Collaborative canvas for flowcharts, wireframes, mind maps and docs.
Whimsical is a visual workspace aimed at product teams, combining flowcharts, low-fidelity wireframes, mind maps, sticky-note boards and documents in one place. Boards can be edited together in real time and embedded in other tools.
A free tier with limits on the number of editable boards is available, with paid plans for larger teams; check the pricing page for current limits.
Boards can be viewed on a phone, but editing is far easier on a desktop browser.
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