Top Alternatives to PostgreSQL

MySQL Community Edition is the freely downloadable version of the world's most popular open source database.

SQLite is an in-process library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine.

MongoDB is a free and open-source cross-platform document-oriented database program.

MariaDB is a community-developed fork of the MySQL relational database management system intended to remain free under the GNU GPL.

Microsoft SQL Server is a relational database management system developed by Microsoft. As a database server, it is a software product with the primary function of storing and retrieving data as requested by other software applications.

pgAdmin is a popular and feature rich Open Source administration and development platform for PostgreSQL.

Apache CouchDB is open source database software.

ArangoDB is a NoSQL multi-modelPro Hibernate and MongoDB database.

Oracle Database (Oracle RDBMS or simply as Oracle) is an object-relational database management system.

RethinkDB is a free and open-source, NoSQL, distributed document-oriented database.

Couchbase is an open-source multi-model NoSQL document-oriented database software package that is optimized for interactive applications.

Apache Cassandra is a free and open-source distributed NoSQL database management system.

H2 Database Engine is a relational database management system written in Java.

Firebird is a relational database offering many ANSI SQL standard features.