Flagsmith

Product overview

Flagsmith is an open-source feature flag and remote configuration platform based in London. Development teams use it to toggle features on and off, manage remote configuration values, and run A/B and multivariate tests by serving different flag values to different user segments. The platform handles feature rollouts through percentage-based targeting and user identity management. The company was founded in 2018 and operates as a bootstrapped, profitable business without venture capital funding. Its core codebase is open source under a BSD 3-Clause license (built with Python and Django), with enterprise governance features available under a commercial license. Deployment options include cloud-hosted SaaS, self-hosted, on-premises, and private cloud. Flagsmith integrates with analytics and observability tools including Amplitude, Mixpanel, Datadog, New Relic, Segment, and Heap. SDKs cover over 15 languages and platforms, including TypeScript, Python, Java, Go, Ruby, and .NET. The platform is SOC 2 Type 2 certified. The free tier includes unlimited feature flags, environments, identities, and segments, with up to 50,000 API requests per month. Paid plans start at $45 per month for up to one million requests. KEY FEATURES: - Feature flags with percentage rollouts, user segments, and identity management - Remote configuration for non-code changes - A/B and multivariate testing through flag variants - Open-source core (BSD 3-Clause) with self-hosted option - 15+ integrations with analytics, observability, and CI/CD tools

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