| PostgreSQL | MongoDB |
|---|---|
| PostgreSQL is a classical, relational database server that supports most SQL standards. MongoDB is a NoSQL database. | |
| PostgreSQL is a traditional relational database management system (RDBMS) or SQL-based databases like Oracle and MySQL. It is open-source and free to use. MongoDB is a no-schema, NoSQL, JSON format database. It also provides a free version, but its enterprise-paid versions are more popular. | |
| PostgreSQL database is written in C language. | MongoDB is written in C++. |
| PostgreSQL is a Relational Database Management System. | MongoDB is a Non-Relational Database Management System. |
| PostgreSQL is an Object-Oriented Database. | MongoDB is Document Oriented Database. |
| PostgreSQL is available in multiple languages. | MongoDB is only available in the English language. |
| PostgreSQL is 4 to 10 times faster than MongoDB on some parameters. | MongoDB is slower than PostgreSQL. It is best suited for big data. |
