# Netflix/zuul

Zuul is a gateway service that provides dynamic routing, monitoring, resiliency, security, and more.

Repository: https://github.com/Netflix/zuul
Canonical: https://ross.abutalabs.com/products/zuul
Language: Java
License: Apache-2.0
License Family: permissive
Last push: 2026-08-12T21:05:20+00:00

## Health v2 (maintenance only)
Score: 93/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 97, release rhythm 83, longevity 100
- inputs: {"age_days": 4921, "days_push": 21, "days_rel": 37, "gap_med": 3.0, "n_releases_24m": 85}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 14063, forks 2441 (observed 2026-08-28T04:11:05.421954+00:00)

## What it is
Zuul is Netflix's L7 application gateway service providing dynamic routing, monitoring, resiliency, and security for microservices. It is an asynchronous, non-blocking reverse proxy built in Java, widely used as an edge service in cloud architectures.

## Use cases
- route requests to backend microservices through a single gateway
- add authentication and security filters at the edge of a system
- proxy and load balance HTTP traffic between services
- implement rate limiting and resiliency policies for APIs
- build an edge server for push messaging at scale

## When to choose
- you need a JVM-based, programmable API gateway with custom filters
- you run a Netflix OSS or Spring Cloud microservices stack
- you need dynamic routing and edge-level resiliency in the cloud

## When to avoid
- you want a simple static reverse proxy without custom logic (nginx may suffice)
- your stack is non-JVM and you prefer a lightweight gateway
- you need a fully managed gateway rather than self-operated infrastructure

## Facets
- artifact type: service
- maturity: active
- function: api-gateway, routing, middleware, http-server, rate-limiting, monitoring
- domain: microservices, backend, apis, cloud-computing
- platform: jvm, cloud
- tags: reverse-proxy, edge-service, async-non-blocking, netflix-oss, load-balancing, devops, web-server

## Member repositories
- Netflix/zuul (main) score 93

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:05.421954+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 2026-08-29T17:12:50.445513+00:00, confidence not recorded.
  - readme: https://github.com/Netflix/zuul (fetched 2026-08-28T04:11:05.421954+00:00, sha 320c78310eb9)
- Data as of 2026-08-30T08:39:29.467469+00:00.