# Feature Flags

Open-source feature flag management platform

Unleash is the largest open-source feature flag platform, enabling teams to decouple deployment from release with gradual rollouts, A/B testing, and trunk-based development. It provides 15+ official SDKs for server and client frameworks, a web-based admin dashboard for managing feature toggles, and supports activation strategies like percentage rollout, user targeting, and environment-based rules. Self-hostable via Docker with PostgreSQL storage.

Open-source feature flags and remote configuration

Flagsmith is an open-source feature flag and remote config platform with 15+ SDKs, a clean REST API, and simple Docker deployment. It supports boolean, multivariate, and string flags with segment-based targeting, A/B testing via flag variations, and environment-based workflows. Flagsmith provides a straightforward self-hosted alternative to LaunchDarkly with full API-first design under a BSD-3-Clause license.

Open-source feature flags and A/B testing platform

GrowthBook is an open-source platform for feature flags, A/B testing, and product experimentation. It includes Bayesian and frequentist statistics engines, warehouse-native analytics connecting to BigQuery, Snowflake, and Databricks, and SDKs for 15+ languages. GrowthBook supports targeting rules, gradual rollouts, and an MCP server for AI agent integration. Self-hostable via Docker.