Service Weaver (serviceweaver.dev) is a programming framework that makes it easy to write, deploy, and manage cloud applications in Go. It allows you to postpone some of the hard decisions about how to split your application into microservices until later, while enabling you to write fewer and better microservices. Service Weaver improves application latency by up to 15x and reduces infrastructure costs by up to 9x compared to state-of-the-art approaches. Finally, it allows you to deploy the same application binary locally and across multiple cloud environments.