Find Excel spreadsheet errors with Rainbow Analyst spreadsheet audit software

Spreadsheet error chart

Try the Rainbow test

Many research studies (both academic and commercial) have shown that all spreadsheets contain errors. The screenshot above right shows how Rainbow Analyst Pro highlights some potential errors, and the fact is that without Excel audit software such as Rainbow Analyst, many spreadsheet errors are likely to go undetected. If you’re not convinced, you can try the Rainbow test for yourself:

It took Rainbow Pro just 4 seconds to highlight this spreadsheet, and we’re willing to bet that it saved you a lot more time than that in finding the error (which you can see very clearly in this unedited screenshot). And this was just a trivial error (that didn’t actually affect the calculated value) in a small spreadsheet; imagine the difference that Rainbow Pro could make with a large spreadsheet where the results actually matter. With prices starting from just £29 for commercial use, can you afford not to have Rainbow Pro on your Excel menu?

Check out Rainbow for free

Rainbow Pro tab


Rainbow Analyst is a spreadsheet auditing add-in for Microsoft Excel that has been ranked #1 in an independent study at the University of Stuttgart. It comes in two versions, Rainbow Analyst Professional (Rainbow Pro) and Rainbow Analyst Personal, and as you can see from the composite screenshot above, the latest version of Rainbow Pro offers you a choice of two different menus (Standard and Advanced), giving you access to a complete Swiss Army Knife of Excel spreadsheet audit tools to help you find even the most well-hidden spreadsheet errors. Click the buttons below to check out either version of Rainbow for free:

Download Rainbow Analyst Professional 8.1, our flagship product for Excel 2007 onwards (30-day free trial).

Download Rainbow Analyst Personal 5, an older version of Rainbow for Excel 2000 onwards (completely free).

After downloading, simply double-click the downloaded file and follow the instructions to install Rainbow for your copy of Excel. And if you’ve any questions, just visit our Installation page or send us an email.

Why choose Rainbow?

The slides on the right (which we’ve now updated to reflect the latest Rainbow Pro version 8.1) illustrate some of Rainbow Pro’s key features; just click on any slide to see more information about the relevant feature.

Of course there are competitor products that have a few features that Rainbow doesn’t have, and Rainbow has some features (such as the Logic Map and the Data Explorer) that our competitors lack. But we think that Rainbow stands out from the crowd for its exceptional usability and user interface. To find out for yourself, just click the button above to download your free trial copy, or go to our Products page to buy a copy for yourself.

And if you’re using Excel 2013 or Office 365 with the free Spreadsheet Inquire add-in, you should probably read this independent report which explains why the Inquire add-in is no substitute for a tool like Rainbow Pro. You’ll see from pp.4-5 of the report that because of the way it looks at formulas, Spreadsheet Inquire wouldn’t even help you find the error in our “Rainbow test” above.

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