If you are on the lookout for an able substitute, check out these 12 best Visio alternatives. With the diagramming software, you can create business diagrams, process diagrams, flowcharts, floor plans, and more with better precision. With a large collection of built-in templates and unique shapes, it is the go-to tool for anyone who wants to display information that can be easily visualized. Microsoft Visio is used by most of the major corporations and fortune companies as a diagramming tool.