What's newJust shipped FlagSync CLI

Ship fast, break nothing

Type-safe feature flags and dead-simple experiments.

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Type Safety

Built for TypeScript

FlagSync's CLI generates TypeScript types from your feature flag config. Get autocompletion, compile-time safety, and confidence your code matches your flags.

Stay in the flow: Instantly sync types from your terminal—no breaking your rhythm.
Never mistype a flag: Eliminate invalid or outdated flag keys with generated TypeScript types.
Code with confidence: Enjoy full autocompletion and static safety. No memorizing flags or checking dashboards.

$ npx flagsync generate

✓ Select your SDK: React
i Found 4 flags
✓ Generated flag types, saved to "gen\flags.d.ts"

function MyComponent() {
const { value, isReady } = useFlag('');

if (!isReady) {
return <div>Loading...</div>
}

return (
<div>Discount is { value }</div>
)
}

Flags Served: 0.0M+
Flag Impressions: 0K+
SDKs: 0
P99 Latency: 0ms

Type Safety

AI-Powered Experiments

Generate ideas, optimize features, and make data-driven decisions with FlagSync Experiments.

A/B/n testing, simplified: Continuously refine your product with ongoing experiments. Stay ahead of user needs and market shifts.
Smart Test Suggestions: Our AI analyzes your site to recommend experiments tailored to your app.
Optimize User Experience: Test different flows or designs to find what users love.

Join Now

Updating the "Register" button could lead to an increase in user registrations.

Name	Traffic %	Conversions	Impressions	Conversion Rate
Register	33%	30	189	15.87% Baseline
Sign Up	33%	44	184	23.91%
Join Now	34%	50	171	29.24%

Traffic distribution as defined in the rollout for flag

Type Safety

What Makes FlagSync Different

Enterprise tools charge thousands for features you’ll never touch, FlagSync provides the essentials for modern development at a fraction of the cost.

Actionable analytics, out of the box: Track live events, flag impressions, and experiment results with clean, readable dashboards—no data science degree required.
Confidence through TypeScript: FlagSync's CLI generates TypeScript types from your feature flag config. Get autocompletion and compile-time safety.
Smarter rollouts, fewer fires: Target user segments or release gradually by percentage to catch bugs before they hit everyone.

Whether you’re an indie hacker, or a mid-sized business, FlagSync offers everything you need without the overwhelming complexity or cost of enterprise tools.

Impressions over time

Evaluations for this feature flag over time.