# Unleash/unleash

Open-source feature management platform

Repository: https://github.com/Unleash/unleash
Canonical: https://ross.abutalabs.com/products/unleash
Homepage: https://www.getunleash.io
Language: TypeScript
License: AGPL-3.0
License Family: copyleft
Topics: feature, feature-toggle, unleash, feature-flags, continuous-deployment, continuous-delivery, devops, feature-toggles, feature-toggling, activation-strategies, variants, experiments, toggles, hacktoberfest, devtool, integration, collaboration, sdk, platform-engineering
Last push: 2026-08-26T22:00:00+00:00

## Health v2 (maintenance only)
Score: 98/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 96, longevity 100
- inputs: {"age_days": 4356, "days_push": 7, "days_rel": 28, "gap_med": 8.5, "n_releases_24m": 55}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 13761, forks 887 (observed 2026-08-28T04:11:04.744925+00:00)

## What it is
Unleash is an open-source feature management platform for controlling feature flag rollouts across applications via a server and 25+ client/server SDKs. It supports gradual rollouts, A/B testing, kill switches, approval workflows, and can be self-hosted or used as a hosted SaaS.

## Use cases
- turn features on and off without redeploying
- gradually roll out a new feature to a percentage of users
- add a kill switch for a risky or AI-generated feature
- run A/B tests with flag variants and user targeting
- manage feature flag technical debt and stale flags
- decouple deployments from releases in CI/CD
- self-host a feature flag service with SDKs in any language

## When to choose
- you need a mature, widely adopted open-source feature flag system with many SDKs
- you want self-hosting or data governance with SSO, RBAC, and audit trails
- you need gradual rollouts, canary releases, and instant rollback without redeploys

## When to avoid
- you only need a tiny boolean toggle and don't want to run a server
- you need a permissive license for embedding in a closed-source product (AGPL-3.0)
- you want a fully managed service without considering the enterprise pricing tiers

## Facets
- artifact type: service
- maturity: stable
- function: feature-flags, web-framework, api-framework, sdk, self-hosted
- domain: developer-tools, web-development
- platform: self-hosted, cloud
- tags: feature-management, feature-toggles, continuous-delivery, a-b-testing, canary-release, kill-switch, release-management, agpl, devops, automation, nodejs, docker, web-server

## Member repositories
- Unleash/unleash (main) score 98

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:04.744925+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 2026-08-29T17:13:03.534152+00:00, confidence not recorded.
  - readme: https://github.com/Unleash/unleash (fetched 2026-08-28T04:11:04.744925+00:00, sha 55fe27ec52a9)
  - homepage: https://www.getunleash.io (fetched 2026-08-29T08:07:49.709817+00:00, sha ad9e69ed1549)
  - site_page: https://docs.getunleash.io (fetched 2026-08-29T08:07:49.721725+00:00, sha 915d950d14ab)
  - site_page: https://docs.getunleash.io/ (fetched 2026-08-29T08:07:49.727602+00:00, sha 915d950d14ab)
  - site_page: https://www.getunleash.io/about (fetched 2026-08-29T08:07:49.735567+00:00, sha 756551960fe9)
  - site_page: https://www.getunleash.io/pricing (fetched 2026-08-29T08:07:49.719666+00:00, sha 2a57ccfe6e01)
  - site_page: https://www.getunleash.io/enterprise-feature-management-platform (fetched 2026-08-29T08:07:49.723514+00:00, sha 0e674b7d2ba8)
  - site_page: https://www.getunleash.io/blog/canary-deployment-what-is-it (fetched 2026-08-29T08:07:49.725577+00:00, sha 7aa98a2dbef4)
- Data as of 2026-08-30T08:39:29.467469+00:00.