Best Prismm / AllSeated Alternative for Wedding Seating (2026)

Quick answer

With Prismm going view-only on 1 October 2026 and closing on 31 December, the best wedding seating alternative in 2026 is The Private Wedding App ($19.99/mo, or $189 once), because its seating chart is fed by the same guest list the couple's RSVPs land in: a guest confirms, picks a meal and notes an allergy, and they appear as a seatable card, so a late change updates the tables and the caterer counts instead of forcing a retype. Cvent Event Diagramming, the successor Prismm accounts are moved into, is a capable venue diagramming tool at $0 free, $150 and $320 a month, but it is built around the room, not a couple's live RSVP list. PlanSeats ($8.99/mo or $50 once, $39.99/mo for professionals) and SeatCanvas ($19.99 one-time) are inexpensive, focused seating-chart makers, but both are standalone: you import or type the guests and there is no RSVP flowing in. But the real distinction is bigger than the chart: the alternatives Prismm points to are seating tools and nothing more, while The Private Wedding App is a complete wedding platform - the cinematic digital invitation your guests open (bilingual, with your story, schedule, song requests and RSVP), the guest list, the caterer day sheet, the budget, the vendor manager and an AI planner - with the seating chart as one page of it, fed by the RSVPs the invitation collects.

It is the platform migration nobody planning weddings asked for. AllSeated became Prismm, Cvent acquired Prismm, and now Prismm is being switched off: on 1 October 2026 every event, floor plan and report turns view-only, and on 31 December 2026 access to prismm.com ends entirely. Anyone who ran their tables in AllSeated or Prismm now has to move, and the tools they are being pointed to are all the same shape as what they are leaving - a standalone diagram of a room that you fill with guests by hand, then keep in sync with a guest list that lives somewhere else. For a wedding, that somewhere else is the RSVPs. We compared the realistic destinations on the one thing that decides the final fortnight: whether the seating chart is fed by the guests who actually replied, or rebuilt by hand every time an answer changes. And it is worth saying plainly up front, because the shape of the choice is easy to miss: the tools Prismm points you to are seating tools and nothing else, while one of the options here is an entire wedding platform where the seating is a single page, fed by the invitation your guests open.

1 Oct 2026

Prismm turns view-only, per Cvent's own migration pages - new events must move to Cvent Event Diagramming

31 Dec 2026

Access to prismm.com ends and system support is turned off, per Cvent

Fed by RSVPs

The Private Wedding App seats the guests who actually confirmed, with their meals and allergies - not a list typed in twice

A note on method: the shutdown dates are taken from Cvent's own community and migration pages, not from third-party blogs - Prismm's marketing site now only says it is part of Cvent. Every price below was checked in September 2026 on the named company's own pricing page. We compared the tools on the question a wedding actually turns on, which is different from the question a corporate event turns on: not how precisely you can draw the room, but whether the seating chart knows who replied, what they are eating and who cannot sit near the nuts - because for a wedding that information changes every day for the last two weeks.

At a glanceSide-by-side comparison

What decides it	Cvent Event Diagramming	PlanSeats	SeatCanvas	Private Wedding App
Fed by live RSVPs	No - diagram you populate	No - import or type guests	No - CSV import only	Yes - confirmed guests become cards
Meal choices on the chart	Manual attendee data	Not tracked	Not tracked	Per guest, exports for the caterer
Allergy / dietary flags	Manual notes	Not tracked	Not tracked	Severe-allergy flag, by table
Built for	Venues and corporate events	Seating charts, any event	One event, seating only	Weddings, end to end
Room layout / floor plan	To-scale 2D/3D diagramming	Drag-and-drop layout	Layout and export	Reception layout: dance floor, DJ, bar
Everything else a wedding needs	Diagramming module only	Seating only	Seating only	Invitation, RSVP, guest list, budget, day sheet, AI
Where you use it	Browser, venue-oriented	Browser	Browser	Any phone or computer, nothing to install
Price	Free / $150 / $320 a month	$8.99/mo or $50 once	$19.99 one-time	$19.99/mo or $189 once

