Yes, Microsoft Visio and Microsoft Project are compatible with Microsoft Office suites but are not included and must be purchased separately. They complement Microsoft Office applications like Word, Excel, and PowerPoint and can be installed on the same computer alongside these. Pay attention to compatibility regarding version (year) and 32-bit or 64-bit.
Example 1: Microsoft Visio 2013 Prof Plus with Microsoft Office 2016 Prof Plus -> not compatible, so both programs cannot be used simultaneously on one system.
Example 2: Microsoft Visio 2013 Prof Plus with Microsoft Office 2013 Prof Plus -> compatible, both programs can be installed and used on one system without any problems.