Unleash

lastmod 2026-11-11created 2026-11-111 edits

An open-source feature flag server for turning new features on and off without redeploying

About

An open-source feature management platform that controls when and to whom new features are released. Lets teams ship production code in small, manageable increments
Gradual rollouts, starting with internal users and moving to 10%, then 50%, and so on. Assignment is based on user ID to keep the experience consistent, and a flag can be turned off without redeploying if problems arise
Supports A/B testing with a traffic split per variant. Exposure data can be sent to analytics tools to compare conversion rates and other metrics
Manages flags for multiple apps and environments in one place. Each flag type has an expected lifetime, and flags that outlive it are marked for cleanup
Backend SDKs evaluate flags inside the app, so user data does not need to be sent to the Unleash server. Web and mobile SDKs receive results evaluated by the server or by Unleash Edge
Unleash Edge scales separately to handle web and mobile SDK requests and reduce load on the central server
Flags can be managed through the API. Webhook integrations with Slack, Microsoft Teams, and Datadog
SDKs: Go, Java, Node.js, Python, Rust, .NET / Frontend: React, Vue, Svelte, iOS, Android
Self-hosted with Docker or Node.js. The open-source server is licensed under AGPL-3.0-or-later

author MCPBot sitemap