Prices and the migration timeline are as published on each company's own pages in September 2026: the 1 October view-only and 31 December discontinuation dates from Cvent's own community and migration pages, Cvent Event Diagramming's $0 / $150 / $320 tiers and its Enterprise quote from cvent.com, PlanSeats from planseats.com, SeatCanvas from seatcanvas.app. Cvent Event Diagramming is genuinely the stronger tool for to-scale venue diagramming; the comparison here is specifically about weddings, where the chart's link to live RSVPs matters more than draughtsmanship. Details change; verify before you commit.

Review 01Cvent Event Diagramming

Cvent Event DiagrammingThe place Prismm sends you - a venue diagramming tool, not a couple's RSVP list

This is where Prismm accounts are being moved, and as a diagramming product it is the most capable tool in this comparison: to-scale 2D and 3D floor plans, a large library of venue layouts, the polish you would expect from the platform behind a big slice of the events industry. If your work is laying out ballrooms precisely, this is a serious tool, and there is a genuinely free tier to start on.

It is built around the room, though, not around a couple's live guest list. Attendee data is something you manage inside the diagram; there is no wedding RSVP flowing in on its own, no meal choice attached to a guest that a caterer can be handed, no severe-allergy flag that follows a name to a table. Pricing runs $0 free, $150 a month and $320 a month, with an Enterprise tier quoted by their team - sized for venues and event businesses rather than one wedding.

For a venue that diagrams dozens of events a year it is the natural home. For a couple, or a planner running weddings where the seating exists to serve the guests who replied, it answers the drawing question and leaves the RSVP question where it was.

Works well

+The strongest to-scale 2D/3D venue diagramming here
+Large venue layout library
+A real free tier to start on
+Backed by Cvent's scale and support

Falls short

−Built around the room, not a live wedding RSVP list
−No meal choices or allergy flags tied to guests
−Monthly pricing sized for venues and event businesses
−A diagramming module, not a full wedding platform

Review 02PlanSeats

PlanSeatsAn inexpensive, focused seating-chart maker - and only that

PlanSeats does one job cleanly: drag-and-drop seating charts with guest tags, seating rules and an auto-assign that fills tables for you. It is cheap and quick to start - a single event is $8.99 a month or $50 once, and professionals running several get unlimited events at $39.99 a month - and for someone who just wants the picture of the tables, it is a tidy answer.

What it does not do is collect the answers that the picture is supposed to reflect. There is no RSVP, no meal-choice field, no allergy tracking; you bring the guest list in by import or by typing it, and you keep it current yourself. When a guest cancels three days out, PlanSeats does not know until you tell it, and the caterer's count is a separate document you update by hand.

As a seating-chart tool bought for the layout alone, PlanSeats is fair value. As a replacement for a wedding workflow, it is the diagram without the guest list underneath it.

Works well

+Inexpensive - $8.99/mo, $50 once, or $39.99/mo unlimited
+Clean drag-and-drop with seating rules and auto-assign
+Free tier for a first event
+Genuinely focused and quick to learn

Falls short

−No RSVP collection at all
−No meal choices or dietary tracking
−Guest list imported or typed, kept current by hand
−Seating only - nothing else a wedding needs

Review 03SeatCanvas

SeatCanvasA one-time seating chart for a single event

SeatCanvas is the pay-once option: free up to forty guests, then a single Event Pass at $19.99 for unlimited. You import a guest list from a spreadsheet, arrange the tables, and export a clean PDF or image to print or share. For a small wedding, or as a last-minute chart layered on top of a guest list you already keep elsewhere, it is a reasonable, cheap fix.

It is deliberately narrow. The guests arrive by CSV and stay exactly as imported; there is no RSVP, no meal or allergy data, no live connection to how people actually replied. It is a canvas for arranging a list you maintain somewhere else, which is precisely the setup Prismm users are trying to move on from rather than recreate.

