Unleash

Roll out features gradually without deploying new code. Unleash lets you turn features on/off, A/B test, and do canary releases - reducing risk and giving you instant control over what users see.

Overview

Features

• 10,000+ GitHub stars - Trusted open source with large, active community
• Battle-tested - 20 million downloads, used in production at scale
• Gradual rollouts - Release to 5%, then 25%, then 100% of users safely
• A/B testing built-in - Test features with specific user segments
• Instant kill switch - Turn off problematic features immediately, no deploy needed
• Target users - Show features to specific segments, beta users, or paying customers
• Works everywhere - SDKs for JavaScript, Python, Java, Go, and 15+ languages
• Environment-aware - Different feature states for dev, staging, and production

Use Cases

• Product teams - Test features with small groups before full launch
• Engineering teams - Deploy code to production but activate features later
• SaaS companies - Show premium features only to paying customers
• Continuous delivery - Ship code daily without risking user-facing changes
• Experimentation - Run A/B tests to find what actually improves metrics
• Risk management - Quickly disable features causing issues without emergency deploys

Quick Deploy

Deploy this template with one click on CloudStation:

https://app.cloud-station.io/template-store/unleash?deploy=true

Configuration

Key environment variables for Unleash: