RethinkDB is an open-source distributed database that makes it easy for developers to build real-time applications. It is a scalable, fault-tolerant database that simplifies the process of building applications that can handle large amounts of data and traffic. With its powerful query language, RethinkDB enables developers to quickly build powerful applications that can handle real-time data. It supports a wide range of languages and frameworks, making it easy to integrate into existing projects. RethinkDB is an incredibly powerful and reliable tool for developers and is quickly becoming the go-to choice for building real-time applications.