Dev tools · alternatives · 2026

24 alternatives to CompileX

Sandboxed code execution environment for multiple languages

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1. 1
   myCompiler▲122

   Run your favourite programming languages online

   2019 · mycompiler.io · its alternatives →

2. 2
   Run – a CLI universal code runner I built while learning Rust▲96

   Hi HN — I’m learning Rust and decided to build a universal CLI for running code in many languages. The tool, Run, aims to be a single, minimal dependency utility for: running one-off snippets (from CLI flags), running files, reading and executing piped stdin, and providing language-specific REPLs that you can switch between interactively. I designed it to support both interpreted languages (Python, JS, Ruby, etc.) and compiled languages (Rust, Go, C/C++). It detects languages from flags or file extensions, can compile temporary files for compiled languages, and exposes a unified REPL…

   2025 · github.com · its alternatives →

3. 3
   PythonSandbox▲157

   Write, run, debug, embed and share your Python code

   2022 · its alternatives →

4. 4
   Openleetcode – Local LeetCode runner where tests live in the repo▲73

   You write a standard solution, just like on LeetCode, and run it through the CLI. It identifies the problem by ID or title, executes your code against local test cases, and shows the result. It currently supports around 1.4k problems and multiple languages, including Python, C++, Rust, Java, Go, TypeScript, Swift, and others. The project is still an MVP. System design, SQL, and concurrency problems are not supported yet, but support for more problem types is planned. Made in Haskell!

   Aug 2026 · github.com · its alternatives →

5. 5
   Flox 1.0 – Open-source dev env as code with Nix▲382

   Hey HN, I'm Ron Efroni, CEO at Flox, and today we are releasing version 1.0 of our open source CLI, helping folks manage development environments everywhere.My own experience with development environments began with air-gapped systems, having to actually burn software to a CD to iterate over a very slow and expensive development cycle, sometimes reaching the server rack and realizing I have the wrong disk.... Fast forward to today and there are countless alternatives available backed by incredible compute resources, yet we somehow still find ourselves paying the price of long development…

   2024 · github.com · its alternatives →

6. 6CC
   Chunk – Code sandbox for back-end devs▲96

   Chunk co-founder here. We spent the last 2 weeks building this to scratch our own itch: As developers, we often have problems that could be solved just by running a few lines of code. Sometimes, running this code on your local machine is fine. But other time, the code need to run automatically reacting to external events or to run continuously, which means, it needs to run on a server somewhere. So now, you have to find a cloud provider, to package or build the code and finally to deploy it. All of that for what could be literally be 4 lines of code. We couldn’t find an easier way to do…

   2022 · chunk.run · its alternatives →

7. 7SJ
   Sandbox.js - Run user code in a sandboxed environment▲31

   2012 · engineering.versal.com · its alternatives →

8. 8
   Sandboxing untrusted code using WebAssembly▲76

   Hi everyone, I built a runtime to isolate untrusted code using wasm sandboxes. Basically, it protects your host system from problems that untrusted code can cause. We’ve had a great discussion about sandboxing in Python lately that elaborates a bit more on the problem [1]. In TypeScript, wasm integration is even more natural thanks to the close proximity between both ecosystems. The core is built in Rust. On top of that, I use WASI 0.2 via wasmtime and the component model, along with custom SDKs that keep things as idiomatic as possible. For example, in Python we have a simple decorator:…

   Feb 2026 · github.com · its alternatives →

9. 9
   Flox▲375

   Hey Everyone! Ron here, part of the NixOS Foundation and building Flox. Just coming out of this years NixCon and pretty excited to show hn below :) As of today, NVIDIA officially recognizes Canonical, SUSE, CIQ, and Nix—via Flox—as supported distributors for CUDA. Full blog - https://developer.nvidia.com/blog/developers-can-now-get-cud... This is a huge win for the Nix community. For years, CUDA on Nix was possible but painful—builds could take hours, and redistributing prebuilt binaries was blocked by NVIDIA's licensing requirements. NVIDIA's growing engagement with key…

   2024 · flox.dev · its alternatives →

10. 10
    How to compile C/C++ for WASM, pure Clang, no libs, no framework▲217

    A little help for programmers, who wants to run C/C++ code in the browser. (This is my second attempt to show it, first time I got banned bcoz of my personal page domain, I don't really understand it why is is suspicious.)

