# Amazon Aurora on the AWS Free Tier
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Aurora PostgreSQL is also available on the [AWS Free Tier](https://aws.amazon.com/rds/free/) through the [Create with express configuration](CHAP_GettingStartedAurora.AuroraPostgreSQL.ExpressConfig.md). In addition to the express configuration limitations, the following restrictions apply when using Aurora PostgreSQL with the AWS Free Tier:
+ Only clusters created with express configuration are supported (full configuration is not available)
+ Up to 4 Aurora Capacity Units (ACUs) per cluster
+ Up to 1 GB storage per cluster
+ Maximum 2 clusters and 2 instances per account
+ Aurora Global Database and Zero-ETL integrations are not supported