Microsoft Visio vs Excalidraw: What are the differences?
Developers describe Microsoft Visio as "Diagramming made simple". Create flowcharts, diagrams, org charts, floor plans, engineering designs, and more, using modern shapes and templates with the familiar Office experience. On the other hand, Excalidraw is detailed as "Virtual whiteboard for sketching hand-drawn like diagrams". It is a whiteboard tool that lets you easily sketch diagrams with a hand-drawn feel.
Microsoft Visio and Excalidraw can be primarily classified as "Diagramming" tools.
Excalidraw is an open source tool with 9.24K GitHub stars and 619 GitHub forks. Here's a link to Excalidraw's open source repository on GitHub.