Features

The event diagram that listens.

To-scale floor plans in real feet and inches, a 3D view of every room, share links your client can approve — and an AI copilot that sets the room from a sentence. Turn Instant off and it hands you a draft preview to approve before anything touches your plan.

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The AI layer

Tell the room what to do

Type “rounds of 10 for 180 guests, a 24-foot dance floor center, buffet along the north wall” and watch the layout build itself — to scale, seat counts live, everything still yours to drag and adjust. The copilot works on a hidden draft and shows you the result before anything touches your real diagram. It runs on Claude, the same AI a growing share of planners already talk to every day.

The copilot edits, you approve

Every AI change lands as a reviewable draft — accept it, tweak it, or throw it away. Fill a section with classroom seating, restage for a reception flip, clear the back of house. Plain English in, a to-scale plan out.

Your AI can use it too — MCP & API

EventDiagram ships an MCP server and API keys, so your own Claude or AI tooling can read and write your diagrams: “set up Thursday's ballroom like last month's gala, but for 40 more guests.” Social Tables, Prismm, and AllSeated have no equivalent — this is the moat.

The editor

Real feet. Real inches. Real capacities.

app.eventdiagram.com

Tables, chairs, staging, LED walls, truss, power — a full production library with physical dimensions, auto-arrayed seating, and live seat counts. Nothing lands “about right.”

216 objects, every one to scale

Tables, staging, AV, lighting, drape, tents and vehicles with real dimensions and heights, searchable by trade name, plus your own inventory with SKUs. See the whole library and which plan includes what →

Events are the folder

Every diagram lives in an event — with its dates, documents, contacts, and a six-stage workflow status. The whole gala in one place, not a pile of loose files.

Import your old plans

Bring a Social Tables or Prismm PDF export and get back a working, editable, to-scale diagram — not a background image. Your history survives the move.

Attendees & seating

Import your guest list, assign seats table by table, and export seating charts the caterer and captain can actually work from. More on the seating chart software.

The airwall model

Draw the ballroom once. Every combination derives.

A divisible ballroom isn't eight floor plans — it's one room with airwalls. In EventDiagram you define the space and its sections once; Salon A, AB, BCD, and the full ABCDEF all derive automatically, with the right dimensions and capacities. Change the room, and every combination updates. No other tool models this; everyone else makes you maintain a folder of stale variants.

Walk the room before load-in

app.eventdiagram.com

The 3D view renders from the same scene as the 2D plan — every item carries its real height, so the LED wall, the stage, and the drape line read the way they'll stand in the room. One source of truth, two views.

Sharing & approval

One link. Client sees it, comments, approves.

A shared diagram open in the browser with comment pins and an Approve button

Viewers need no account and never pay — sharing is free on every plan
Pinned comments land exactly where the question is
A real Approve button, stamped against the exact version approved
Recipients get the 3D view too — the client walks the room from the link
Optional email gate tells you exactly who opened the plan

See it on your own floor plan

Start free, import a PDF or draw a room, and put the copilot to work. $9/month when it earns a place in your week.

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