An open source database is a database application with an open source code base. These databases are free to download, modify and reuse. Open source database software allows developers to build applications based on existing database technology.
This makes these databases cost-effective and allows organizations to take advantage of the latest data management innovations.
This article looks at some of the best open source database software available for your projects in 2023.
ClickHouse is one of the best open source databases. It is used for online analytical processing (OLAP) of queries. Simply put, ClickHouse is designed to analyze large amounts of data.
The database is a weakly transactional database but can process billions of rows of data per second. ClickHouse's processing speed is ideal for analytical workloads such as trend analysis and financial reporting.
feature best free open source database
It is a column-oriented database. ClickHouse supports constant length values to avoid adding additional information.
It comes with tiered storage that allows petabytes of raw data to be stored and processed.
You get data compression. Depending on your workload and hardware capabilities, you can choose between ZSTD and LZ4.
Have fault tolerance. ClickHouse operates on asynchronous multi-master replication, where data is written to each available replica and then distributed to other replicas. Replication is critical to protecting data in the event of a server or hardware crash.
It provides linear scalability by allowing additional servers, which in turn helps expand the cluster.

Microsoft SQL Server is one of the best open source databases. DB is an RDMS created by Microsoft that stores and retrieves data upon request from other applications on a single computer or other devices on a network.

Microsoft released the latest version of DB in 2019 and integrated several versions tailored to specific audiences. Different editions can handle a variety of workloads, from small single-device applications to large applications with concurrent users.
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While Microsoft SQL Server versions may differ, they all revolve around the same functionality. These functions are:
copy
Programmability
development tools
Location and spatial services
Manageability
Management tools

MongoDB is a non-relational database that uses JSON-like documents, unlike other platforms that use rows and tables. DBMS is one of the most advanced and flexible cloud databases with superior data mobility and distribution on Google Cloud, Azure, and AWS.
MongoDB is designed to be ideal for enterprise data warehouses and content management systems because its built-in automation capabilities ensure workload and resource optimization.
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Multi-server replication. MongoDB DBaaS allows for at least three replicas, increasing fault tolerance, data reliability, and availability.
Fragmentation. This functionality is handled by mongos, a dedicated lightweight process, to allow data distribution, making query execution easier. When developing applications with millions of users, sharding is critical to creating a zero-downtime environment.
SCRAM is a security feature used by MongoDB to avoid illegal access.