Start with the messy version.
A quick sketch, a flowchart, a plan for Monday. Draw freely or open a template, then move things around until the idea makes sense.
A shared whiteboard for the things that are easier to draw than explain. Just you, your team, and space to work it out.
Free to use. Open source. Yours to make a mess of.
A few familiar tools. Plenty of ways to use them.
A quick sketch, a flowchart, a plan for Monday. Draw freely or open a template, then move things around until the idea makes sense.
Send an invite link and draw together. See each other's cursors, add a thought, and work through the same diagram in real time.
Copy a few shapes into another board. Export a PNG for a message, an SVG for a document, or save the editable board for later.
Pick a tool, or press its shortcut. Hold Space to pan and keep following the idea.
Give it a board. See where it goes.