free
- Proprietary
Platforms
- Online
- Software as a Service (SaaS)


+2
Mocklets is a HTTP-based mock API simulator, which helps simulate APIs for faster parallel development and more comprehensive testing.
Cost / License
- Paid
- Proprietary
Platforms
- Software as a Service (SaaS)


A fake SMTP server for e-mail integration testing. We capture all the e-mails we receive and make them available via our website and REST API.
Cost / License
- Free
- Proprietary
Platforms
- Online
intercept.rest is a tool which helps to debug and mock REST APIs Similar to the Network tab in Chrome Dev Tools but works for any API, Mobile apps, webhooks, frontend etc.
Cost / License
- Freemium
- Proprietary
Platforms
- Mac
- Windows
- Linux
- Software as a Service (SaaS)











































