What is Flagsmith used for?

Flagsmith is an open-source feature flag and remote config platform with segments, A/B testing and SDKs, deployable self-hosted, in a private cloud or as a managed cloud service. It is a good fit for gradual rollouts to beta users, changing app behavior without redeploying and running A/B tests on new features.

Is Flagsmith open source?

Yes. Flagsmith is open source under the BSD-3-Clause licence. Its source code is on GitHub at Flagsmith/flagsmith and is written mainly in Python.

Yes. Flagsmith is open source, so the software itself is free to use. A managed cloud version is also available, with paid plans from $45 per month.

Can I self-host Flagsmith?

Yes. Flagsmith can be self-hosted on your own server or infrastructure.

What is Flagsmith an alternative to?

Flagsmith is an open-source alternative to Split, Statsig, ConfigCat and DevCycle. Other open-source alternatives to Split include FeatBit, GrowthBook and Unleash.

Is Flagsmith actively maintained?

Yes. The most recent commit to Flagsmith was on 2 October 2026, and the latest release is v2.279.0, published on 1 October 2026. The project has 6.6k stars on GitHub.

Flagsmith: open-source alternative to Split, Statsig

About Flagsmith

Flagsmith is a feature management platform, released as open source, offering feature flags, remote configuration and experimentation. It provides three deployment options: self-hosted, available as a free open-source build or as a fully supported Enterprise edition, a private cloud and a standard cloud service. Its partnership with OpenFeature is intended to avoid vendor lock-in.

Teams wrap sections of code in flags and toggle features on or off remotely for different environments, users or segments without deploying new code. Segments let you release to beta testers and gather feedback, and A/B and multivariate tests run on top of segments. Organisation management covers orgs, projects and roles for team members, and SDKs cover more than 15 languages with support for frameworks such as React and Next.js, plus integrations and an MCP server.

Flagsmith is written in Python and React, ships as Docker images and is released under the BSD 3-Clause licence for the open-source build. It suits product and engineering teams that want controlled rollouts and remote configuration across web, mobile and server-side applications.

Key features

Feature flags with remote toggling
Remote configuration values
Segments for targeted releases
A/B and multivariate testing
Organisations, projects and roles
SDKs for 15+ languages
Integrations and MCP server

Good fit for

→Gradual rollouts to beta users
→Changing app behavior without redeploying
→Running A/B tests on new features

Built with: Python; React; Docker
Tags: feature-flags; remote-config; ab-testing; feature-management; self-hosted; openfeature; segments; devops; python

Flagsmith: questions and answers

What is Flagsmith used for?: Flagsmith is an open-source feature flag and remote config platform with segments, A/B testing and SDKs, deployable self-hosted, in a private cloud or as a managed cloud service. It is a good fit for gradual rollouts to beta users, changing app behavior without redeploying and running A/B tests on new features.
Is Flagsmith open source?: Yes. Flagsmith is open source under the BSD-3-Clause licence. Its source code is on GitHub at Flagsmith/flagsmith and is written mainly in Python.
Is Flagsmith free?: Yes. Flagsmith is open source, so the software itself is free to use. A managed cloud version is also available, with paid plans from $45 per month.
Can I self-host Flagsmith?: Yes. Flagsmith can be self-hosted on your own server or infrastructure.
What is Flagsmith an alternative to?: Flagsmith is an open-source alternative to Split, Statsig, ConfigCat and DevCycle. Other open-source alternatives to Split include FeatBit, GrowthBook and Unleash.
Is Flagsmith actively maintained?: Yes. The most recent commit to Flagsmith was on 2 October 2026, and the latest release is v2.279.0, published on 1 October 2026. The project has 6.6k stars on GitHub.