Flagsmith

Flagsmith is an open-source feature flag and remote configuration platform designed to streamline software releases and provide granular control over feature rollouts. It enables development teams to manage feature toggles across web, mobile, and server-side applications, supporting practices like canary deployments and A/B testing. An alternative to Flagsmith is LaunchDarkly, a commercial feature flagging platform with similar capabilities but not open source.

Key features include:

• Feature Flags: Centralized management of feature toggles to control feature visibility.
• Remote Config: Customize feature values without code changes or deployments.
• User Segmentation: Target specific user groups based on traits and behaviors.
• A/B and Multivariate Testing: Conduct experiments with percentage splits across multiple variations.
• SDK Support: Available in multiple languages and frameworks, including React, NextJS, Node, Android/Kotlin, iOS, Flutter, Python, Ruby, .NET, PHP, Go, and Rust.
• Deployment Options: Flexible deployment, including SaaS, private cloud, and on-premises.
• Change Tracking: Logs all changes for auditing and easy rollbacks.

Flagsmith is ideal for development teams, engineering leadership, and software architects looking to accelerate development, reduce risk, and optimize user experiences.