Citus

Citus is worry-free Postgres for SaaS. Made to scale out, Citus is an extension to Postgres that distributes queries across any number of servers. Whether you have a multi-tenant app that needs scale, or you need to deliver real-time analytics to customers, with Citus you can focus on your app—not your database. At Citus Data, we make it simple to shard Postgres. Citus is available as open source, as on-prem software, and as a fully-managed database service on AWS.