Kotest vs NUnit
Kotest
kotest.io
NUnit
nunit.orgSide by side
| Figure | Kotest | NUnit |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | — | Yes |
| Self-hosted | — | Yes |
| Plans published | 1 | 1 |
| Spec score · Unit Testing | 7.9 (#12) | 7.8 (#13) |
| Spec score · Unit Testing Frameworks | 7.9 (#15) | 7.8 (#19) |
| Security and compliance | The opened Kotest pages do not state security certifications or compliance claims. | The pages reviewed state the MIT license and project governance, but do not state security certifications or compliance attestations. |
Plans
In their own words
Kotest
Kotest is a Kotlin testing framework for JVM and Kotlin Multiplatform projects, with test styles, assertions and property testing. Its styles allow natural-language test names and unlimited nesting. The DSL supports parameterized and data-driven tests, conditional evaluation, lifecycle callbacks and parallel execution. The assertion library includes over 350 matchers, collection inspectors, soft assertions and utilities for non-deterministic code. Property tests can generate hundreds or thousands of inputs, and property testing is supported across all targets. Listed targets include JVM, JavaScript, Native, Wasm and Android unit and instrumented tests; Native includes Linux, Windows, iOS and macOS. Setup instructions cover Gradle, Maven and Kotlin Multiplatform projects. Integrations include Spring, Koin, Ktor, Allure, Testcontainers, WireMock and Micronaut. An IntelliJ plugin provides test run icons, editor results, a test explorer, structure highlighting and breadcrumbs. Kotest is free, with a free plan and no free trial. Its assertions library can also be used with JUnit, Spock or another test framework.
NUnit
NUnit is a unit-testing framework for .NET languages, with supported languages listed as C#, VB.NET, F#, and C++. NUnit 3 and later releases use the MIT license, which permits free use in commercial and noncommercial applications and libraries. NUnit 5 adds attributes for declaring dependencies between tests and fixtures. Its Repeat feature can set a required pass percentage from 1 to 100 and optionally stop once the outcome is determined. NUnit 5 ships builds targeting net462, net8.0, and net10.0. Installation options include project templates for Visual Studio, Visual Studio Code, and Rider, along with the dotnet new nunit command; release packages are available through NuGet and GitHub. The Visual Studio template references the NUnit Test Adapter, NUnit Analyzer, Microsoft Test SDK, and coverlet code coverage package. Documentation describes automated runs on clean machines, including Azure DevOps and GitHub Actions build agents. The project is supported by the .NET Foundation and maintained by a core team and community contributors.