QuickBooks Online Advanced Fathom is a third-party financial analysis and reporting tool that integrates with QuickBooks Online Advanced, though it is no longer included with the subscription. Users can connect Fathom to QuickBooks to create advanced financial reports, forecasts, and dashboards, and to analyze key performance indicators (KPIs). While it used to be a built-in feature of QuickBooks Online Advanced, now it must be purchased separately and integrated through the QuickBooks app store. 

Fathom provides in-depth analysis of your business performance, including visual displays of KPIs, profitability graphs, and break-even analysis. It transforms raw QuickBooks data into actionable intelligence. Fathom​‍​‌‍​‍‌ was previously bundled at no additional cost with QuickBooks Online Advanced. After August 2022, Intuit decided to stop offering the bundle for free, so new QBO Advanced users do not receive Fathom ​‍​‌‍​‍‌complimentary. Existing users were moved to a paid Fathom subscription if they wanted to continue using it. You can still integrate Fathom with QuickBooks, but only with a separate paid Fathom account. QuickBooks now promotes its own built-in tools like Performance Center, Custom Report Builder, and Spreadsheet Sync as alternatives.