Scaling Data Teams is a practical eBook released by Dagster, designed to help data teams of varying sizes—from solo practitioners to enterprise-scale organizations—navigate the challenges of building and scaling data platforms with clarity and confidence. The book offers a roadmap for growth, addressing specific challenges faced by teams at different stages: from balancing requests and scalable tool selection for solo practitioners, to building credibility through quality testing and collaboration in small teams, ensuring reliability in growing teams, and establishing governance and cross-team collaboration for enterprise teams. It includes real-world case studies from companies like Erewhon, StashAway, Vanta, and Otto, illustrating how these teams successfully scaled their platforms. Emphasizing practical decision-making over chasing trends, the eBook provides mental models, practical examples, and guiding principles to empower teams to deliver current value while preparing for future scalability. The guide is available for free download, and readers are encouraged to engage with Dagster through various channels for feedback, discussions, and potential collaboration.