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Flagsmith

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Updated: 16 Jan 2026
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Flagsmith is an open source feature flagging and remote config service. Self-host or use our hosted version at https://app.flagsmith.com.

Overview

Flagsmith is an innovative open-source feature flagging tool designed to streamline the software release process. This platform empowers teams to deploy updates and features securely and efficiently, providing granular control over which functionalities are made available to different user segments. With its ability to facilitate feature management, A/B testing, and remote configuration, Flagsmith is perfect for organizations wanting to optimize their release strategies without compromising security.

One of the standout aspects of Flagsmith is its versatility. The platform not only supports a range of programming languages and frameworks, but it also offers various integration options, making it ideal for modern software development environments. By enabling teams to toggle features remotely and gather real-time feedback, Flagsmith helps accelerate the development cycle, ultimately enhancing the user experience.

Features

  • Feature Flags: Release features safely behind a feature flag, allowing you to control which functionalities are accessible by users.
  • Remote Configuration: Easily toggle features on and off without the need for code deployments, facilitating quick adjustments based on user feedback.
  • A/B Testing Capabilities: Run A/B and multivariate tests on new features, leveraging segments to make informed decisions about your software enhancements.
  • Organizational Management: Streamline team collaboration with structured organization management, projects, and role assignments for team members.
  • Multiple SDKs & Frameworks: Supports over 15 popular programming languages, including Typescript, .NET, and Java, making integration with various frameworks smooth and efficient.
  • Community Contributions: Benefit from an active open source community that continually enhances the platform, adhering to a collaborative improvement philosophy.
  • Rapid Setup: Get started in less than a minute with automatic bootstrapping of your admin user, organization, and project.