MongoDB vs PostgreSQL: Rating, Votes and Features
- Pricing: MongoDB — Free, with paid plans; PostgreSQL — Free.
- License: MongoDB — SSPL-1.0; PostgreSQL — PostgreSQL License.
- Data model: MongoDB — Document, Search, Vector; PostgreSQL — Document, Relational.
MongoDB — November 2026: 3 votes, rating 8.8/10.
PostgreSQL — November 2026: 5 votes, rating 9.7/10.
| MongoDB | PostgreSQL | |
|---|---|---|
| Category | database engine | database engine |
| Developer | MongoDB, Inc. | PostgreSQL Global Development Group |
| Created by | Dwight Merriman, Eliot Horowitz, Kevin Ryan | Michael Stonebraker |
| First release | 2009 | 1996 |
| License | SSPL-1.0 | PostgreSQL License |
| Open source | No | Yes |
| Pricing | Free, with paid plans | Free |
| Website | https://www.mongodb.com | https://www.postgresql.org |
| Written in | C++ | C |
| Data model | Document, Search, Vector | Document, Relational |
| Storage layout | Document | Row-oriented |
| Workload | Transactions (OLTP) | Transactions (OLTP) |
| Analytics architecture | Not an analytics platform | Not an analytics platform |
| Query language | MQL | SQL |
| ACID transactions | Yes | Yes |
| Schema | Flexible | Strict |
| Deployment | Distributed cluster, Managed cloud, Server | Managed cloud, Server |
| Scaling | Sharding | Replication |
| Create, read, update, delete | Create: fast (Fast document inserts); Read: fast (Whole documents in one read); Update: fast (Atomic in-place field updates); Delete: fast (Cheap single and bulk deletes) | Create: fast (Fast single and bulk inserts, COPY for loads); Read: fast (Rich indexes and a mature planner); Update: moderate (MVCC writes a new row version, vacuum cleans up); Delete: moderate (Rows are marked dead until vacuum reclaims them) |