# roc-lang/roc

A fast, friendly, functional language.

Repository: https://github.com/roc-lang/roc
Canonical: https://ross.abutalabs.com/products/roc
Homepage: https://roc-lang.org
Language: Zig
License: UPL-1.0
License Family: other
Topics: functional-language, functional-programming, language, roc-lang
Last push: 2026-08-26T22:24:36+00:00

## Health v2 (maintenance only)
Score: 80/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 44, longevity 100
- inputs: {"age_days": 2782, "days_push": 7, "days_rel": 372, "gap_med": 27, "n_releases_24m": 4}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 6010, forks 412 (observed 2026-08-28T04:09:34.228816+00:00)

## What it is
Roc is a fast, friendly, functional programming language implemented in Zig, with a compiler toolchain that builds to machine code or WebAssembly. The project is a work in progress and has not yet reached a 0.1 release, though it offers a compiler CLI, standard library, tutorial, and examples.

## Use cases
- learn a functional programming language
- compile fast native binaries from a friendly language
- build webassembly apps from a functional language
- try a single-paradigm functional language with simple primitives
- contribute to an open-source compiler written in zig

## When to choose
- you want to experiment with a modern functional language that compiles to machine code or wasm
- you value fast build and run times with a friendly toolset
- you want to contribute to an early-stage language project

## When to avoid
- you need a stable, production-ready language for critical projects
- you require a 1.0 release with long-term stability guarantees
- you need broad ecosystem libraries and mature tooling today

## Facets
- artifact type: cli-tool
- maturity: experimental
- function: compiler, programming-language, interpreter, developer-tools
- domain: programming-languages, compilers, developer-tools, cross-platform
- platform: windows, cli, wasm, cross-platform
- tags: functional-language, zig, language-compiler, work-in-progress, wasm-target, linux, macos

## Member repositories
- roc-lang/roc (main) score 80

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:34.228816+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 2026-08-30T07:21:27.529346+00:00, confidence not recorded.
  - readme: https://github.com/roc-lang/roc (fetched 2026-08-28T04:09:34.228816+00:00, sha e6ef5838ed01)
  - homepage: https://roc-lang.org (fetched 2026-08-29T08:45:44.480096+00:00, sha 52571973e45c)
  - site_page: https://roc-lang.org/install (fetched 2026-08-29T08:45:44.485632+00:00, sha e400148a6754)
  - site_page: https://roc-lang.org/docs/main (fetched 2026-08-29T08:45:44.487733+00:00, sha 794ce42d82ed)
- Data as of 2026-08-30T08:39:29.467469+00:00.