reflex VS obelisk

Compare reflex vs obelisk and see what are their differences.


Interactive programs without callbacks or side-effects. Functional Reactive Programming (FRP) uses composable events and time-varying values to describe interactive systems as pure functions. Just like other pure functional code, functional reactive code is easier to get right on the first try, maintain, and reuse. (by reflex-frp)


Functional reactive web and mobile applications, with batteries included. (by obsidiansystems)
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reflex obelisk
15 26
1,032 836
0.8% 1.1%
4.7 0.0
7 days ago 5 days ago
Haskell Haskell
BSD 3-clause "New" or "Revised" License BSD 3-clause "New" or "Revised" License
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.


Posts with mentions or reviews of reflex. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-05-06.
  • Interactive animations
    11 projects | | 6 May 2023
    FRP solutions sound very attractive. But reflex seems to be stuck on the outdated GHCJS, and I haven't been able to get it to build. The newer JS output in GHC doesn't yet have DOM support. And even if I used one of those, figuring out how to interact with a LaTeX renderer might be tricky.
  • The Quest for the Ultimate GUI Framework
    4 projects | | 22 Apr 2023
    I only have experience using Reflex, which I regard as the main contender for FRP UI libraries in the Haskell sphere. It's got a flashy website, but I think the documentation is a bit disorganized -- it took a long time for me to figure out how to get going with the library (you find some pieces of knowledge scattered here and there, if you look hard enough). My plan was to learn it well enough to onboard other people, but I don't think I could convince anyone who hasn't already decided that they're gonna make UIs in Haskell no matter the required effort.
  • Simple GHC stack for a novice
    6 projects | | 17 Oct 2022
    Once someone has spent a bunch of time with Haskell and sees the value, they will find Nix if it makes sense. Maybe they'll want to play with, or they'll discover they want a better way to package 3rd-party dependencies, or they start using NixOS and want to nix all the things, etc. etc. Or, maybe they'll never find a use for it, and that's okay.
  • Functional Reactive Programming
    9 projects | | 16 Aug 2022
  • Exploring ideas in Haskell
    3 projects | | 14 Jan 2022
    Now, I've been convinced to take another look at reflex. This quick reference seems very useful, most other resources seem to always discuss reflex-dom specifically. I'm not really interested in that.
  • Is Haskell capable of this?
    8 projects | | 25 Nov 2021
    Have a look at, or, they are an interesting and different way of working with UI in a non imperative way.
  • Why Do We Need Transpilation into JavaScript?
    6 projects | | 5 Apr 2021
    At present, here at Typeable we develop frontend in Haskell and use the web framework Reflex and the functional reactive programming (FRP). The source code in Haskell is transpiled into the JavaScript code using GHCJS.
  • Comparing Elm with Reflex
    5 projects | | 22 Mar 2021
    Reflex is the framework that allows creating reactive web applications in Haskell.
  • Discussion Thread
    5 projects | | 18 Mar 2021
    Also you’re the Haskell guy no? Found this while reading a Wikipedia article
  • Creating a Haskell Application Using Reflex. Part 1
    3 projects | | 15 Mar 2021
    Hi there! My name is Nikita. At Typeable, we develop frontend for some of our projects using the FRP approach, specifically, its Haskell implementation – reflex web-framework. The resources that offer guidelines for this framework are quite limited, so we decided to fill this gap more or less.


Posts with mentions or reviews of obelisk. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-01-10.
  • Why are haskell applications so obscure?
    7 projects | | 10 Jan 2023
    Regarding smartphone applications, I've recently been working on a simple application with Obelisk (, which uses GHCJS and is pretty usable once you've gotten into Reflex a bit, though it produces somewhat opaque type errors sometimes. I do not know though whether Obelisk can do anything beyond webview apps. If so, I do not know how yet.
    7 projects | | 10 Jan 2023
    You can make all those things in haskell, and I do professionally. Frontends (entirely in haskell), native IOS and Android applications, Servers, and Games. In fact the framework Obelisk does most of these all out of the box.
  • Any advice on making a mobile app using Haskell?
    2 projects | | 16 Dec 2022
    From researching seems like Obelisk might be the right tool for this, but wanted to know if others had built mobile apps in Haskell and their experience/advice if this is a good root to take?
    2 projects | | 16 Dec 2022
  • Building a Haskell CRUD stack with Obelisk for PowerZonePack
    3 projects | | 15 Dec 2022
    Thanks for the comment! We can honestly say that Obelisk is far from perfect, but we're continuously improving the project in our daily basics. And that's why we encourage you to start your adventure with the lib anew. If you still miss a guide to routing with Obelisk, please read this doc. Our team would be happy to answer your further question regarding Obelisk; feel free to email us anytime!
    3 projects | | 15 Dec 2022
    Thank you for your feedback; by writing this post, we wanted to familiarize the audience with using Haskell language as a universal, full-stack language. If you are interested in diving into more technical details, a good starting point would be to take a look at the Obelisk's codebase.
  • GitHub - NorfairKing/haskell-dependency-graph-nix
    2 projects | | 7 Dec 2022
    I also had a use case where I needed to extract the nix derivation dependencies of haskell packages:
  • Web development in Haskell
    7 projects | | 9 Aug 2022
    There's also GHCJS, with being (probably) the best choice, but personally I found it extremely tedious to set up a dev environment (not a nix guy) and there's also the learning curve of FRP.
  • The Big List of Haskell GUI Libraries
    8 projects | | 6 Jul 2022,
  • Monthly Hask Anything (July 2022)
    6 projects | | 1 Jul 2022
    I can't speak to the nicest way, as I haven't actually developed any Android apps with Haskell, but I've been meaning to give Obelisk a try.

What are some alternatives?

When comparing reflex and obelisk you can also consider the following projects:

reflex-platform - A curated package set and set of tools that let you build Haskell packages so they can run on a variety of platforms. reflex-platform is built on top of the nix package manager.

Elm - Compiler for Elm, a functional language for reliable webapps.

sodium - Sodium - Functional Reactive Programming (FRP) Library for multiple languages

dunai - Classic FRP, Arrowized FRP, Reactive Programming, and Stream Programming, all via Monadic Stream Functions

reflex-dom - Web applications without callbacks or side-effects. Reflex-DOM brings the power of functional reactive programming (FRP) to the web. Build HTML and other Document Object Model (DOM) data with a pure functional interface.

purescript - A strongly-typed language that compiles to JavaScript


rhine - Haskell Functional Reactive Programming framework with type-level clocks

vscode-ghc-simple - Simple GHC (Haskell) integration for VSCode

reflex-native - Framework for writing fully native apps using Reflex, a Functional Reactive Programming library for Haskell.


gi-gtk-declarative - Declarative GTK+ programming in Haskell