Feature flags and A/B testing
that don't need a network
call to check.
ExperimentLab evaluates flags locally in your app — no round-trip, no dependency on our uptime. Self-host it on your own infrastructure in minutes.
No credit card required Self-host in minutes
WORKSPACE
Good morning, team.
EXPERIMENT
Onboarding flow v2
Variant B +14.8%94.2% confidence
Flags tell you when to ship.
Experiments tell you what to keep.
Deterministic, client-side evaluation.
Your SDK checks flags instantly, in-process. No latency spike waiting on us, no blank UI while a flag resolves.
Explore feature flagsnew_checkoutProduction
Rollout75%
All usersBeta customersInternal team
Your data, your infrastructure.
Fully open-source and self-hostable. Run it on your own servers if data sovereignty or compliance matters to you — most flagging tools don't give you that option.
Explore experimentsEXPERIMENT RESULT
Pricing page headline
Variant B+18.4%
Statistical confidence97.6%
Built for real production traffic.
Tenant-isolated architecture, queued event ingestion that won't buckle under a spike, and quota-based usage that scales with you instead of surprising you.
Read the SDK guideconst enabled = useFlag("new_checkout");
if (enabled) {
return <NewCheckout />;
}
return <ClassicCheckout />;A community edition
you can run yourself.
$0/month
5 flags, 1 active experiment, 50K events/month. Self-hosted.
- 5 feature flags
- 1 active experiment
- 50K events/month
- Self-hosted
