PostgreSQL

PostgreSQL is an open-source relational database management system developed by a worldwide community for more than three decades. It stores data in tables queried with SQL and guarantees ACID transactions, so data stays consistent under concurrent use. Beyond the relational core, it handles JSON documents, full-text search, replication and custom data types, and it can be extended with add-ons such as PostGIS for geospatial data. It is free to use and runs on a company's own servers or as a managed service at most cloud providers. Developers use it as the main database of web and business applications, and administrators for analytical and transactional workloads.