Unleash
The open-source feature flag service.
Overview
Unleash is an open-source feature flag system that gives you full control over your feature rollouts. It is designed with privacy in mind, as the client-side SDKs can run without a connection to the Unleash API, evaluating flags based on a local copy of the configuration. This makes it highly performant and resilient. Unleash supports advanced deployment strategies like canary releases through flexible activation strategies.
✨ Key Features
- Open-source and self-hostable
- Privacy-first architecture (client-side evaluation)
- Feature toggles and activation strategies
- Percentage-based and gradual rollouts
- User segmentation
- Hosted (Pro/Enterprise) and open-source versions
- Audit logging
🎯 Key Differentiators
- Open-source core with a strong focus on privacy and security
- High-performance, resilient client-side evaluation
- Developer-centric design and experience
Unique Value: Provides a fast, private, and resilient way to manage feature flags, with the flexibility of an open-source, self-hostable solution.
🎯 Use Cases (4)
✅ Best For
- Secure, self-hosted feature management
- High-performance feature flagging
💡 Check With Vendor
Verify these considerations match your specific requirements:
- Teams looking for a fully managed, hands-off SaaS solution with extensive built-in experimentation analytics.
- Users who need a full CI/CD pipeline.
🏆 Alternatives
Offers a more private and performant architecture than competitors that rely on server-side API calls for every flag evaluation.
💻 Platforms
✅ Offline Mode Available
🔌 Integrations
🛟 Support Options
- ✓ Email Support
- ✓ Live Chat
- ✓ Dedicated Support (Enterprise tier)
🔒 Compliance & Security
💰 Pricing
✓ 14-day free trial
Free tier: Open-source version is free. Hosted free tier includes 1 environment and 1 project.
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