SeatingSorted vs Prismm

Looking for an AllSeated or Prismm alternative

Checked August 2026

What happened

If you came here from AllSeated, the short history is: AllSeated rebranded to Prismm, and on 24 April 2025 Cvent announced it had acquired the company. Cvent's own announcement describes Prismm as spatial event design technology used by “more than 5,500 event venues, hotels, planners and vendors”. It does not mention weddings, and it does not mention couples.

That is the whole of the change, and it is enough. A tool a lot of couples and small planners used for their own wedding is now part of an enterprise event platform whose stated audience is the venue on the other side of the table. Nothing about that is sinister — it is a reasonable place for that product to end up — but it does mean the person it is built for has changed.

One thing we will not tell you: several competing pages state a specific date on which the standalone Prismm platform shuts down. We could not find that confirmed anywhere by Prismm or by Cvent, so we are not going to repeat it as a fact to hurry you along. If you have data in there, ask Cvent directly what the timeline is and export it either way — which is good advice about any tool you do not own.

The short answer

If what you needed was a 3D, to-scale diagram of a real venue that the venue itself also works in, Prismm's lineage is genuinely good at that and Cvent will keep building it for exactly that audience. If what you needed was to work out who sits with whom for one wedding, you were always using a venue diagramming tool to solve a family problem, and you can stop.

PrismmSeatingSorted
Built forVenues, hotels, planners and vendors, per Cvent's own announcementThe person deciding who sits with whom
The hard part it solvesDrawing the room accurately and in 3DDeciding the seating, and keeping it right when the list changes
Asking guests anythingNoRSVP link, with a confidential “rather not sit with” question
Keep-apart rulesYou remember them while you dragStated once, enforced on every re-run
3D venue walkthroughYes — the reason to use itNo
Scale floor plans the venue signs offYes, from a venue libraryYour own layout, printable
Pricing modelEnterprise, quotedOne payment per event, from $50
If your numbers change on ThursdayRe-drag by handRe-run; pinned seats hold

Use Prismm when

  • You are a venue, or you are working inside one that already uses Cvent.
  • You need a to-scale, 3D diagram that a banqueting team will build the room from.
  • The seating itself is simple and the room drawing is the actual deliverable.

Use SeatingSorted when

  • You are one person deciding who sits where, and the room drawing was never the hard part.
  • There are people who cannot sit together and you would rather not be the one holding that list in your head.
  • You want to ask guests, privately, who they would rather avoid — the thing no diagramming tool asks.
  • You want to pay once for one event rather than talk to a salesperson.

The part people find out too late

The useful way to read the acquisition is not “the tool got worse”. It is that the category quietly split in two, and most people who used AllSeated for a wedding were on the wrong side of the split the whole time — using a room-drawing tool because it was the one they had heard of, for a job that is really about people.

Comparisons age. This one was last checked in August 2026 — if something here is out of date or unfair, tell us and it gets corrected.

Where these figures come from

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