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Reason Alternatives
Similar projects and alternatives to reason
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llvm-project
The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.
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Nim
Nim is a statically typed compiled systems programming language. It combines successful concepts from mature languages like Python, Ada and Modula. Its design focuses on efficiency, expressiveness, and elegance (in that order of priority).
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rescript
ReScript is a robustly typed language that compiles to efficient and human-readable JavaScript.
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Oberon
Oberon parser, code model & browser, compiler and IDE with debugger, and an implementation of the Oberon+ programming language
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rocq
The Rocq Prover is an interactive theorem prover, or proof assistant. It provides a formal language to write mathematical definitions, executable algorithms and theorems together with an environment for semi-interactive development of machine-checked proofs.
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NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a better reason alternative or higher similarity.
reason discussion
reason reviews and mentions
Posts with mentions or reviews of reason.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2025-09-14.
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Gleam is my new obsession
Reason (https://reasonml.github.io/) is the JS like syntax for OCaml.
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A 10x Faster TypeScript
OCaml and Haskell already have that nice type system (and even more nice). If OCaml's syntax bothers you, there is Reason [1] which is a different frontend to the same compiler suite.
Also in this space is Gleam [2] which targets Erlang / OTP, if high concurrency and fault tolerance is your cup of tea.
[1]: https://reasonml.github.io/
[2]: https://gleam.run/
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An Ode to TypeScript Enums
When I see this it makes me want to run for ReasonML/ReScript/Elm/PureScript.
Sum types (without payloads on the instances they are effectively enums) should not require a evening filling ceremonial dance event to define.
https://reasonml.github.io/
https://rescript-lang.org/
https://elm-lang.org/
https://www.purescript.org/
(any I forgot?)
It's nice that TS is a strict super set of JS... But that's about the only reason TS is nice. Apart from that the "being a strict super set" hampers TS is a million and one ways.
To my JS is too broken to fix with a strict super set.
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Ask HN: What less-popular systems programming language are you using?
> The syntax is also not very friendly IMO.
Very true. There's an alternate syntax for OCaml called "ReasonML" that looks much more, uh, reasonable: https://reasonml.github.io/
- How Jane Street accidentally built a better build system for OCaml
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OCaml Syntax Sucks
I wish they would update their blog![0] The last post is from Aug. 2018, which definitely gives the impression that the project is dead.
But it's not dead, if you look at their GitHub.[1]
[0] https://reasonml.github.io/blog/
[1] https://github.com/reasonml/reason
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Comparing OCaml and Standard ML (2020)
OCaml makes so much sense to me -- it's just a shame that the syntax has some weird decisions.
I wish ReasonML (https://reasonml.github.io/) would come back -- it's a new syntax for the same language, kind of an Elixir/Erlang thing.
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ReScript has come a long way, maybe it's time to switch from TypeScript?
Ocaml is still a wonderful language if you want to look into it, and Reason is still going strong as an alternate syntax for OCaml. With either OCaml or Reason you can compile to native code, or use the continuation of BuckleScript now called Melange.
- Learning Elm by porting a medium-sized web front end from React (2019)
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Melange for React devs book, alpha release
Hey HN, at Ahrefs we have been working on an online book that hopefully helps React developers get up and running with Melange, an OCaml to JavaScript compiler. You can read more about Melange here: https://melange.re/.
There are still a few chapters that we'd like to add before considering it "complete", but it might be already helpful for some folks out there, that's why we decided to publish it early.
The book uses Reason syntax to implement React components using ReasonReact components. You can read more about both in:
https://reasonml.github.io/
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A note from our sponsor - SaaSHub
www.saashub.com | 15 Jul 2026
Stats
Basic reason repo stats
54
10,312
8.0
23 days ago
reasonml/reason is an open source project licensed under MIT License which is an OSI approved license.
reason is marked as "self-hosted". This means that it can be used as a standalone application on its own.
The primary programming language of reason is OCaml.
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