Spin is an open-source framework specifically designed for creating and deploying event-driven serverless applications that utilize WebAssembly (Wasm). The framework leverages the unique properties of Wasm to deliver a highly efficient and secure execution environment. WebAssembly’s sandboxed nature ensures that applications run in isolated, secure environments, minimizing potential security risks. Additionally, Wasm’s portability allows applications built with Spin to be deployed across various platforms without modification, providing flexibility and broad compatibility. One of the standout features of Spin is its impressive performance, particularly regarding cold start times. In traditional serverless architectures, cold starts can lead to noticeable latency as the application initializes. However, with Spin and WebAssembly, cold start times are reduced to milliseconds. This rapid initialization eliminates the necessity for keeping applications in a “warm” state to maintain performance, leading to more efficient resource usage and cost savings. Overall, Spin offers developers a powerful toolset for building robust, scalable serverless applications with the added benefits of security, speed, and cross-platform deployment afforded by WebAssembly.