Life & fun · alternatives · 2026

24 alternatives to Online Haskell REPL

We heard your requests for Haskell and today we're excited to finally announce Haskell as yet another language we support. We've decided to put our focus...

Online Haskell REPL is a browser-based environment for writing and executing Haskell code on Replit. It allows users to write functional programs directly in their browser without local installation. The tool functions… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Online Haskell REPL launched in 2017; newer entries below may have overtaken it.

1. 1
   Repl.it▲399

   Code and deploy apps in any language right from your browser

   2018 · replit.com · its alternatives →

2. 29H
   99 Haskell – Solve live Haskell coding problems in the browser▲10

   2015 · 99haskell.org · its alternatives →

3. 3
   repl.it — A client-side web REPL for 15+ languages▲27

   Describe what you want. Replit builds it. Get a working app or website in minutes. No coding required.

   2011 · repl.it · its alternatives →

4. 4SI
   Subth.ink – write something and see how many others wrote the same▲92

   Hey HN, this is a small Haskell learning project that I wanted to share. It's just a website where you can see how many people write the exact same text as you (thought it was a fun idea). It's built using Scotty, SQLite, Redis and Caddy. Currently it's running in a small DigitalOcean droplet (1 Gb RAM). Using Haskell for web development (specifically with Scotty) was slightly easier than I thought, but still a relatively hard task compared to other languages. One of my main friction points was Haskell's multiple string-like types: String, Text (& lazy), ByteString (& lazy), and each library…

   Jan 2026 · subth.ink · its alternatives →

5. 5
   repl.it▲109

   Online code repl for pretty much any language.

   2015 · replit.com · its alternatives →

6. 6
   I built a poker site with Haskell▲157

   🂺 A Multiplayer Poker App Crafted with Haskell and React - therewillbecode/poker-maison

   2019 · github.com · its alternatives →

7. 7
   Haskell for Mac▲81

   Functional programming without the hassle.

   2015 · haskellformac.com · its alternatives →

8. 8
   Pascal to LLVM Compiler in Haskell▲61

   A Pascal to LLVM compiler in Haskell . Contribute to sam46/Paskell development by creating an account on GitHub.

   2020 · github.com · its alternatives →

9. 9
   Learn Functional Programming Using Haskell▲220

   Get the skills to land a job in the tech industry in BloomTech’s online programs. Learn about our Tuition Refund Guarantee!

   2016 · lambdaschool.com · its alternatives →

10. 10
    Custom Haskell handlers for Nginx▲98

    This is rather a mature project. It began out of curiosity: I wanted to test if Haskell FFI was powerful and expressive enough to interconnect C and Haskell code flawlessly. Particularly, if C strings generated inside Nginx can be shared within Haskell code and what must be done to respect their lifetimes etc. Recently, I released version 3.2.0 with revamped README (with a lot of examples) and a new approach to building Haskell handlers using the modernized cabal v2-build for dependencies.

    2023 · github.com · its alternatives →

11. 11SH
    Simplexhc – Haskell to LLVM compiler (design phase)▲55

    2017 · pixel-druid.com · its alternatives →

12. 12RC
    Replify – Create a REPL for any command▲112

    GitHub Gist: instantly share code, notes, and snippets.

    2016 · gist.github.com · its alternatives →

13. 13HO
    Haskell on Heroku – Buildpack for deploying Haskell apps▲148

    2015 · haskellonheroku.com · its alternatives →

14. 14
    Repl.it Chrome▲173

    Run code anywhere, with just a click 🖱️

    2019 · chromewebstore.google.com · its alternatives →

15. 15
    Minimal Lisp in ~70 lines of Haskell▲76

    GitHub Gist: instantly share code, notes, and snippets.

    2011 · gist.github.com · its alternatives →

16. 16
    I Ported GHC Haskell Compiler to Windows 11 ARM. MC Gift▲9

    Merry Christmas, everyone! Now you can compile Haskell code on Windows 11 ARM. It will run full speed if you use UTM/QEmu on Apple silicon. :-) It's a very draft version, but it works well. Any ideas?

    2024 · gitlab.haskell.org · its alternatives →

17. 17
    IHP, a batteries-included web framework built on Haskell and Nix▲280

    IHP is the Haskell web framework for agentic engineering. Your agent writes the code; typed SQL, generated schema types and compile-checked views prove it works.

    2020 · ihp.digitallyinduced.com · its alternatives →

18. 18RB
    Rendering black holes with Haskell▲88

    2016 · flannelhead.github.io · its alternatives →

19. 19
    Shelgon: A Framework for Building Interactive REPL Shells in Rust▲130

    I've been working on Shelgon, a framework that lets you build your own custom REPL shells and interactive CLI applications in Rust. You can use Shelgon to: - Create a custom shell with only a few lines of code - Build interactive debugging tools with persistent state between commands - Develop domain-specific language interpreters with shell-like interfaces - Add REPL capabilities to existing applications Getting started is straightforward - implement a single trait that handles your command execution logic, and Shelgon takes care of the terminal UI, input handling, and async runtime…

    2025 · github.com · its alternatives →

20. 20
    Miso – A Haskell implementation of Elm▲114

    :ramen: A tasty Haskell web and mobile framework. Contribute to dmjio/miso development by creating an account on GitHub.

    2017 · github.com · its alternatives →

21. 21
    Codec-beam – Generate Erlang VM byte code from Haskell▲53

    Generate Erlang VM byte code from Haskell. Contribute to kofigumbs/codec-beam development by creating an account on GitHub.

    2018 · github.com · its alternatives →

22. 22IB
    I built an online programming language▲67

    2021 · codigo.so · its alternatives →

23. 23
    Replit Code V1.5 3B▲120

    A new code generation language model

    2023 · replit.com · its alternatives →

24. 24
    Legion, an as-simple-as-possible blockchain server written in Haskell▲239

    Simple blockchain server written in Haskell for educational purposes - aviaviavi/legion

    2017 · github.com · 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 →