Flagsmith – open-source feature flag and remote config service

In plain words

Flagsmith is an open-source service for managing feature flags and remote configuration. It allows developers to control feature rollouts and adjust application settings without redeploying code. The service is designed for software development teams who need to test features gradually, target specific user groups, and manage configuration across environments. Being open-source, it can be self-hosted or used as a managed service.

written from the facts on this page · September 2026

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