This is clearly one of the most popular and oldest open source SQL database management systems. The Oracle developed database is a client/server-side system that consists of a multi-threaded SQL server.
PostgreSQL is an open-source object-relational database system. Some of the key features of PostgreSQL include reliability, robustness, and performance. It also uses and extends the SQL language combined with many features that store and scale the complicated data workloads. PostgreSQL offers a number of features aimed at helping developers build applications.
This is an in-process library that implements a self-contained, serverless, zero-configuration and transactional SQL database engine. SQLite does not have any separate server process.
The general-purpose, document-based distributed database is built for modern application developers. MongoDB is one of the popular databases that include both scalability and flexibility. It can store data in a JSON-like document.
The open-source, in-memory data structure can be used as a database, cache, and message broker. Redis supports multiple data structures including strings, hashes, lists, sets and sorted sets with a range of queries, bitmaps, geospatial indexes. This database is written in ANSI C and works in most POSIX systems.
MariaDB server is one of the most popular database servers. It is developed as open-source software and relational database. MariaDB provides an SQL interface for accessing data.
Google’s Firebase an application development platform for building mobile and web applications. It provides adequate tools to help developers build high-quality apps and grow the user base. Firebase has various functions such as analytics, databases, messaging, and crash reporting.