Relay Docs
Reference

Regions

Providers and regions available for managed databases.

Managed databases are provisioned into a provider and region. Availability is driven by what Relay has deployed; selecting an engine narrows the list to providers and regions that support it.

Currently available:

ProviderRegionEngine
AWSus-east-1PostgreSQL

Run relay db regions to see exactly what's available to you. For private connectivity into this region, see Private networking (AWS today).