The backup retention times vary based on the service and the selected service plan. For the services that offer specific database restoration support (PostgreSQL and MySQL), the backups cover:
Hobbyist: not available
Startup: 2 days
Business: 14 days
Premium: 30 days
The above backup history length also acts as the usable range for the "Point-in-Time-Recovery" feature of our PostgreSQL service plans.
In case of other services, backups cover only typically only two backups, that are automatically restored when the service is powered up.