Compare Cross-DBMS Schema and Sync Data

KS DB Merge Tools for Cross-DBMS is an easy to use diff & merge tool for cross-DBMS scenarios.

Compare schema and data across different DBMS
Merge table data changes in both directions
GUI for Windows; CLI for Windows & Linux
Free version: basic features ^*, no signup, no ads, no telemetry
Standard version: perpetual license, 14-day free trial
Supported DBMS versions:
- MySQL: 5.5 - 9.6
- MariaDB: 10.2 - 12.2
- SQL Server: 2008 - 2025, SQL Azure
- PostgreSQL: 9.3 - 18.*
- Oracle: 11g - 26ai
- SQLite and Microsoft Access files without password protection
Why KS DB Merge Tools

* We are currently working on an update to the Free License. It will include almost all the same features as the Standard License. The main limitation will be a 40-minute session duration limit. Since the current limited free version is being discontinued, we do not recommend starting with it. Instead, we suggest using the Trial version to fully explore the product. By the time it expires, the new fully-featured free version should be available (ETA by 2026-04-17), and you will be able to switch to it once your trial ends.

Only cross-DBMS comparison supported, to compare same DBMS, or MySQL vs MariaDB, please consider KS DB Merge Tools for corresponding DBMS

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Screenshots and Use Cases

Scroll the gallery and click on the image title to open the use case with detailed steps.
Use the toggle to switch application modes, if applicable.
Or explore the app's key features by watching our short video walkthrough (about 3 minutes).

KS DB Merge Tools for Cross-DBMS - Schema changes summary (thumbnail)

KS DB Merge Tools for Cross-DBMS - Data changes summary (thumbnail)

KS DB Merge Tools for Cross-DBMS - Compare and synchronize data (thumbnail)

Merge Tools for Cross-DBMS - Compare custom query result (thumbnail)

KS DB Merge Tools for Cross-DBMS - Compare table definition (thumbnail)

KS DB Merge Tools for Cross-DBMS - Automation and Scripting (thumbnail)

KS DB Merge Tools for Cross-DBMS - Compare object list (thumbnail)

Schema changes summary

Data changes summary

KS DB Merge Tools for Cross-DBMS - Compare and synchronize data

KS DB Merge Tools for Cross-DBMS Free - Compare and synchronize data

Compare table data

Compare custom query result

KS DB Merge Tools for Cross-DBMS - Compare table definition

KS DB Merge Tools for Cross-DBMS Free - Compare table definition

Compare table schema

Automation and Scripting

KS DB Merge Tools for Cross-DBMS - Compare object list

KS DB Merge Tools for Cross-DBMS Free - Compare object list

Compare list of objects

Free vs Standard

	Free	Standard, perpetual license
Price (USD, excluding VAT):	$0	Single-user personal license:	$95 BUY NOW
		Multi-user license for companies and organizations:	Starting at $120 per user, volume discounts: 5 users: $450 ($90 per user) 10 users: $850 ($85 per user) 20 users: $1500 ($75 per user) BUY NOW
		Payments are handled externally by PayPro Global (Toronto, Canada), transactions are encrypted and secure Includes a one year of free upgrades More about purchasing, license types and discounts
Compare schema and programming objects:	Tables definitions (column names and generic types) Views	Tables definitions (column names, generic types, native types and nullability) Table indexes (columns, uniqueness, name) Foreign keys / relations (columns, cascade actions, constraint name) Views Other objects can be compared by querying system metadata
Compare data:	Per table ^{with limitations}	Per table Per view Any table/view vs any other table/view ^{merge only if target updateable} Any custom query result ^{diff only} Batch data diff across multiple tables, views, custom mappings and custom queries Data slices (customized subset of Batch data diff)
Other Standard features:	N/A	Diff profiles Id-Remap Merge SSH support for MySQL and PostgreSQL Export to Xlsx and Json Application customization Misc. other enhancements: scrollbars colored with changes summary, navigation thru changes, etc. More about Standard features
Command line:	For Linux ^{with limitations}	For Linux and WSL For Windows Script Editor GUI

Free	Standard, perpetual license
Price (USD, excluding VAT):
$0	Single-user personal license: $95 BUY NOW Multi-user license for companies and organizations: Starting at $120 down to $75 per user BUY NOW More about purchasing and license types
Compare schema and programming objects:
Tables definitions (column names and generic types) Views	Tables definitions (column names, generic types, native types and nullability) Table indexes (columns, uniqueness, name) Foreign keys / relations (columns, cascade actions, constraint name) Views Other objects can be compared by querying system metadata
Compare data:
Per table ^{with limitations}	Per table Per view Any table/view vs any other table/view ^{merge only if target updateable} Any custom query result ^{diff only} Batch data diff across multiple tables, views, custom mappings and custom queries Data slices (customized subset of Batch data diff)
Other Standard features:
N/A	Diff profiles Id-Remap Merge SSH support for MySQL and PostgreSQL Export to Xlsx and Json Application customization Misc. other enhancements: scrollbars colored with changes summary, navigation thru changes, etc. More about Standard features
Command line:
For Linux ^{with limitations}	For Linux and WSL For Windows Script Editor GUI

If you have any questions, please contact us.