AppHarbor is a cloud-based Platform as a Service (PaaS) provider that specializes in hosting .NET applications. It offers a platform that allows developers to easily deploy and scale their web applications without managing underlying infrastructure. AppHarbor integrates with version control systems like Git, enabling seamless code deployments directly from repositories. It supports various .NET technologies and frameworks, ensuring compatibility and efficiency for .NET developers. With features like automated deployment, instant scalability, and managed services, AppHarbor provides a convenient and reliable solution for .NET developers looking to streamline their development and deployment processes.