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HeidiSQL vs SQL Server Management Studio: catalog facts
HeidiSQL	SQL Server Management Studio
Free Free and open source under the GPL. Donations are welcomed but nothing is withheld.	Free Free to download from Microsoft.
Windows, Linux	Windows
Exports structure and data directly to another server, not just to a file Native Delphi application; it starts instantly and stays small	Official Microsoft tool for SQL Server and Azure SQL Query editor, scripting and administration in one place
Windows-first; the Linux builds come from a separate Lazarus branch No macOS build	Windows only Focused on Microsoft database platforms
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-2.0	License: Proprietary
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.