PocketBase

PocketBase is an open-source backend, consisting of an embedded database (SQLite), authentication, file storage, and a real-time subscription engine, all in a single portable file. It is incredibly fast and easy to deploy, making it perfect for small business side projects, internal tools, or simple applications. Because it is a single executable, it is very easy to manage and backup. It is a fantastic choice for developers who want a 'batteries-included' backend that is lightweight and doesn't require a complex server setup.