ApexSQL Source Control is described as 'SQL Server Management Studio add-in which allows you to version control SQL databases and objects directly from inside SSMS. It integrates with all major source control systems' and is an app. There are seven alternatives to ApexSQL Source Control for a variety of platforms, including Windows, Linux, Mac, SQL Server Management Studio and .NET Framework apps. The best ApexSQL Source Control alternative is dbForge Source Control for SQL Server. It's not free, so if you're looking for a free alternative, you could try gitSQL or VersionSQL. Other great apps like ApexSQL Source Control are Toad for SQL Server, node-db-migrate, Sql Assist and SQL Source Control.