For one event, one night, one printed chart, SeatCanvas is honest value. It simply is not trying to be the guest list itself.

Works well

+Pay once - free to 40 guests, then $19.99 one-time
+Simple import, arrange, export to PDF or image
+No subscription
+Fine for a small or last-minute chart

Falls short

−Guests imported by CSV, static after that
−No RSVP, meal or allergy data
−Single-event, seating only
−The list still lives, and is maintained, elsewhere

“

“A wedding seating chart is not a drawing of a room. It is a picture of who said yes, what they are eating and who cannot sit near the nuts - and all three change every day for the last two weeks.”

What the comparison came down to

Review 04The Private Wedding App

Not a seating tool - the whole wedding platform

The Private
Wedding App

$19.99/mo

or $189 once - the entire platform, of which the seating chart is one part

Terracotta art deco digital wedding invitation with RSVP on a phone beside its printed QR card - the guest-facing invitation that collects the RSVPs feeding the seating chart

Here is the reframe that matters when Prismm closes: the tools it is pointing you to are seating tools, and nothing else. Choosing The Private Wedding App is not choosing a better diagram - it is stopping paying for a diagram at all, and getting the entire wedding platform, of which the seating chart is one feature among many, fed by everything around it.

Start with what your guests receive, because the seating tools have no equivalent: a cinematic digital invitation they open on their phone, in any theme, that can run in two languages at once with a picker on opening and right-to-left Arabic supported. Inside it your guests find your Our Story page, the schedule for a multi-day or destination wedding where each event carries its own private link so people are only invited to what they are invited to, venue maps and dress code, background music as they scroll, a song-request field for your DJ, and a photo gallery for the day itself. They RSVP right there - accepting some events and declining others, choosing a meal, flagging a severe allergy, adding a named plus-one.

And every one of those replies flows inward. The RSVP fills the guest list with meals, allergies and plus-ones and a WhatsApp send button per guest; it feeds the seating chart, where only confirmed guests appear as cards you drag onto tables and lay out with a dance floor, DJ booth and bar; it drives the caterer day sheet with the per-table breakdown and the final numbers; it updates the budget with its deposit and instalment tracking, the vendor manager across thirteen categories with quotes and scorecards, the checklist, the moodboard, the gift registry, and an AI wedding planner that already knows the couple's date, venue, guests and budget and researches vendors with sources. Planners run every client wedding of it from one portfolio, with reusable templates, a run of show with per-vendor links, and couple access they control section by section.

The honest limit is the same one Prismm users know: this is not to-scale CAD, and it is not the 3D venue diagramming Cvent Event Diagramming does - if your job is drawing ballrooms precisely for many venues, that tool draws better. What this is instead is the whole wedding, in one private link, on any phone or computer with nothing to install, at $19.99 a month or $189 once rather than a monthly venue subscription. You were never really shopping for a seating diagram. You were keeping a wedding organised, and the diagram was one page of it.

The entire platform - the seating chart is one feature of many

Guests open a cinematic invitation: your story, schedule, music, gallery

Bilingual with a language picker, right-to-left Arabic supported

Multi-day and destination: a private link per event, RSVP per event

RSVP with meals, severe-allergy flag, named plus-ones, song requests

Everything flows in: guest list, seating, day sheet, budget, vendors

AI wedding planner that knows the couple's real wedding

Planners run every client wedding from one portfolio

$189 once on any phone or computer - not a monthly venue fee

The invitation below is live. Click around and see exactly what your guests will experience:

Explore it before you buy

Your invitation

Click to switch theme

Tap the nav to explore sections

Your studio

Click to explore

Click around and tap ? for a tour

VerdictWhich app should you use?

It depends on what you're optimising for:

If your work is drawing venues precisely, Cvent Event Diagramming is the strongest tool here and the one Prismm accounts are being moved into - a capable 2D/3D diagramming product, priced from free to $320 a month, built around the room rather than a couple's live RSVP list.

