Moq VS Fluent Assertions

Compare Moq vs Fluent Assertions and see what are their differences.


Repo for managing Moq 4.x [Moved to:] (by moq)

Fluent Assertions

A very extensive set of extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style unit tests. Targets .NET Framework 4.7, as well as .NET Core 2.1, .NET Core 3.0, .NET 6, .NET Standard 2.0 and 2.1. Supports the unit test frameworks MSTest2, NUnit3, XUnit2, MSpec, and NSpec3. (by fluentassertions)
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Moq Fluent Assertions
27 8
5,215 3,626
- 1.7%
6.6 9.5
11 months ago 5 days ago
C# C#
GNU General Public License v3.0 or later Apache License 2.0
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.


Posts with mentions or reviews of Moq. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-05-27.

Fluent Assertions

Posts with mentions or reviews of Fluent Assertions. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-12-20.
  • Integration tests without API dependencies with ASP.NET Core and WireMock.Net
    5 projects | | 20 Dec 2022
  • [Parte 8] ASP.NET Core: Integration Tests
    4 projects | | 13 Apr 2022
    FluentAssertions para Asserts muy flexibles y entendibles
  • BREAKING!! NPM package ‘ua-parser-js’ with more than 7M weekly download is compromised
    32 projects | /r/programming | 22 Oct 2021 That is simply not true. Mature c# projects purposely maintain no downstream dependencies and is they do, it's to a major reputable lib. See for yourself - these are staple third party packages commonly used. Anything dependency starting with System or NETStandard is Microsoft maintained.
  • ASP.NET Core Unit Testing with FluentAssertions
    3 projects | | 21 Aug 2021
    FluentAssertions is one of the most popular (over 66 million downloads on Nuget) .NET library that contains a large collection of .NET extension methods that allow .NET developers to write unit tests using a fluent syntax which is very easy to read and write and clearly shows the intent of the unit test. The library has extension methods to test almost everything related to .NET such as Strings, Booleans, Dates, Guids, Collections, Exceptions, and even Nullable Types. You can add this library to your unit test projects via Nuget package manager and start using this library in few minutes.
  • My first NuGet package: Fluent Random Picker
    4 projects | /r/csharp | 27 Jun 2021
    I love fluency. I myself work on a package for fluent programming. I recommend you using FluentAssertions for tests though. Nonetheless, keep working! Starred your repo.
  • Honk#! Honk in convenient C# now!
    5 projects | /r/csharp | 23 Jun 2021
    For example, all tests below this line are written in Honk# + FluentAssertions (the latter is an example of a library which also provides a lot of fluent methods for xUnit to perform assertions). Soon I'll be moving more of its (AngouriMath's) code to this style, as long as it doesn't harm readability and performance.
  • Cell CMS - Criando testes de maneira prática
    6 projects | | 31 Jan 2021
    fluentassertions / fluentassertions

What are some alternatives?

When comparing Moq and Fluent Assertions you can also consider the following projects:

FakeItEasy - The easy mocking library for .NET

Shouldly - Should testing for .NET—the way assertions should be!

NSubstitute - A friendly substitute for .NET mocking libraries.

NUnit - NUnit Framework

Bogus - :card_index: A simple fake data generator for C#, F#, and VB.NET. Based on and ported from the famed faker.js.

NFluent - Smooth your .NET TDD experience with NFluent! NFluent is an ergonomic assertion library which aims to fluent your .NET TDD experience (based on simple Check.That() assertion statements). NFluent aims your tests to be fluent to write (with a super-duper-happy 'dot' auto-completion experience), fluent to read (i.e. as close as possible to plain English expression), but also fluent to troubleshoot, in a less-error-prone way comparing to the classical .NET test frameworks. NFluent is also directly inspired by the awesome Java FEST Fluent assertion/reflection library (

AutoMoq - Auto mocking provider for Moq.

SpecFlow - #1 .NET BDD Framework. SpecFlow automates your testing & works with your existing code. Find Bugs before they happen. Behavior Driven Development helps developers, testers, and business representatives to get a better understanding of their collaboration

AutoFixture - AutoFixture is an open source library for .NET designed to minimize the 'Arrange' phase of your unit tests in order to maximize maintainability. Its primary goal is to allow developers to focus on what is being tested rather than how to setup the test scenario, by making it easier to create object graphs containing test data.

xUnit - is a free, open source, community-focused unit testing tool for .NET.

WireMock.Net - WireMock.Net is a flexible product for stubbing and mocking web HTTP responses using advanced request matching and response templating. Based on the functionality from, but extended with more functionality.