PostgreSQL vs Azure Cosmos DB for NoSQL

PostgreSQL7.7Visit Azure Cosmos DB for NoSQL6.4Visit

Higher score PostgreSQL #3 in Database Software 7.7/10 Free plan Free plan✓ 0 of 3 features Visit PostgreSQL

vs

Azure Cosmos DB for NoSQL #8 in Database Software 6.4/10 Free plan · 30-day trial Free plan✓ 1 of 3 features Visit Microsoft

• PostgreSQL fits best

  Teams wanting a free, capable relational database

• Azure Cosmos DB for NoSQL fits best

  Apps needing globally distributed JSON storage

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Side by side

Feature	PostgreSQL 7.7/10 Visit ↗	Azure Cosmos DB for NoSQL 6.4/10 Visit ↗
At a glance
Editor score	7.7	6.4
Ranking	#3 in Database Software	#8 in Database Software
Best for	Teams wanting a free, capable relational database	Apps needing globally distributed JSON storage
Pricing model	Free	Free plan + paid
Starting price	Not published	Not published
Free plan	✓	✓
Free trial	—	—
Deployment	Self-hosted	Cloud
Platforms	Windows, macOS, Linux	Web
Support	Community, Docs	Docs
Built for	Solo, Small business, Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features PostgreSQL 0/3 · Azure Cosmos DB for NoSQL 1/3
SQL support	Not published	Not published
Vector search	Not published	✓ (best)
Replication support	Not published	Not published
Specs
Database model	Not published	Not published
Deployment options	Not published	Not published
Included storage	Not published	Not published
Our review
Pros	Combines relational SQL with native JSON and JSONB support. Offers JSONB indexing and JSON-specific operators. Supports replication, standby queries, and multiple backup workflows.	Schema-free JSON storage with SQL-like queries and automatic indexing Supports transactions within a logical partition and vector search Offers provisioned, autoscale, and serverless throughput models
Cons	Requires self-hosted deployment rather than a vendor-managed service. Teams must handle database setup and administration themselves. The supplied deployment options do not include a managed service.	Cloud-only deployment may not suit teams requiring on-premises hosting Transactions are limited to a logical partition Throughput and storage pricing varies by region and usage
Our verdict	PostgreSQL is an open-source object-relational database for storing, querying, and managing structured data. It suits developers, database administrators, and organizations that want to operate a relational database themselves, from solo… Read the review →	Azure Cosmos DB for NoSQL is a fully managed cloud document database for developers building applications around flexible JSON data and global distribution. It pairs SQL-like querying with automatic indexing, transactions within a logical… Read the review →

Strengths and trade-offs

• PostgreSQL — where it wins

  • Combines relational SQL with native JSON and JSONB support.
  • Offers JSONB indexing and JSON-specific operators.
  • Supports replication, standby queries, and multiple backup workflows.

  Where it doesn't

  • Requires self-hosted deployment rather than a vendor-managed service.
  • Teams must handle database setup and administration themselves.
  • The supplied deployment options do not include a managed service.

• Azure Cosmos DB for NoSQL — where it wins

  • Schema-free JSON storage with SQL-like queries and automatic indexing
  • Supports transactions within a logical partition and vector search
  • Offers provisioned, autoscale, and serverless throughput models

  Where it doesn't

  • Cloud-only deployment may not suit teams requiring on-premises hosting
  • Transactions are limited to a logical partition
  • Throughput and storage pricing varies by region and usage

• PostgreSQL7.7/10 · Free plan

  A free, self-hosted relational database with JSONB, replication, and backup options.

  Visit PostgreSQLFull verdict →
• Azure Cosmos DB for NoSQL6.4/10 · Free plan · 30-day trial

  A cloud-only JSON database with flexible throughput and multi-region replication.

  Visit MicrosoftFull verdict →