    2022 · github.com · its alternatives →

11. 11
    Execute JavaScript in a WebAssembly QuickJS sandbox▲206

    This TypeScript package allows you to safely execute JavaScript code within a WebAssembly sandbox using the QuickJS engine. Perfect for isolating and running untrusted code securely, it leverages the lightweight and fast QuickJS engine compiled to WebAssembly, providing a robust environment for code execution. Features - *Security*: Run untrusted JavaScript code in a safe, isolated environment. - *File System*: Can mount a virtual file system - *Custom Node Modules*: Custom node modules are mountable - *Fetch Client*: Can provide a fetch client to make http(s) calls - *Test-Runner*: Includes…

    2024 · github.com · its alternatives →

12. 12IW
    I wrote a .NET to JS compiler. Here's an XNA demo compiled to JS.▲103

    2011 · hildr.luminance.org · its alternatives →

13. 13
    Code Compiler API ▲9

    Real-time code compilation for 15+ languages

    2024 · rapidapi.com · its alternatives →

14. 14
    MCP Server for secure code execution (Python, Ruby, C, and more)▲7

    Sandboxed runtime for programming languages and WASI binaries. Works in the browser, on your server, or via MCP. - runno/packages/mcp at main · taybenlor/runno

    2025 · github.com · its alternatives →

15. 15
    YepCode▲157

    Hey HN, We’re excited to introduce YepCode Run, a serverless runtime and SDK for executing code in secure sandboxes. Built on top of YepCode (https://yepcode.io), it allows you to execute code without any setup or installation. Perfect for: * Running AI-generated code – Securely in a sandbox environment, enabling fully autonomous AI agents. * Package Exploration – Try npm or PyPI packages without installing them locally. * Code Sharing – Easily share runnable code examples with others. * Quick Prototyping – Test snippets and algorithms on the fly. Just write or paste your code, and…

    2022 · yepcode.io · its alternatives →

16. 16CF
    CLI for executing code in many different languages with Docker▲64

    2015 · docker-exec.github.io · its alternatives →

17. 17
    Sandy – A tiny Sandbox to run untrusted code ️▲64

    A tiny "sandbox" to run untrusted code 🏖️. Contribute to craigmulligan/sandy development by creating an account on GitHub.

    2020 · github.com · its alternatives →

18. 18
    Zerobox – Sandbox any command with file, network, credential controls▲141

    I'm excited to introduce Zerobox, a cross-platform, single binary process sandboxing CLI written in Rust. It uses the sandboxing crates from the OpenAI Codex repo and adds additional functionalities like secret injection, SDK, etc. Watch the demo: https://www.youtube.com/watch?v=wZiPm9BOPCg Zerobox follows the same sandboxing policy as Deno which is deny by default. The only operation that the command can run is reading files, all writes and network I/O are blocked by default. No VMs, no Docker, no remote servers. Want to block reads to /etc? zerobox…

    Mar 2026 · github.com · its alternatives →

19. 19
    C++ runtime/compile-time detection in constexpr functions▲83

    An approach for runtime detection inside a constexpr function - SaadAhmad/in_constexpr

    2017 · github.com · its alternatives →

20. 20
    CodePile▲71

    A simple, free & rich collaborative code sharing experience

    2020 · codepile.net · its alternatives →

21. 21
    Docker in the browser using x86-to-WASM recompilation▲119

    Run KolibriOS, Linux or Windows 98 in your browser

    2022 · copy.sh · its alternatives →

22. 22DC
    Devbox – Containers for better dev environments▲116

    I've been frustrated with dependency hell and clutter on my VPS from dev, so I built Devbox: a lightweight, open-source CLI tool that spins up isolated development environments using Docker. Each project runs in its own container, but your code stays in simple flat folders on the host machine—no messing with volumes or sync issues. Environments are disposable, so you can nuke and recreate them without losing your work. Key features: - Instant setup: `devbox init my-project` and you're in a fresh env with `devbox shell`. - Configurable via JSON: Define packages, services, and more in a…

    2025 · devbox.ar0.eu · its alternatives →

23. 23
    Open-source in-browser code editor/executor with REPL, 10+ languages▲29

    I am super excited to open-source the code executor behind logicboard.com - an in-browser collaborative code editor. The backend is written in Elixir+Phoenix and implements a WebSocket API to execute code in docker containers. Next steps include making this more secure, I am considering Google's gVisor to implement better isolation between containers and the host kernel.

    2023 · github.com · its alternatives →

24. 24AP
    A playground for in-browser interpreters▲79

    2015 · fatiherikli.github.io · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →