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Flagsmith

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Open-source feature flagging and remote configuration platform for safe releases, A/B testing, and granular control. Supports 15+ SDKs and self-hosting.

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Open-source feature flag tool with remote config & A/B testing, deployable via Docker in under a minute.

Core Features

  • Feature flags: safely release and rollback features
  • Remote config: toggle features without redeploying
  • A/B testing: run multivariate tests using segments
  • Segments: target specific users or environments
  • 15+ SDKs: support for TypeScript, .NET, Java, etc.

What It Can't Do

  • For production, use external PostgreSQL and Redis; default SQLite is not recommended. Free version lacks enterprise governance features; self-hosted upgrades require manual migration—backup regularly.

Use Cases

  • Gradual rollouts of new features
  • Remote control for marketing campaigns
  • A/B testing to optimize conversion
  • Beta access for preview features

Detailed Introduction

Flagsmith is an open-source feature flagging and remote configuration tool that helps teams safely roll out features, run A/B tests, and manage releases without deploying new code. It supports 15+ SDKs (TypeScript, .NET, Java, etc.), offers segmentation, organization management, and can be self-hosted or used as SaaS. With a Docker Compose setup, you can start in under a minute. Its BSD-3-Clause license makes it a strong alternative to proprietary solutions like LaunchDarkly.

Tags

feature-flagsremote-configA/B-testingdevopsrelease-management

Getting Started

1

Download installer

Click the button above to download the installer for your system

2

Install the software

Double-click the downloaded installer and follow the prompts

3

Open terminal and run: curl -o docker-compose.yml https://raw.githubusercontent.com/Flagsmith/flagsmith/main/docker-compose.yml

4

Run: docker-compose -f docker-compose.yml up

5

Find the password reset link in logs and visit http://localhost:8000 to set admin password

Install Guide
  1. Open terminal and run: curl -o docker-compose.yml https://raw.githubusercontent.com/Flagsmith/flagsmith/main/docker-compose.yml
  2. Run: docker-compose -f docker-compose.yml up
  3. Find the password reset link in logs and visit http://localhost:8000 to set admin password
File Integrity

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Open Source Transparency

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Environment Guide

Uninstall Info

Stop containers: docker-compose down; optionally remove volumes: docker-compose down -v; delete the downloaded docker-compose.yml file.

No Extra Dependencies

Ready to use after download. No additional runtime required.

Project Info
LicenseBSD-3-Clause
Last Updated2026-05-13 14:17:12
GitHub RepositoryOfficial Website

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