PlanetScale is a tech startup that offers a serverless database service that is compatible with MySQL. The company's primary product is designed to provide scalability, performance, and reliability without compromising the developer's experience. It operates in the cloud computing market, specifically in the database management sector, serving clients who need to manage large amounts of data, such as globally distributed applications.

PlanetScale's business model revolves around offering a database service that eliminates the need for developers to implement complex database features. It provides the power of horizontal sharding, a method of splitting a database into smaller parts, and non-blocking schema changes, which allow changes to the database structure without disrupting its operation. This service allows developers to manage their databases more efficiently and without downtime during imports.

The company's product also includes features like built-in connection pooling and edge infrastructure, which help to eliminate MySQL connection limits. It also offers a feature called Data Branches, which provides an isolated copy of a client's database in the cloud, thus eliminating the need for staging environments.

PlanetScale monetizes its services by charging clients for the use of its database management platform. The pricing likely varies depending on the scale and complexity of the client's database needs.

Keywords: Serverless Database, MySQL-Compatible, Scalability, Performance, Reliability, Developer Experience, Horizontal Sharding, Non-Blocking Schema Changes, Cloud Computing, Database Management.