Best Prismm / AllSeated Alternative for Wedding Seating (2026)

Quick answer

With Prismm closed to new events since 26 August 2026 and existing events going view-only after June 2027, 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 venue diagramming tool at $0 free, $49, $150 and $320 a month, 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 standalone seating-chart makers: 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.

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It is the platform migration nobody planning weddings asked for. AllSeated became Prismm, Cvent acquired Prismm, and now Prismm is being sunset: since 26 August 2026 new events can only be created in Cvent Event Diagramming, existing Prismm events stay editable through June 2027, and after that Prismm work remains in Cvent in view-only mode. 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.

26 Aug 2026

Last day new events could be created in Prismm, per Cvent's migration page - new events now go to Cvent Event Diagramming

June 2027

Prismm access ends; existing work stays in Cvent in view-only mode, 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 on October 19, 2026 on the named company's own pricing page, and the dates were rechecked on 19 October 2026 after Cvent moved the sunset date. 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, Cvent Registration link on Enterprise	No - import or type guests	No - CSV import only	Yes - confirmed guests become cards
Meal choices on the chart	Manual attendee data	Imported or typed by you	In its exports, from your imported list	Per guest, exports for the caterer
Allergy / dietary flags	Manual notes	Not stated	Allergy summary in its exports, from your list	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 / $49 / $150 / $320 a month	$8.99/mo or $50 once	$19.99 one-time	$19.99/mo or $189 once

Every competitor cell, price and the migration timeline were checked on October 19, 2026 on each company's own pages: Cvent's migration page, Cvent Event Diagramming's pricing and product pages, PlanSeats' pricing and wedding pages, and SeatCanvas' pricing page; the linked sources are listed at the end of this article. Cvent Event Diagramming is built for to-scale venue diagramming rather than RSVP lists; 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, and its link to Cvent Registration, a separate product, comes on the Enterprise plan; 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, $49, $150 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

+To-scale 2D/3D venue diagramming
+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

PlanSeatsA standalone seating-chart maker, with no RSVP flowing in

PlanSeats draws seating charts only: drag-and-drop tables with guest tags, seating rules and an auto-assign, with the Plus plan at $8.99 a month or $50 once for three events and unlimited events for professionals at $39.99 a month, and every guest typed or imported by hand.

What it does not do is collect the answers that the picture is supposed to reflect. It does not collect RSVPs itself: replies and meal choices come in by spreadsheet import or by typing, allergy tracking is not stated on its pages, and you keep it all 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

+$8.99/mo, $50 once, or $39.99/mo unlimited
+Drag-and-drop with seating rules and auto-assign
+Free tier for a first event

Falls short

−No RSVP collection at all
−Meals imported or typed, dietary tracking not stated
−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 and no live connection to how people actually replied, and the meal and allergy notes in its exports come from the list you imported. 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.

SeatCanvas prices one chart for one event, and it is not the guest list itself, so every RSVP, meal and allergy is retyped into it.

Works well

+Pay once - free to 40 guests, then $19.99 one-time
+CSV import, 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, meals and allergies only as imported
−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

See planner pricing →

Terracotta wedding invitation suite with the printed QR card and two phones - one showing the wax-sealed envelope, the other showing the seating plan and reception floor plan with tables, dance floor, DJ booth and bar

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 up to three languages, each guest picking theirs 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 is the job that tool is built around, without the RSVPs. 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

Up to three languages 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

Wedding Planner AI that knows the couple's real wedding and makes the changes, with their confirmation

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:

The Private Wedding App's chart is built around the couple's live RSVP list, while Cvent Event Diagramming, where Prismm accounts are being moved, is a 2D/3D diagramming product priced from free to $320 a month, built around the room rather than that list.

The Private Wedding App collects the RSVPs, meals and allergies behind the chart, while PlanSeats ($8.99/mo or $50 once) and SeatCanvas ($19.99 one-time) do the layout only, with the RSVPs, meals and allergies 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.

SourcesEvery fact on this page, with the date it was checked

The Private Wedding App, checked October 19, 2026: pricing ($19.99/month with a 3-day free trial, or $189 once), the seating chart (confirmed guests become seatable cards, reception layout with dance floor, DJ booth and bar) and the meal and allergy tracker (meals per guest, severe-allergy flag, caterer day sheet).

Cvent Event Diagramming, checked October 19, 2026: Prismm to Cvent Event Diagramming migration page (CED-only event creation since August 26, 2026, existing Prismm events editable through June 2027, view-only in Cvent after that, users moved to CED); pricing page (Free $0, Standard $49, Pro $150 and Premium $320 a month billed monthly, Enterprise tailored plan with integration with Cvent Registration and 3D rendering); Event Diagramming page (to-scale diagrams, real-time 3D previews).

PlanSeats, checked October 19, 2026: pricing page (Free Starter for 1 event up to 20 guests; Plus $8.99 a month or $50 once for 3 events; Pro $39.99 a month for unlimited events; CSV import, guest tags, seating rules and auto-assign); weddings page (guest list imported from a spreadsheet with RSVPs and meal choices).

SeatCanvas, checked October 19, 2026: pricing page (free up to 40 seated guests, Event Pass $19.99 one-time for a single event, CSV import, PDF, PNG and CSV exports with per-table meal assignments and a dietary summary).

Spotted a fact that has changed? Tell us through the contact page and it will be re-checked and re-dated.

See it for yourself.

Everything a planner runs client weddings on: a portfolio of your season, the caterer day sheet, the run of show with per-vendor links, studio templates, couple access, client invoicing with deposits and contracts your couple signs online - plus each wedding's invitation, RSVP, guest list, seating, budget, vendors and AI planner.

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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 a venue diagramming tool (free, $49, $150 or $320 a month) built around the room rather than a live RSVP list. PlanSeats ($8.99/mo or $50 once) and SeatCanvas ($19.99 one-time) are standalone seating-chart makers with no RSVP collection.

When is Prismm shutting down?

According to Cvent's migration page, checked 19 October 2026, the sunset date moved: since 26 August 2026 new events can only be created in Cvent Event Diagramming, existing Prismm events stay editable through June 2027, and Prismm access then ends, with Prismm-created work remaining in Cvent in view-only mode.

Is Cvent Event Diagramming a good replacement for a wedding?

For a wedding, The Private Wedding App fits better: its seating chart is fed by the RSVPs, so meal choices and allergy flags flow in from the invitation. Cvent Event Diagramming, the official successor to Prismm with a free tier and paid plans at $49, $150 and $320 a month, is built for to-scale venue diagramming around the room, not around a couple's live RSVP list, so meal choices and allergy flags stay manual attendee data.

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 (Cvent links to its own Registration product on its Enterprise plan), so wedding 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?

The Private Wedding App is $19.99 a month or $189 once, and that single price covers the guest list, RSVP, seating chart, budget, vendors and the caterer day sheet rather than the diagram alone. The dedicated floor-plan tools price the diagram by itself and leave the rest to you: SeatCanvas $19.99 one time, PlanSeats $8.99 a month or $50 once for three events and $39.99 a month for unlimited, Cvent Event Diagramming free, $49, $150 or $320 a month at venue scale.

I used AllSeated - where did it go?

AllSeated rebranded to Prismm, Cvent then acquired Prismm, and Prismm is now being sunset: no new events since 26 August 2026, existing events editable through June 2027 and view-only in Cvent after that, 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.

Keep reading

ComparisonWedding Planner Software for Client Weddings: The 2026 Comparison11 min read GuideHow Wedding Planners Manage RSVPs for Multiple Clients8 min read GuideHow to Take Deposits and Set Up Payment Plans for Wedding Clients8 min read

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