Statsig

Statsig is a Seattle-based feature management and experimentation platform combining feature flags, A/B testing, product analytics, and session replay in a unified system. The platform provides statistical rigor with sequential testing, CUPED variance reduction, and automated experiment readouts, and includes a generous free tier for startups. Statsig powers experimentation at major tech companies, fintech, and gaming brands, and integrates deeply with data warehouses like Snowflake and BigQuery for warehouse-native experimentation. The platform is built by former Facebook experimentation leaders and is known for combining engineering-grade feature flagging with sophisticated analytics and experimentation in one system.