Ship fearlessly with feature flags
Control your features with confidence. Gradually roll out changes, run experiments, and instantly kill switches when needed. Zero downtime, zero stress.
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Trusted by engineering teams at
Everything you need to ship with confidence
From simple feature toggles to complex multivariate experiments, FeatureFlag gives you complete control over your releases.
Feature Flags
Toggle features on and off instantly without redeploying. Control who sees what with powerful targeting rules.
Gradual Rollouts
Roll out features to a percentage of users and gradually increase. Catch issues before they affect everyone.
A/B Testing
Run experiments and measure impact. Get statistically significant results with our built-in analytics.
User Segments
Target specific user groups based on attributes, behavior, or custom rules. Perfect for beta programs.
Real-time Analytics
Monitor flag evaluations, performance impact, and experiment results in real-time with detailed dashboards.
Kill Switches
Instantly disable problematic features without deploying new code. Your safety net for production issues.
Make data-driven decisions
Run experiments, collect data, and let statistical significance guide your product decisions.
Checkout Flow Experiment
Simple, powerful SDKs
Get started in minutes with SDKs for every language and framework. Type-safe, well-documented, and battle-tested.
import { FeatureFlag } from '@featureflag/sdk';
// Initialize the client
const ff = new FeatureFlag('your-sdk-key');
// Check if feature is enabled
if (ff.isEnabled('new-checkout', user)) {
showNewCheckout();
} else {
showOldCheckout();
}
// Get variation for experiments
const variant = ff.getVariation('pricing-test', user);
renderPricing(variant);Target the right users
Create powerful user segments based on attributes, behavior, or custom rules. Release features to exactly who you want.
Loved by engineering teams
See what developers and product teams are saying about FeatureFlag.
"FeatureFlag completely changed how we ship features. We went from monthly releases to shipping multiple times a day with complete confidence."
"The A/B testing capabilities are incredible. We've increased our conversion rate by 34% by running experiments and making data-driven decisions."
"Kill switches have saved us multiple times. When we spot an issue, we can disable features instantly without any deployment. It's a lifesaver."
Ready to ship fearlessly?
Start your free trial today. No credit card required. Get up and running in under 5 minutes.