# obsidiansystems/obelisk

Functional reactive web and mobile applications, with batteries included.

Repository: https://github.com/obsidiansystems/obelisk
Canonical: https://ross.abutalabs.com/products/obelisk
Homepage: https://reflex-frp.org
Language: Haskell
License: NOASSERTION
License Family: other
Topics: haskell, ios, android, web, obelisk, full-stack
Last push: 2026-08-26T11:13:44+00:00

## Health v2 (maintenance only)
Score: 67/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 8, longevity 100
- inputs: {"age_days": 3025, "days_push": 7, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1035, forks 114 (observed 2026-08-28T04:03:19.056457+00:00)

## What it is
Obelisk is a batteries-included full-stack framework for building functional reactive web and mobile applications in Haskell using Reflex/Reflex-DOM. It provides a curated, opinionated toolchain (backed by Nix) that lets a single Haskell codebase target web, iOS, and Android with rapid development and deployment workflows.

## Use cases
- build a web and mobile app from one haskell codebase
- functional reactive programming for web uis
- full-stack haskell web framework with nix
- deploy a reflex app to ec2
- share types between frontend and backend in haskell
- build ios and android apps in haskell

## When to choose
- your team knows Haskell and Reflex/Reflex-DOM
- you want one codebase for web, iOS, and Android
- you want an opinionated, batteries-included stack instead of assembling tools yourself
- you value end-to-end type safety across client and server

## When to avoid
- you or your team don't know Haskell
- you need a mainstream ecosystem with large hiring pools and community libraries
- you want fine-grained control over every technology choice
- you're building a simple static site or a non-reactive app

## Facets
- artifact type: framework
- maturity: active
- function: web-framework, mobile-framework, frontend-framework, build-tool, deployment
- domain: web-development, mobile-development, cross-platform
- platform: -
- tags: haskell, reflex-frp, full-stack, nix, functional-reactive-programming, reflex-dom, shared-codebase, functional-programming, web-server, ios, android, linux, macos

## Member repositories
- obsidiansystems/obelisk (main) score 67

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:19.056457+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:05:09.865457+00:00, confidence not recorded.
  - readme: https://github.com/obsidiansystems/obelisk (fetched 2026-08-28T04:03:19.056457+00:00, sha f33ebd5cac27)
  - homepage: https://reflex-frp.org (fetched 2026-08-29T13:05:43.818789+00:00, sha 36ae7a711f52)
- Data as of 2026-08-30T08:39:29.467469+00:00.