Microsoft Azure → Amazon Web Services
AWS equivalent of Azure Database for PostgreSQL (flexible server)
The closest AWS equivalents of Azure Database for PostgreSQL (flexible server) are Amazon RDS for PostgreSQL and Amazon Aurora PostgreSQL-Compatible Edition.
About Azure Database for PostgreSQL (flexible server)
| Provider | Microsoft Azure |
|---|---|
| Status | Generally available |
| What it is | Managed community PostgreSQL in Burstable, General Purpose, and Memory Optimized tiers, with same-zone or zone-redundant HA (synchronous warm standby), read replicas, built-in PgBouncer, in-place major version upgrades, stop/start, and extensions such as pgvector. |
| Documentation | learn.microsoft.com |
| Pricing | Official pricing page |
AWS mappings (2)
| Capability | AWS equivalent | Match |
|---|---|---|
| Managed PostgreSQL | Amazon RDS for PostgreSQL | Direct match |
| Cloud-native PostgreSQL (separate compute and storage) | Amazon Aurora PostgreSQL-Compatible Edition | Partial match |
Managed relational engines(1)
Managed PostgreSQL Direct match
Amazon RDS for PostgreSQL maps to Azure Database for PostgreSQL (flexible server). Both run community PostgreSQL with automated backups, point-in-time restore, standby-based HA, read replicas, and a large set of extensions.
- Compute tiers. RDS uses DB instance classes (burstable t, general m, memory-optimized r and x). Azure has Burstable, General Purpose, and Memory Optimized tiers, and you can stop a server to save compute cost on both clouds.
- HA. RDS Multi-AZ uses a standby instance, or a Multi-AZ DB cluster with two readable standbys. Azure zone-redundant HA keeps a synchronous warm standby in another zone; the standby isn't readable.
- Connection pooling. Azure has PgBouncer built into the server (General Purpose and Memory Optimized). On AWS you use RDS Proxy, a separate paid service.
Cloud-native, serverless & distributed SQL(1)
Cloud-native PostgreSQL (separate compute and storage) Partial match
Microsoft maps Amazon Aurora PostgreSQL to Azure HorizonDB, a PostgreSQL service with disaggregated compute and storage. HorizonDB was in public preview when verified, so for production today the usual Azure target is Azure Database for PostgreSQL (flexible server).
- Maturity. Aurora PostgreSQL has been generally available for years and includes Global Database, Serverless v2, Limitless Database, Babelfish, and zero-ETL. HorizonDB is in preview, and Microsoft advises confirming its status before planning a production migration.
- Architecture. Both separate stateless compute from a distributed, zone-resilient storage layer and add read replicas that share storage. HorizonDB uses a database-as-a-log design with separate WAL and data storage fleets.
- Flexible server is a classic single-node-plus-standby design. It's mature, but it isn't a shared-storage cluster.