# Flagsmith

> Open source feature flag and remote config service for managing feature toggles, user segmentation, and A/B testing across web, mobile, and server apps.

- Website: https://www.flagsmith.com/?ref=devshelf.io
- DevShelf page: https://devshelf.io/resource/flagsmith
- Pricing: Freemium
- Tags: Open Source, Self-hosted
- Categories: [Build, DevOps & CI/CD](https://devshelf.io/category/build-devops-cicd.md)
- Last checked: 2026-11-03

## About

Flagsmith is an open source feature flag and remote configuration platform that enables development teams to manage feature toggles, run A/B tests, and perform staged rollouts across web, mobile, and backend applications. It provides SDKs for multiple programming languages and frameworks, allowing developers to control application features in real time without redeploying code. The platform supports user trait storage, granular audience segmentation, multivariate testing, and change auditing.

## Alternatives

- [Unleash](https://devshelf.io/resource/unleash.md): Open-source feature management and feature flag platform for progressive rollouts, experimentation, and runtime control. (pricing: Pay-as-you-go)
- [Statsig](https://devshelf.io/resource/statsig.md): Product development platform combining feature flags, A/B testing, product analytics, and session replay into a single integrated suite. (pricing: Freemium, Pay-as-you-go)
- [GrowthBook](https://devshelf.io/resource/growthbook.md): Warehouse-native experimentation, feature flag management, and product analytics platform for modern engineering and data science teams. (pricing: Freemium)

---

Source: DevShelf.io, the hand-reviewed catalog of dev tools and resources. Every resource is reviewed by hand before it is listed.