Alternatives to Microsoft SQL Server

Commercial database platform in the Microsoft ecosystem

A commercial database engine integrated with Microsoft tooling, offering strong operational support and enterprise features.

Include proprietary
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MariaDB

Open-source relational database derived from MySQL

databaserdbms
Updated 2/20/2026GPL-2.0
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PostgreSQL

Advanced open-source relational database

databaserdbms
Updated 2/20/2026PostgreSQL License