Statsig

Statsig supports thousands of experiments impacting over a billion end users globally. The modern platform combines feature flags, A/B testing, and analytics with enterprise-grade statistical analysis. Feature management enables gradual rollouts (5% to 100%), feature targeting by region/device/user profile, and instant rollback. Experimentation supports sequential and switchback tests to multi-armed bandits and CMABs for hundreds of concurrent experiments. Statsig's stats engine features built-in variance reduction and advanced statistical techniques vetted by thousands of data scientists. Companies like OpenAI, Notion, Brex, and Eventbrite use Statsig for feature rollouts, experiment automation, and performance-driven decision making.