PostgreSQL 16 is better suited for applications requiring strong ACID compliance, complex relational data models, and advanced SQL querying. MongoDB 8.0 is a better choice for applications that need flexible schemas, horizontal scalability, and faster read/write operations on document-oriented data.
| Attribute | PostgreSQL 16 | MongoDB 8.0 |
|---|---|---|
| Data Model | Relational. Also supports some NoSQL features via JSON. | Document-oriented, using BSON (binary JSON) format. Flexible schema. |
| ACID Compliance | Fully ACID compliant. | ACID properties for single-document operations. Multi-document transactions with ACID guarantees using replica sets or sharded clusters. |
| Scalability | Vertical: Supports performance tuning and optimization. Horizontal: Achieved through read replicas, data sharding, or logical replication. | Horizontal scaling. Improved horizontal scaling for faster and more cost-effective data distribution across shards. Scales to handle millions of users. |
| Query Language | SQL | NoSQL. MongoDB Query API. |
| Transaction Support | Strong transaction support | Supports multi-document ACID transactions with replica sets and sharded clusters. |
| Indexing Capabilities | Supports various index types, including B-tree, Hash, GIN, GiST, SP-GiST, and BRIN. Offers covering indexes and parallel index scans. | Single-field, compound, multikey, text, geospatial, and wildcard indexes. Improved indexing for faster read and write operations. |
| Replication Methods | Asynchronous replication. Logical replication with performance improvements. | Replica sets for high availability and data redundancy. |
| Sharding Support | Supports sharding. | Robust sharding capabilities for horizontal scaling. Enhancements for faster resharding and moving collections between shards. |
| Community Support & Ecosystem | Strong, active open-source community with regular releases, tools, and extensions. | Large and active community. Available on AWS, Google Cloud, and Microsoft Azure through MongoDB Atlas, on MongoDB Enterprise Advanced for on-premises and hybrid deployments, and as a free download with MongoDB Community Edition. |
| Cloud Provider Integration | Available on major cloud providers like AWS, Azure, and GCP. | Tightly integrated with major cloud providers like AWS, Azure, and GCP. |
| Security Features | Authentication: GSSAPI, SSPI, LDAP, SCRAM-SHA-256, Certificate, and more. Transparent data encryption. Improved access control rules. | Authentication: SCRAM (default), X.509 certificate, Kerberos, LDAP, and OpenID Connect. Encryption at rest and in transit. Queryable Encryption. Role-based access control (RBAC). |
| Performance Benchmarks | Improved query parallelism, bulk data loading, and logical replication. Optimized query plans. | Performance gains over previous versions. Faster reads and writes. Improved time series data handling with significantly faster time series aggregations. |
| Price | Not available | Not available |
| Overall Ratings | Not available | Not available |
| Performance Ratings | Not available | MongoDB 8.0 has shown up to 36% faster reads compared to version 7.0. |