Excalidraw is described as 'Open-source whiteboard tool that lets you easily sketch diagrams that have a hand-drawn feel to them. Available directly online as a web app and also through CodeSandbox to easily see how the code works, and the app vailable for self-hosting' and is a very popular Diagram Editor in the photos & graphics category. There are more than 50 alternatives to Excalidraw for a variety of platforms, including Web-based, Windows, Mac, Linux and Android apps. The best Excalidraw alternative is draw.io, which is free. Other great apps like Excalidraw are Xournal++, LibreOffice - Draw, Miro and Dia.
Excalidraw alternatives are mainly Diagram Editors, but if you're looking for
Mind Mapping Tools or Whiteboards you can filter on that. Other popular filters include
Open Source and
Whiteboard. These are just examples - use the filter bar below to find more specific alternatives to Excalidraw.
Im using excalidraw for teaching purposes. Even if miro was opensource, for this particular purpose it is trash