# ratpack/ratpack

Lean & powerful HTTP apps

Repository: https://github.com/ratpack/ratpack
Canonical: https://ross.abutalabs.com/products/ratpack
Homepage: https://ratpack.io
Language: Java
License: NOASSERTION
License Family: other
Last push: 2026-07-03T03:51:24+00:00

## Health v2 (maintenance only)
Score: 63/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 90, release rhythm 8, longevity 100
- inputs: {"age_days": 4971, "days_push": 61, "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 1949, forks 402 (observed 2026-08-28T04:05:58.063208+00:00)

## What it is
Ratpack is a set of Java libraries built on the Netty event-driven networking engine for creating lean, high-performance HTTP web applications. Its API is optimized for Java 8 and Groovy, with optional Google Guice integration and Gradle build-time support.

## Use cases
- build high-performance HTTP APIs on the JVM
- create web applications in Java or Groovy
- build event-driven non-blocking web services with Netty
- structure large applications with dependency injection via Guice
- build and test JVM web apps with Gradle integration

## When to choose
- you want a lean toolkit rather than an all-encompassing framework
- you need non-blocking, event-driven HTTP handling on the JVM
- your team works in Java 8 or Groovy
- you want optional, composable Guice integration

## When to avoid
- you need a batteries-included framework with extensive current documentation
- you want a framework with frequent recent releases (2.0 has been in RC since 2022)
- you prefer Kotlin-first or Spring-ecosystem tooling

## Facets
- artifact type: framework
- maturity: maintenance
- function: web-framework, http-server, routing, middleware
- domain: web-development, backend, apis
- platform: jvm, cross-platform
- tags: netty, groovy, reactive, http-apps, guice

## Member repositories
- ratpack/ratpack (main) score 63

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:58.063208+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 2026-08-30T03:06:54.940193+00:00, confidence not recorded.
  - readme: https://github.com/ratpack/ratpack (fetched 2026-08-28T04:05:58.063208+00:00, sha d5510bfe20c9)
  - homepage: https://ratpack.io (fetched 2026-08-29T10:46:44.110330+00:00, sha dfb46a6b8ee8)
  - site_page: https://ratpack.io/manual/current (fetched 2026-08-29T10:46:44.112935+00:00, sha 28dbe4046ba9)
  - site_page: https://ratpack.io/versions (fetched 2026-08-29T10:46:44.114597+00:00, sha 0cfe070515f4)
- Data as of 2026-08-30T08:39:29.467469+00:00.