# scality/cloudserver

Zenko CloudServer, an open-source Node.js implementation of the Amazon S3 protocol on the front-end and backend storage capabilities to multiple clouds, including Azure and Google.

Repository: https://github.com/scality/cloudserver
Canonical: https://ross.abutalabs.com/products/cloudserver
Homepage: https://www.zenko.io/cloudserver
Language: JavaScript
License: Apache-2.0
License Family: permissive
Topics: aws-s3, docker, multiple-backends, storage, cloud, s3-storage, cloud-storage, cloud-native, object-storage, nodejs, javascript, zenko, artesca
Last push: 2026-08-26T13:34:33+00:00

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 99, release rhythm 87, longevity 100
- inputs: {"age_days": 3745, "days_push": 7, "days_rel": 9, "gap_med": 0.0, "n_releases_24m": 221}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1940, forks 259 (observed 2026-08-28T04:05:57.302257+00:00)

## What it is
Zenko CloudServer is an open-source, Amazon S3-compatible object storage server written in Node.js. It exposes a single S3 API while storing data across multiple backends, including local disk, memory, and cloud providers, and is commonly used to emulate S3 locally for development and testing.

## Use cases
- run a local S3-compatible server for development and testing
- emulate AWS S3 in a CI test environment
- expose a single S3 API over multiple cloud storage backends
- self-host an S3-compatible object storage service
- develop S3-based applications without an AWS account
- abstract storage across on-premise and public clouds

## When to choose
- you need an S3 API endpoint without paying for or depending on AWS
- you want to test S3-integrating code locally or in CI
- you need a multi-cloud storage abstraction behind one S3 interface
- you want a self-hosted, Docker-deployable object store

## When to avoid
- you need production-grade, petabyte-scale storage with vendor support (consider Scality RING or a managed S3)
- you need block or file storage rather than object storage
- you require full parity with every AWS S3 feature
- you want a non-Node.js stack or a lightweight embedded option

## Facets
- artifact type: service
- maturity: active
- function: object-storage, http-server, cloud, self-hosted, developer-tools
- domain: cloud-computing, self-hosted, developer-tools, apis, files
- platform: cross-platform, self-hosted, cloud
- tags: s3-compatible, object-storage-server, multi-cloud, zenko, scality, storage-abstraction, s3-emulator, nodejs, docker

## Member repositories
- scality/cloudserver (main) score 95

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:57.302257+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 2026-08-30T03:08:10.261476+00:00, confidence not recorded.
  - readme: https://github.com/scality/cloudserver (fetched 2026-08-28T04:05:57.302257+00:00, sha 7b9a12634104)
  - homepage: https://www.zenko.io/cloudserver (fetched 2026-08-29T10:47:55.727454+00:00, sha c0c99e9b5ac4)
  - site_page: https://www.zenko.io/docs (fetched 2026-08-29T10:47:55.736796+00:00, sha 0c2cdd6786eb)
- Data as of 2026-08-30T08:39:29.467469+00:00.