Delta Sharing is an open protocol for securing the real-time exchange of large datasets, which enables organisations to share data in real time regardless of which computing platforms they use. It is a simple REST protocol that securely shares access to part of a cloud dataset and leverages modern cloud storage systems, such as S3, ADLS or GCS, to reliably transfer data. With Delta Sharing, a user accessing shared data can directly connect to it through pandas, Tableau, Apache Spark, Rust or other systems that support the open protocol, without having to deploy a specific compute platform first. Data providers can share a dataset once to reach a broad range of consumers, while consumers can begin using the data in minutes.