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Azure Database for PostgreSQL vs Google Cloud SQL

Azure Database for PostgreSQL: Microsoft's managed community PostgreSQL, with zone-redundant HA, DiskANN vectors and Citus elastic clusters. Google Cloud SQL: Google Cloud's managed MySQL, PostgreSQL and SQL Server, with an Enterprise Plus tier for fast failover.

key differences

  • Horizontal scaling is addon in Azure Database for PostgreSQL and none in Google Cloud SQL.
  • Only Azure Database for PostgreSQL has pub/sub.

choose azure-database-for-postgresql for

  • +Postgres backends for Azure-hosted apps
  • +AI copilots with vectors and relational data together
  • +Migrating Oracle or on-prem Postgres into Azure
  • +Multi-tenant SaaS using Elastic Clusters

best at · OLTP, Vector search, RAG

choose google-cloud-sql for

  • +Standard web and mobile backends on Google Cloud
  • +Migrating on-prem MySQL, Postgres or SQL Server to GCP
  • +Cloud Run and GKE application databases
  • +WordPress and CMS hosting

best at · OLTP, Content, Metadata

Azure Database for PostgreSQLMicrosoft's managed community PostgreSQL, with zone-redundant HA, DiskANN vectors and Citus elastic clusters.
Google Cloud SQLGoogle Cloud's managed MySQL, PostgreSQL and SQL Server, with an Enterprise Plus tier for fast failover.
overview
Primary model
Relational
Relational
Also supports
Document, Spatial, Vector, Graph
Document, Spatial, Vector
Type
Managed service
Managed service
Status
Active
Active
Developer
Microsoft
Google
First release
2017
2011
Latest version
–
–
License
ProprietaryProprietary (Azure service; engine is PostgreSQL License)
ProprietaryProprietary (Google Cloud service)
Free tier
✓
—
popularity
WhichDB Score
4.9
10.9
Rank
#392
#292
GitHub stars
–
–
Stack Overflow questions
214
3.9K
scale & guarantees
Comfortable data size
Medium (≤ 10 TB)
Medium (≤ 10 TB)
Horizontal scaling
Addon
None
Multi-region
Read replicas
Read replicas
ACID
Full
Full
Consistency
Strong
Strong, Eventual
Schema
Strict
Strict
Architecture
Primary replica, Client server, Distributed
Primary replica, Client server
deployment
Self-hosted
—
—
Vendor-managed cloud
✓
✓
Serverless
—
—
Embedded
—
—
Edge
—
—
Clouds
Azure
Google Cloud
capabilities
Transactions
✓
✓
Joins
✓
✓
Secondary indexes
✓
✓
Full-text search
✓
✓
Vector search
✓
✓
Geospatial
✓
✓
JSON
✓
✓
Change data capture
✓
✓
Triggers
✓
✓
Stored procedures
✓
✓
Materialized views
✓
✓
TTL / expiry
—
—
Pub/Sub
✓
—
Columnar storage
—
—
In-memory
—
—
Durable persistence
✓
✓
Compression
—
—
Encryption at rest
✓
✓
Role-based access
✓
✓
Time travel
—
—
Branching
—
—
Online schema changes
—
—
Streaming ingest
—
—
Offline sync
—
—
Runs in WebAssembly
—
—
interfaces
Query languages
SQL, PL/pgSQL
SQL, PL/pgSQL, T-SQL
Client languages
C#, Java, Python, JavaScript, Go, PHP, Ruby, Rust
Java, Python, Go, JavaScript, C#, PHP, Ruby
Best for
OLTP, Vector search, RAG, Geo
OLTP, Content, Metadata, Vector search
Add more to this comparisonNot sure either fits? Try smart match

Azure Database for PostgreSQL vs Google Cloud SQL: FAQ

What is the difference between Azure Database for PostgreSQL and Google Cloud SQL?

Azure Database for PostgreSQL: Microsoft's managed community PostgreSQL, with zone-redundant HA, DiskANN vectors and Citus elastic clusters. Google Cloud SQL: Google Cloud's managed MySQL, PostgreSQL and SQL Server, with an Enterprise Plus tier for fast failover. Horizontal scaling is addon in Azure Database for PostgreSQL and none in Google Cloud SQL. Only Azure Database for PostgreSQL has pub/sub.

When should I choose Azure Database for PostgreSQL over Google Cloud SQL?

Choose Azure Database for PostgreSQL for postgres backends for Azure-hosted apps; AI copilots with vectors and relational data together; and migrating Oracle or on-prem Postgres into Azure. Choose Google Cloud SQL for standard web and mobile backends on Google Cloud; migrating on-prem MySQL, Postgres or SQL Server to GCP; and cloud Run and GKE application databases.

Is Azure Database for PostgreSQL or Google Cloud SQL more popular?

Google Cloud SQL ranks #292 on the WhichDB Score (10.9/100) and Azure Database for PostgreSQL ranks #392 (4.9/100). Popularity is not fit: check the requirements that matter for your project.

Are Azure Database for PostgreSQL and Google Cloud SQL open source?

No. Azure Database for PostgreSQL is proprietary, closed-source software. No. Google Cloud SQL is proprietary, closed-source software.