Bogus VS FsCheck

Compare Bogus vs FsCheck and see what are their differences.


:card_index: A simple fake data generator for C#, F#, and VB.NET. Based on and ported from the famed faker.js. (by bchavez)
Our great sponsors
  • SonarLint - Clean code begins in your IDE with SonarLint
  • InfluxDB - Build time-series-based applications quickly and at scale.
  • SaaSHub - Software Alternatives and Reviews
Bogus FsCheck
17 11
6,689 1,033
- 0.4%
4.6 4.9
7 days ago 3 months ago
C# F#
GNU General Public License v3.0 or later BSD 3-clause "New" or "Revised" License
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 Bogus. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-01-21.
  • Using EF Core and Bogus
    2 projects | | 21 Jan 2023
    Going forward, the secret to knowing were to find data is to read Bogus information in the readme file which goes into depth were to find paths to generate data. This is very important as you can clash with their classes e.g. you create a Person class and guess what, Bogus has a Person class. This is were knowing how to work with using statements and using statements with aliasing.
  • Learn DateOnly & TimeOnly
    7 projects | | 15 Jan 2023
    Code samples for which as of version 13.0.2 now supports DateOnly and TimeOnly. Three code samples are used to show interactions with Bogus and Microsoft.Data.SqlClient which is most likely used to work with json data.
  • Is there a tool that could be used to generate fake unit test cases automatically for code coverage? (read description before downvoting)
    2 projects | | 19 May 2022
    In terms of generating test cases, I've come across this before:
  • Help me find this library
    2 projects | | 27 Mar 2022
    I used a .Net library a few years ago to create random text for a bunch of fake email bodies. It wasn't "lorem ipsum" type text, but full sentences and paragraphs. It would produce text that sounded like it came from a bullshit consulting handbook, or an intentionally obtuse technical description....things like, "Though vague in purpose the participant reality substituted reactional nature while in strongest thought vertices coincided with ...." and so on. I think it was somehow tied to Bogus but I can't seem to find it anywhere. Anyone able to help me out here?
  • Some useful Libraries for .NET projects
    6 projects | | 2 Oct 2021
    Bogus Github Nuget: Install-Package Bogus -Version 33.1.1
  • My first NuGet package: Fluent Random Picker
    4 projects | | 27 Jun 2021
    Seems like a fun package but I prefer Bogus
  • String similarity search and fast LIKE operator using pg_trgm
    2 projects | | 11 May 2021
    I inserted 10M rows of fake data generated by Bogus into the table. You can download the dump here.
  • Comparison between TypeORM and Entity Framework with LINQ
    2 projects | | 16 Mar 2021
    What is Bogus and Faker? They are libraries randomly to create a variety of dummy data such as human name, address, date and product/company name etc. = reduce our boring time of generating dummy records and have testing cases with multiple dummy values instead of our static ones.


Posts with mentions or reviews of FsCheck. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-05-19.
  • Is there a tool that could be used to generate fake unit test cases automatically for code coverage? (read description before downvoting)
    2 projects | | 19 May 2022 can hopefully generate random inputs automatically or with low effort for many methods to get your code coverage up. You don’t even need to write real tests right now, just call the methods with the random inputs and check they don’t fail.
  • Typesafe F# configuration binding
    4 projects | | 28 Nov 2021
    At Symbolica we're building a symbolic execution service that explores every reachable state of a user's program and verifies assertions at each of these states to check that the program is correct. By default it will check for common undefined behaviours, such as out-of-bounds memory reads or divide by zero, but it can also be used with custom, application specific, assertions too just like the kind you'd write in a unit test. Seen from this perspective it's kind of like FsCheck (or Haskell's QuickCheck or Python's Hypothesis), but much more exhaustive and without the randomness.
  • Does anybody know a simple algorithm for generating unit tests given a function's code?
    7 projects | | 26 Jul 2021
    Maybe something like QuickCheck, a quick search gave me this library for .NET
  • When do you consider your unit tests be "enough"?
    4 projects | | 16 Jun 2021
    Because of the above I've generally been using tools like Stryker.NET and FsCheck to augment my testing suite. I'm still doing unit testing to find the more obvious "I haven't had my coffee, let's make sure I'm doing what I think I'm doing" bugs. I'm just using things like mutation testing, property testing, fuzzing, etc. to find the deeper issues in my code. There's a ton of libraries out there, including one that I've built for myself to help with testing but FsCheck and Stryker are just beautiful. And if you're interested in fuzzing, SharpFuzz is a great option. But that one isn't quite as easy of an on ramp compared to the other two that I mentioned.
  • What are you working on? (2021-06)
    4 projects | | 1 Jun 2021
    Looks cool. Is there a reason why you didn't use FsCheck or Hedgehog? They're built to generate random data for testing, and can return the seed if a test fails so you can rerun the test with the exact same data once you figure out what the problem is - which is useful if the failure condition is rare.
  • Mutation Testing
    5 projects | | 13 Apr 2021
    Haskell has QuickCheck and Hedgehog, and dotnet has both as well. F# is favored, but there's C# interop.
  • In praise of property-based testing
    6 projects | | 12 Jan 2021
    FsCheck is probably most popular

What are some alternatives?

When comparing Bogus and FsCheck you can also consider the following projects:

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.

faker-cs - C# port of the Ruby Faker gem (

Moq - Repo for managing Moq 4.x

NBuilder - Rapid generation of test objects in .NET

GenFu - GenFu is a library you can use to generate realistic test data. It is composed of several property fillers that can populate commonly named properties through reflection using an internal database of values or randomly created data. You can override any of the fillers, give GenFu hints on how to fill them.

FakeItEasy - The easy mocking library for .NET

NSubstitute - A friendly substitute for .NET mocking libraries.

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

NUnit - NUnit 3 Framework

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

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.