If you want a cheap, focused seating chart and you keep your guest list somewhere else, PlanSeats ($8.99/mo or $50 once) and SeatCanvas ($19.99 one-time) both do the layout cleanly - as long as you accept that the RSVPs, meals and allergies are yours to track by hand, because neither tool collects them.

And if the point of the seating chart is to reflect the guests who actually replied - so a late cancellation updates the tables and the caterer count at once, and every seat carries its meal and its allergy flag - The Private Wedding App's seating chart is the one built that way, because it is fed by the same guest list your RSVPs land in. See it on the seating chart page, or open the live demo wedding and drag a confirmed guest onto a table the way you would the week of the wedding. Planners running several client weddings can run every seating chart from one planner account.

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Frequently asked questions

What is the best alternative to Prismm and AllSeated for weddings?

For weddings, The Private Wedding App ($19.99/mo or $189 once) is the strongest alternative, because its seating chart is fed by the same guest list the couple's RSVPs land in - a guest confirms, picks a meal and notes an allergy, and becomes a seatable card, so late changes update the tables and the caterer counts without a retype. Cvent Event Diagramming, where Prismm accounts are being moved, is the more capable venue diagramming tool (free, $150 or $320 a month) but is built around the room rather than a live RSVP list. PlanSeats ($8.99/mo or $50 once) and SeatCanvas ($19.99 one-time) are inexpensive standalone seating-chart makers with no RSVP or meal tracking.

When is Prismm shutting down?

According to Cvent's own migration pages, Prismm becomes view-only on 1 October 2026 - from that date events, floor plans and reports are view and export only, and new events must be created in Cvent Event Diagramming. On 31 December 2026 access to prismm.com ends completely and system support is turned off. Events created from January 2022 onward remain viewable inside Cvent Event Diagramming after the shutdown.

Is Cvent Event Diagramming a good replacement for a wedding?

It depends on the job. For to-scale venue diagramming it is the strongest tool in this comparison and the official successor to Prismm, with a free tier and paid plans at $150 and $320 a month. But it is built around laying out the room, not around a couple's live RSVP list: meal choices and allergy flags are manual attendee data rather than answers flowing in from the invitation. For a wedding where the seating exists to serve the guests who replied, a platform whose chart is fed by the RSVPs fits the workflow better.

Do any wedding seating tools sync with RSVPs automatically?

The dedicated floor-plan tools that Prismm users are pointed to - Cvent Event Diagramming, PlanSeats, SeatCanvas and similar - are standalone diagrams you populate by import or by hand, so RSVPs and meal choices do not flow in on their own. The Private Wedding App works the other way around: the seating chart is a view of the same guest list your RSVPs land in, so a guest who confirms and picks a meal becomes a seatable card automatically, and a cancellation updates the tables and the caterer count together.

How much does a wedding seating chart tool cost in 2026?

It ranges from a one-time $19.99 (SeatCanvas) up to venue-scale monthly plans. PlanSeats is $8.99 a month or $50 once for a single event, $39.99 a month for unlimited. Cvent Event Diagramming runs free, $150 or $320 a month. The Private Wedding App is $19.99 a month or $189 once, and that price is not only the seating chart - it includes the invitation, RSVP, guest list, budget and the caterer day sheet, so the seating is one part of the wedding platform rather than a separate subscription.

I used AllSeated - where did it go?

AllSeated rebranded to Prismm, Cvent then acquired Prismm, and Prismm is now being sunset: view-only from 1 October 2026 and fully discontinued on 31 December 2026, with accounts moved into Cvent Event Diagramming. If you used AllSeated or Prismm mainly for wedding seating, this is the moment to choose where it goes next - and for weddings specifically, a chart fed by live RSVPs and meal choices, like The Private Wedding App's, replaces the hand-maintained guest list that AllSeated always sat on top of.

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