https://www.altium.com/pl/documentation/altium-365/viewers/standalone-gerber-compare
Standalone Gerber Compare | Altium 365 Documentation
The Standalone Altium 365 Gerber Comparison viewer displays Gerber fabrication files in your web browser. No need for ECAD software installations.
gerber comparealtium 365standalonedocumentation
https://www.intercad.com/index
Share EDA Designs Gerber Viewer, Compare & Translation | interCAD
Experience interCAD, an advanced EDA tool with powerful viewing, review, comparison, conversion, and sharing features. Improve your design workflow and...
gerber viewershareedadesignscompare