# ModelTrail

> ModelTrail is an Excel add-in and a private web workspace that records every edit in a workbook, including edits made by an AI assistant, and turns each save into a numbered version with a cell-level diff you can review, compare, and restore.

Intelligent version control and tracking for Excel models. ModelTrail is for people who build financial and operational models in Microsoft Excel. It runs inside Excel on Windows, Mac, and Excel on the web, and stores versions in a private cloud workspace. It is free to start on Microsoft AppSource.

## Pages
- [Home](https://modeltrail.io/): Intelligent version control and tracking for Excel models
- [FAQ](https://modeltrail.io/faq): What ModelTrail is, how AI edits are tracked, and how it differs from Excel version history
- [Pricing](https://modeltrail.io/pricing): Starter is free. Pro is $12 per month. Team is $20 per contributor per month. Enterprise is quoted
- [Install](https://modeltrail.io/install): Install the Excel add-in from Microsoft AppSource
- [Support](https://modeltrail.io/support): Setup, sign-in, uploads, and billing
- [Privacy](https://modeltrail.io/privacy): What ModelTrail collects and what it does not
- [Terms](https://modeltrail.io/terms): Terms of service, plans, and refunds
- [Microsoft AppSource](https://appsource.microsoft.com/en-us/product/office/WA200012457): The Excel add-in listing

## Optional
- [Full product facts](https://modeltrail.io/llms-full.txt): the same facts, with complete answers, for models that want one document