Hypertune
Type-safe feature flags platform with A/B testing, analytics, and app configuration optimized for TypeScript
Open-Source Projects
Discover top open-source software, updated regularly with real-world adoption signals.
Discover top open-source software, updated regularly with real-world adoption signals.
Open-Source Feature Flagging and Remote Config Platform
Ship faster with feature flags, remote config, and A/B testing. Self-host or use the hosted SaaS. Control releases with granular segmentation across web, mobile, and server applications.
Flagsmith is a feature flagging and remote configuration platform designed for teams that need granular control over software releases. Wrap any section of code with a flag and toggle features on or off across different environments, users, or segments—without redeploying.
The platform supports A/B testing, multivariate experiments, and user segmentation to help teams release features to beta testers, collect feedback, and iterate rapidly. With 15+ SDKs covering languages like TypeScript, .NET, Java, Python, and frameworks including React and Next.js, Flagsmith integrates into existing workflows seamlessly.
Flagsmith offers both self-hosted and SaaS deployment models. The open-source core (BSD-3-Clause license) includes the REST API and frontend dashboard, enabling teams to run the platform on-premise or in private cloud environments. Enterprise governance and management features are available under a commercial license. Organization management capabilities support multi-project structures with role-based access control, making it suitable for teams of any size.
When teams consider Flagsmith, these hosted platforms usually appear on the same shortlist.
Looking for a hosted option? These are the services engineering teams benchmark against before choosing open source.
Progressive Feature Rollout
Release new features to 10% of users, monitor performance, and gradually expand to 100% without redeployment
Beta Testing Program
Create user segments for beta testers, enable experimental features, and collect feedback before general availability
A/B Testing UI Changes
Run multivariate tests on checkout flows, measure conversion rates, and optimize user experience based on data
Environment-Specific Configuration
Manage remote config values across dev, staging, and production without hardcoding or redeploying applications
Yes. Flagsmith provides a Docker Compose setup that bootstraps the API and frontend in under a minute. The open-source core supports on-premise and private cloud deployments.
The open-source version includes core feature flagging, remote config, segmentation, and A/B testing. Enterprise adds advanced governance, compliance, and management features under a commercial license.
Flagsmith offers 15+ SDKs including TypeScript, .NET, Java, Python, and integrations with React, Next.js, and other popular frameworks for web, mobile, and server-side applications.
Run the Docker Compose command from the README to launch locally, or sign up for the hosted SaaS at flagsmith.com. The setup creates an admin user and project automatically.
The majority of the platform is licensed under BSD-3-Clause, with some repositories under MIT. Enterprise features require a separate commercial license.
Project at a glance
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