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Roc-lang
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Roc-lang

roc-lang.org·Infrastructure

Roc is a functional programming language designed to emphasize speed and user-friendliness. It is built around a small set of simple language primitives and adheres to a single-paradigm, functional approach. The language aims to make both writing and running code fast, with a focus on an accessible syntax, semantics, and integrated toolset that prioritize ease of use.

Roc compiles to both machine code and WebAssembly, allowing for flexibility in deployment and enabling performance across different environments. The language can be tried directly in the browser without the need for a backend server, which lowers the barrier to entry for experimentation and learning. Tutorials and examples are provided to help users get started, and the language is currently suited for tasks such as programming puzzles, as noted in the documentation about the new compiler's state.

The project is supported by corporate sponsors, including Lambda Class, ohne-makler, and Martian. The Roc website offers resources such as installation guides, community links, documentation, and examples to assist users in learning and using the language.

evidence_sufficient: false

Open SourceUPL-1.0
WebCLI
R
Roc-lang preview
Visit roc-lang.org↗
⭐5.8k
stars
🍴396
forks
✓7
features
📅2019
since

Overview

7 features

In the Frameworks & SDKs space, Roc-lang takes a focused approach. It provides a fast, user-friendly functional programming language for building efficient applications. It is built as an open-source project for developers seeking a functional programming language. Roc-lang is open source under the UPL-1.0 license. Roc-lang is available on the web and the command line.

Behind Roc-lang is Roc open source maintainers, and the product first shipped in 2019. Development happens publicly on GitHub with 5.8k stars and 4.6k commits in the last 90 days. Key capabilities include functional programming, fast compilation, and machine code output.

  • ✓Functional programming
  • ✓Fast compilation
  • ✓Machine code output
  • ✓WebAssembly support
  • ✓Beginner-friendly syntax
  • ✓Command-line compiler
  • ✓Cross-platform

Tags

functional-languagewasm-supportroc-compiler

Built with & integrations

Hosting
cloudflare
Runs on
BrowserCLI

Trust & compliance

LicenseUPL-1.0
Verified signals
✓ HTTPS✓ Open Source✓ Free tier✓ GitHub · ★ 5.8k✓ Active maintenance

Recent events

Latest indexed changes and source events

  1. IndexedJul 16, 1:43 AM

    roc-lang/roc verified by the PulseGate indexer

    Source: PulseGate indexerOpen ↗

Frequently asked questions about Roc-lang

What does Roc-lang do?
Roc-lang provides a fast, user-friendly functional programming language for building efficient applications. It is catalogued under Frameworks & SDKs on PulseGate.
Who is Roc-lang for?
Roc-lang is an open-source project built for developers seeking a functional programming language.
Is Roc-lang free?
Yes — Roc-lang is open source under the UPL-1.0 license and free to use.
What platforms does Roc-lang run on?
Roc-lang runs on the web and the command line.
Is Roc-lang still maintained?
PulseGate's liveness checks currently classify Roc-lang as active. The GitHub repository shows 4.6k commits in the last 90 days.
What are alternatives to Roc-lang?
Similar tools tracked by PulseGate include ROX Playground, RocSlope2, and roctop.ROX PlaygroundRocSlope2roctop
Who makes Roc-lang?
Roc-lang is developed by Roc open source maintainers.
When did Roc-lang launch?
Roc-lang first shipped in 2019.

At a glance

Platforms
Web
Languages
English
Open source
Yes · ★ 5.8k
License
UPL-1.0
First seen
Jul 16, 2026
Activity
🟢 Active
Status
🟢 Active
Built for
Developers seeking a functional programming language
Model
Open source
Solves
Provides a fast, user-friendly functional programming language for building efficient applications.

Developer

Roc open source maintainers
Community-driven
↗ GitHub

Open source

View on GitHub →
⭐ Stars
5,781
🍴 Forks
396
Open issues
173
Last commit
6d ago
Commits 90d
4615
Contributors
321
Authorship
Community-driven
Default branch
main
Latest release
alpha4-rolling · 11mo ago

Live coverage

Confidence
Medium · 73
Indexed
Jul 16, 2026
Lifecycle
Alive
Activity
Active
First seen
Jul 2026
Last seen
6d ago
Identity audit (9)
Entity ID
cmrmui0or042f3pe2n4gpqs83
Slug
roc-lang-roc-roc-lang-org
Verification state
Indexed for public listing
Claim / listing state
Unclaimed · listed: yes
Index status
Included in index
Latest evidence snapshot
Jul 16, 2026
Timeline basis
Indexed-at chronology (no inferred launch/funding milestones).
Last updated
Jul 16, 2026
Canonical URL
https://roc-lang.org/

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Other apps tracked under the same category.

  • ROX Playground
    roxlang.com
  • RocSlope2
    rocscience.com
  • roctop
    pypi.org
  • Bock
    bocklang.org
  • Rue
    rue-lang.dev
  • rocannon
    pypi.org