Excalidraw
Free hand-drawn style virtual whiteboard for sketching diagrams, with live collaboration.
Free planWeb
PriceFree forever; Excalidraw+ $6/user/month paid yearly or $7/user/month paid monthly
We have not written a full review of Excalidraw yet. What is here comes from its official website and app store listing.
Best for
people who want it freeprivacyopen source fanskeeping it simple