Side by side

Altova DiffDog vs SQL DXP

Both stand on database schema comparison tools. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

Altova DiffDog

Free trial Windows

DiffDog covers file and directory comparisons as well as database work, with Enterprise Edition adding three-way merges and expanded database comparisons. Check the Word requirement and the edition-specific features before choosing between the two one-time plans.

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SQL DXP

Free trial Windows

SQL DXP covers cross-engine schema and data comparisons, with mapping, scripts, reports, snapshots, and command-line execution. Account for conversion limits when comparing different database types, and use the trial to evaluate the workflow.

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The facts

	Altova DiffDog	SQL DXP
Free plan	A free trial	A free trial
Open source	Not published	Not published
Runs on	Windows	Windows
Lowest paid plan	DiffDog 2026 Professional Edition: $189, paid once	Not published
Plans published	2	None
Maker	Not published	Not published
Website	altova.com	sqldelta.com
On database schema comparison tools	#18 of 25	#22 of 25

Altova DiffDog: what it does well

Compares files, folders, and database data
Supports bidirectional merging and direct file editing
Enterprise Edition adds three-way comparison
Exports difference reports in three formats
Offers a 30-day trial

What to know first

Available on Windows
Word comparison requires Microsoft Word 2003 or later
No free plan

SQL DXP: what it does well

Compares SQL Server, Oracle, and MySQL.
Generates and edits synchronization scripts.
Creates HTML reports and XML snapshots.
Supports command-line project execution.
Includes a 14-day evaluation.

What to know first

Available on Windows only.
Some cross-platform objects and properties cannot be converted.
Command-line documentation allows plain-text passwords.

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