EventDiagram

EventDiagram helps hotels, event venues, planners, caterers, rental companies and AV crews lay out events to scale without CAD. Every table, chair, stage deck, LED wall and dance floor sits at its real size in feet and inches, so seat counts, capacity and spacing update as you build. Divisible ballrooms generate every airwall combination with its own capacity. One click turns the same plan into a 3D walkthrough to check sightlines and screen heights. Instead of emailing PDFs, share one live link where clients, venues and vendors comment and approve, with unlimited free collaborators.

Guest lists import from a spreadsheet for table assignments, meals and check-in, and an AI copilot drafts a layout from one sentence. Plans start free, then $9, $18 or $149 a month, billed monthly with open exports. A modern alternative to Social Tables, Prismm and AllSeated.