Dev tools · alternatives · 2026

24 alternatives to Feature flags on the edge, with Haskell and Rust

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Feature flags on the edge, with Haskell and Rust launched in 2022; newer entries below may have overtaken it.

1
Maybe Haskell▲60
See what it’s like to program in a language without null.
2015 · books.thoughtbot.com · its alternatives →
2CS
Code search for Rust, Ruby, Haskell – with regex support▲5
2019 · codesearch.aelve.com · its alternatives →
3HS
Halcyon – System for installing Haskell apps▲6
2015 · halcyon.sh · its alternatives →
4
A REPL for practising bitwise operations, written in Rust▲5
2017 · github.com · its alternatives →
5
FFlags – Feature flags as code, served from the edge▲42
Hi HN, I'm the creator of FFlags. I built this because I wanted a feature flagging system that gave me the performance and reliability of an enterprise-scale solution without the months of dev time or the vendor lock-in. The core ideas are: 1. Feature Flags as Code: You define your flag logic in TypeScript. This lets you write complex rules, which felt more natural as a developer myself than using a complex UI for logic. 2. Open Standard: The platform is built on the OpenFeature standard (specifically the Remote Evaluation Protocol). The goal is to avoid vendor lock-in and the usual…
2025 · fflags.com · its alternatives →
6
Encrusted – A Zork Interpreter Written in Rust / WebAssembly▲6
2018 · sterlingdemille.com · its alternatives →
7SB
SwitchKeeper – Boringly simple feature flags▲6
2022 · switchkeeper.com · its alternatives →
8AS
A smart Django/Node code generator written in Haskell▲7
2021 · app.imagine.ai · its alternatives →
9
Rust 1.0▲6
A high-level, safe and concurrent alternative to C++
2015 · rust-lang.org · its alternatives →
10
Maelstrom – A Hermetic, Clustered Test Runner for Rust (and It's Fast)▲6
2024 · maelstrom-software.com · its alternatives →
11AP
A Python Web Framework with Rust Runtime▲5
2022 · sanskar.me · its alternatives →
12
Lambda Lessons▲6
Pattern-matching, first-class functions, and more in Haskell
2014 · stevekrouse.github.io · its alternatives →
13
GameLisp, a scripting language for Rust game development▲5
2020 · gamelisp.rs · its alternatives →
14IA
Implementing a Lispy Language in Haskell: Part 1▲6
Software Engineer in New York specializing in Apple platforms
2015 · harlanhaskins.com · its alternatives →
15
A more idiomatic flags package for subcommands in Go▲5
2018 · ericgreer.info · its alternatives →
16
Rusdantic▲5
A unified, high-performance data validation and serialization framework for Rust, inspired by Pydantic's ergonomics and powered by Serde.
Mar 2026 · github.com · its alternatives →
17SA
SwitchFeat – An open source feature flags and A/B testing platform▲9
2023 · switchfeat.com · its alternatives →
18AT
A template engine for Node.js that treats templates as modules▲6
2019 · producthunt.com · its alternatives →
19
Stencil▲9
A Compiler for Web Components
2017 · stenciljs.com · its alternatives →
20
A Haskell programmable-CAD environment, in the browser with WASM▲6
Interactive Haskell Powered CAD Playground
Jul 2026 · doscienceto.it · its alternatives →
21LW
Letlang, written in Rust, targeting Rust, now has a specification▲8
2024 · david-delassus.medium.com · its alternatives →
22
Taetype – a complete font engine for Rust and WASM▲5
Jul 2026 · github.com · its alternatives →
23TL
TinyToggle – Lightweight feature flags for devs and small teams▲6
2025 · tinytoggle.com · its alternatives →
24
Haskell GHC JavaScript Code Minification Report▲7
2024 · blog.haskell.org · its alternatives →

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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 →