Easily diff Microsoft Word documents

Simul Docs is a version control and collaboration tool for Microsoft Word that makes it easy to diff Word documents and see what changed between versions.

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Used in thousands of organisations worldwide

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How to diff documents with Simul

Simul makes it easy to diff Microsoft Word documents. Here's how it works:

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1. Upload the original document

Upload the original document from your computer or from cloud storage services like Sharepoint, OneDrive, Dropbox, Box or Google Drive.

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2. Upload the comparison document

Upload the comparison document to Simul by selecting 'Import New Version' and then selecting the comparison document from your computer or cloud storage provider. This will create a new version of the document in Simul.

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3. Review the differences

Simul will then show you what changed between the original version and the comparison version of the document.

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4. Merge the two documents (optional)

If desired, you can then merge the two documents using Simul's merge functionality each authors changes are marked up as tracked changes in Word, allowing you to easily identify the differences, fix conflicts, and keep moving forward.

What is Simul?

More than just a comparison tool, Simul is a fully-featured version control and collaboration tool for Microsoft Word documents.

By using Simul, you get the following benefits:

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Easily access the latest version

All collaborators can easily find and open the latest version of the document in 1 click.

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Work on documents simultaneously

Multiple people can work on a document at the same time & Simul will automatically create separate ‘branches’ for each version so people aren’t overwriting each others work.

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Easily see what changed

Easily compare different versions of a document - regardless of whether tracked changes were turned on or not - so you always know what changed, who changed it, and when.

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Merge changes in 1 click

Merge versions in 1 click, and each authors changes are marked up as tracked changes in Word, allowing you to easily identify the differences.

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See the full history of changes

Easily go back over a document and see what changed, when it changed and who changed it.

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Easily revert to old versions

Easily revert to a previous version of the document, or take content from a previous version to add to the latest.


“Simul allows anyone on our team to access the latest version of a document instantly. It automatically creates versions, allows us to compare them to see what changed, and gives us a full version history of the document. It’s made writing research reports so much easier.”

Nikolas UCLA Version Control Word

Nikolas Balanis - Cancer Researcher, UCLA

Get Started For Free

It's free to collaborate on 1 document, and paid plans start at just $15 per month.