An open standard for feature flag management that provides a vendor-agnostic API for evaluating feature flags.

Feature Management

What is OpenFeature?

OpenFeature is a CNCF (Cloud Native Computing Foundation) project that defines a standard API for feature flag evaluation. It provides a vendor-neutral interface so that your application code doesn't depend on a specific feature flag provider.

With OpenFeature, you write flag evaluation code once using the standard API, and swap providers (like Kitbase, LaunchDarkly, or Flagsmith) by changing a configuration — no code changes needed. This prevents vendor lock-in and makes migration between providers straightforward.

The OpenFeature SDK is available for multiple languages and includes concepts like providers (the backend that evaluates flags), hooks (middleware for logging, metrics, validation), and evaluation context (the user/request data used for targeting).

Example

Your team adopts OpenFeature and implements the Kitbase provider. Your code calls client.getBooleanValue('new-checkout', false) — if you ever switch flag providers, you only change the provider configuration, not your feature flag code.

Related Terms

Feature Flag

A toggle that enables or disables a feature in your application without deploying new code.

Feature Toggle

Another name for a feature flag — a mechanism to turn features on or off without code changes.

User Targeting

The ability to enable or disable features for specific users based on their attributes or segments.

Ship features with confidence

Use feature flags to control rollouts, run A/B tests, and instantly kill problematic features.

Explore Feature Flags