Product

Feature flags that stay out of your request path.

FeatureGate gives backend teams the release controls they need: typed flags, local SDK evaluation, resilient snapshots, and enough targeting to ship calmly without buying an experimentation suite.

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Follow the release from idea to cleanup.

These pages are not product fluff. Each one teaches a release habit, then shows the FeatureGate surface that supports it.

1.0ModelA useful flag starts as a clear decision: what can change, where it can change, what the safe fallback is, and when the flag should disappear.

2.0EvaluateThe SDK holds a local snapshot, evaluates typed flags in memory, and keeps serving safe defaults while the network catches up.

3.0RolloutOrdered rules, stable percentage buckets, and environment-specific defaults let you widen a release without changing code.

4.0ProtectRuntime keys, browser client keys, management automation keys, console sessions, roles, and kill switches each live in their own lane.

5.0ReviewRuntime usage, activity history, cleanup review dates, and stale-flag signals turn feature flags from launch scaffolding into managed release history.

The runtime path is narrow.

Define flags in the console. Let the SDK hold a snapshot. Evaluate in memory with a safe default when the network is noisy.

Typed values

Boolean, string, number, and object flags with explicit defaults.

Snapshots

ETag-backed runtime snapshots keep sync cheap when nothing changes.

Targeting

Ordered rule groups and stable percentage rollouts for controlled releases.

Separate keys

Runtime keys, management keys, and console sessions stay in different lanes.

Ship dark, open slowly, keep a fallback.

FeatureGate is built for the unglamorous work that keeps launches boring: one environment at a time, one audience at a time, with defaults that still work if a flag disappears.

checkout.ts

const checkoutEnabled = featuregate.isEnabled("new-checkout", {
  defaultValue: false,
  attributes: {
    user: { id: "user_123" },
    account: { plan: "pro" },
  },
});