Choose Altova MissionKit to experience the full power of Altova’s tools

In addition to DiffDog, the Altova MissionKit download will provide you with the optimal evaluation experience, since it contains the entire line of Altova developer tools.

Download a free, fully- functional, 30-day trial of Altova MissionKit 2025

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Other editions

Download DiffDog

Use this page to download the latest version of DiffDog, which is Version 2025.

For an optimal evaluation experience, download DiffDog Enterprise Edition with the most advanced feature set available.

Select your software version, and click the Download button below to download the self- contained Installer for Altova DiffDog.

Altova DiffDog 2025

Enterprise Edition

provides the most advanced functionality, including comparing/merging Microsoft Word docs, XML Schemas, and databases.

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Start a FREE 30-day trial or activate with your purchased license

Altova DiffDog 2025

Professional Edition

supports diff/merge of text files, folders, and directories. It also includes XML-aware comparison options.

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Previous Releases of DiffDog

If you need to access previous software releases (e.g., to reinstall a previously purchased product after a hardware failure), you can access older versions of DiffDog here:

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Free Trial Evaluation Information

To start your free, 30-day trial, simply download and install the software you wish to evaluate. When you start the software, you will be prompted to request an evaluation license, which you will receive via email. Your personalized evaluation license unlocks the software, and all features are fully enabled for 30 days.

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