Statsig

Statsig provides a comprehensive platform for feature management, experimentation, and product analytics that enables teams to ship faster and measure the impact of every release. Used by companies like OpenAI, Brex, Notion, and Ancestry, Statsig processes over 1 trillion events per day and supports 2.5 billion unique monthly experiment subjects with 99.99% infrastructure uptime.

• Feature Flags allow teams to decouple code deployment from feature release with percentage-based rollouts, attribute-based targeting, and automated scheduled rollouts. Every release can be turned into an A/B test with built-in impact analysis.

• Experimentation offers a world-class stats engine supporting both Bayesian and frequentist methods, multi-variate experiments, holdouts, multi-arm bandit experiments, and advanced statistical techniques like CUPED, Bonferroni Correction, and Winsorization.

• Product Analytics provides metric drilldown, funnels, retention analysis, user journeys, and dashboards. Advanced features include formulas, statistical operators, distribution analysis, and behavioral cohorts.

• Session Replay enables teams to watch recordings of user web and mobile sessions, with filtering by attributes, behavior, or experiment groups to understand the "why" behind user actions.

• Warehouse Native deployment runs Statsig directly in your data warehouse (Snowflake, Databricks, BigQuery, Redshift, Athena, Fabric) for improved security, reliability, and data governance.

• 30+ SDKs are available in nearly every language, all open-source and high-performance, making integration straightforward across client and server applications.

To get started, sign up for a free Developer account which includes 2M events per month, unlimited feature flag checks, and 50,000 session replays. Install the SDK using the wizard command, configure your feature flags and experiments in the console, and start measuring the impact of your releases immediately.