Oso presents itself as a robust solution for teams needing to transition from WorkOS FGA, which will be discontinued in November 2025, by offering a streamlined migration process that minimizes disruptions and enhances authorization capabilities. With the ability to integrate existing databases and use advanced migration tools like Oso Migrate, Oso facilitates a smooth transition by allowing for centralized control only where necessary and provides a flexible, expressive querying system based on Facts. The platform is backed by prominent investors and trusted by leading companies, ensuring a reliable long-term partnership. Oso's core engine, informed by experts and built to support complex authorization requirements such as custom roles, enables efficient logic writing and querying, which is especially beneficial for startups scaling up. The guide emphasizes building confidence through parity checks during the migration process to ensure consistency and reliability, ultimately providing a clear and efficient path forward for replacing WorkOS FGA.