updated for the june 2026 release
Ship behind a flag.
Feature flags with local evaluation, surgical targeting, and a paper-trail audit log. Search the docs, or start with the quickstart.
new-checkout-v2 on · serving true to 100%
START HERE
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Quickstart
Create your first flag and read it from your code in under five minutes.
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Core concepts
How flags, environments, contexts, and targeting rules fit together.
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SDKs
Drop-in clients for Node.js, browsers, Go, Python, and Ruby. They all evaluate the same way.
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OpenFeature
A provider for the OpenFeature standard, so your code stays portable.
LOOK UP A CONCEPT
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Targeting rules
Decide which user gets which value, by attribute, by segment, or by exact key.
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Percentage rollouts
Roll out to 10%, then 50%, then everyone, with stable per-user bucketing.
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Segments
Reusable groups of users you can target by name from any flag.
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Change requests
Require review before a flag change goes live, with a comment for posterity.
BUILD YOUR RELEASE