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PlanetScale’s foundation


Vitess is a battle-hardened open source technology invented at YouTube for deploying, scaling and managing large clusters of database instances. It now powers some of the largest sites on the Internet.

Vitess is trusted by
Why Vitess

Vitess is the cloud-native, open source technology powering PlanetScale.

Horizontal scale

Transparent horizontal sharding allows for an unlimited number of database shards without adding complexity to your application.

High availability

Vitess’s primary replica configuration allows for seamless failover from a primary to a replica when unexpected events occur.

MySQL compatibility

Migrate your existing MySQL applications with minimal changes while leveraging your MySQL expertise to achieve massive scale.

Online scheme migrations

Integration with `pt-online-schema-change` and `gh-ost` makes it easy to track, control, or cancel schema migrations within a simple interface.

Built-in connection pooling

Multiplex front-end application queries onto a pool of MySQL connections to optimize performance.


Developed at YouTube to run on Borg, the inspiration for Kubernetes, Vitess is ideally suited for running databases in Kubernetes.