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.NET

The modern, innovative, open-source programming language for building all your apps.

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C# is a modern, innovative, open-source, cross-platform object-oriented programming language and one of the top 5 programming languages on GitHub. It is loved by developers and trusted by enterprise, with hundreds of thousands of companies worldwide using it across industries like media, finance, healthcare, gaming, and more.

12 alternatives to .NET

Ranked by how well each tool replaces .NET: shared features, audience, price and popularity.

  1. Swift

    Swift is a general-purpose programming language built using a modern approach to safety

    Covers 3 of 15 key features.

    Open source
    59 out of 100 match—

  2. .NET Fiddle

    Test your C# code online with .NET Fiddle code editor.

    Covers 0 of 15 key features.

    58 out of 100 match—

  3. CodeLite

    A free, open source, cross-platform IDE for C, C++, Rust, PHP and Node.js

    Covers 1 of 15 key features.

    Free planOpen source
    58 out of 100 matchFree

  4. B4X

    Cross-platform programming language

    Covers 2 of 15 key features.

    Free planOpen source
    57 out of 100 matchContact sales

  5. Dart

    Dart: An approachable, portable, and productive language for high-quality apps on any pla

    Covers 1 of 15 key features.

    Open source
    56 out of 100 match—

  6. OpenCode

    The open source AI coding agent

    Covers 1 of 15 key features.

    Free planOpen source
    56 out of 100 matchFree

  7. Clojure

    A robust, practical, and fast programming language combining approachability of scripting,

    Covers 2 of 15 key features.

    Open source
    56 out of 100 match—

  8. Free Pascal

    Open source compiler for Pascal and Object Pascal

    Covers 2 of 15 key features.

    Open source
    55 out of 100 match—

  9. Brackets

    Now Phoenix Code | Free Open Source Code Editor with Live Preview

    Covers 2 of 15 key features.

    Free planOpen source
    55 out of 100 matchContact sales

  10. Inform

    A natural-language-based programming language for writers of interactive fiction.

    Covers 2 of 15 key features.

    Free planOpen source
    55 out of 100 matchContact sales

  11. D Programming Language

    D is a general-purpose programming language with static typing, systems-level access, and

    Covers 1 of 15 key features.

    Open source
    55 out of 100 match—

  12. PureBasic

    A modern BASIC programming language for Windows, Linux, OS X and Raspberry Pi

    Covers 1 of 15 key features.

    54 out of 100 matchContact sales