As Google Optimize and Optimize 360 reach their sunset on September 30, 2023, users are exploring alternatives for their A/B testing needs, with GrowthBook emerging as a compelling option due to its open-source nature and flexibility. GrowthBook allows users to maintain data ownership, avoiding vendor lock-in, and supports integration with a range of data sources and event trackers, making it versatile for diverse analytics needs. It offers transparency by allowing users to view raw data and SQL queries, and flexibility with options for exporting data in various formats. GrowthBook's statistical engine accommodates both Bayesian and frequentist approaches, providing familiarity and choice for users transitioning from Google Optimize. Notably, GrowthBook extends beyond front-end experimentation to include back-end, mobile, and edge testing, offering comprehensive experimentation capabilities. Its core product is free for self-hosted use, with advanced features available at lower costs compared to proprietary platforms, making it an attractive solution for teams looking to enhance their A/B testing frameworks post-Google Optimize.