Tool comparison
Seatwise vs Prismm (formerly AllSeated)
Prismm, which used to be AllSeated, is owned by Cvent and is being retired. New events already have to be made in Cvent Event Diagramming. If you are rebuilding a wedding, gala or dinner somewhere else, this page sets out what is happening to Prismm, what Seatwise does and costs, and where each fits.
What Prismm (AllSeated) costs and does
- New events can only be created in Cvent Event Diagramming. The last accounts were switched over on August 26, 2026. As of September 29, 2026, per Cvent's Event Diagramming resources page for Prismm users.
- Existing Prismm events can still be edited until June 2027, when Prismm access ends. After that, Prismm work stays in Cvent as view-only. As of September 29, 2026, per Cvent's Event Diagramming resources page for Prismm users.
- Cvent moved this date. Its migration FAQ still says Prismm events turn view-only on October 1, 2026, and some migration guides give December 31, 2026; Cvent's newer resources page says it extended editing to June 2027. As of September 29, 2026, per Cvent's Event Diagramming resources page for Prismm users.
- Templates are not carried over to Cvent Event Diagramming automatically, and Prismm events dated before January 1, 2022 do not appear there. As of September 29, 2026, per Cvent's Prismm migration FAQ.
- Paid Prismm accounts keep their current plans, prices and limits unless they choose a new Cvent Event Diagramming plan. As of September 29, 2026, per Cvent's Event Diagramming resources page for Prismm users.
- Cvent Event Diagramming has a free plan capped at 3 events; venue plans are $150 to $320 a month with a 12-month commitment. As of September 29, 2026, per Floors.live's Prismm migration page.
- Prismm covers floor plans, guest lists, seating assignments, event collaboration and 3D event visualization. As of September 29, 2026, per PlanSeats' Prismm comparison page.
Prices and features change. Check their page before you buy.
What Seatwise costs and does
- Free to build: paste or import a guest list, add tables, set keep-together and keep-apart rules, press Auto-seat, and preview every export full size on screen.
- $12 once for one event turns on printing and Copy as text for the floor plan, per-table lists, the find-your-seat board and the escort-card CSV. No subscription.
- The Planner licence is $49 a year for unlimited events, with your name and logo on each export.
- No account. The plan is saved in your browser and never uploaded.
- No 3D rendering, room measurement, live co-editing or QR seat finder.
Side by side
| Feature | Prismm (AllSeated) | Seatwise |
|---|---|---|
| Paid price | Existing plans kept through the transition; no new sign-ups | $12 once for one event (Pro key) |
| Pricing model | Subscription | One-time per event, or a yearly Planner licence |
| Status | No new events since Aug 26, 2026; existing events editable until June 2027, then view-only in Cvent | Active |
Rows we have no dated note on for Prismm (AllSeated) are left out rather than guessed.
Who should pick which
Pick Prismm (AllSeated) if
- You need 3D room rendering, AV or rigging diagrams, room measurement, or live co-editing with a client. Seatwise has none of these. Cvent's Event Diagramming is the path Cvent offers.
- Your company already buys Cvent and wants every event in one enterprise system.
Pick Seatwise if
- You used Prismm for guests, tables and seating rules, and want the same job done in a browser tab with no account.
- You run one event: building and auto-seating is free, and printing is $12 once.
- You run many events: the Planner licence is $49 a year for unlimited events, with your name and logo on each export.
- Your client asks where the guest list is stored. In Seatwise it stays in your browser and is never uploaded.
Moving from Prismm to Seatwise
Cvent says existing Prismm events stay editable until June 2027, and after that Prismm work is view-only inside Cvent. Cvent has moved this date once already, so export what you need now rather than waiting. Seating layouts do not transfer between tools; the guest list does.
- Export the guest list. In Prismm, open Reports, set the report type to Guests, pick the fields (name, party, RSVP, meal), press Generate, then Export to CSV. Do it for each event.
- Paste it into Seatwise. Open Seatwise, press Import list in the Guests panel, choose "CSV with header row" and paste. Columns named name, household, group, rsvp, meal and notes are picked up; email, phone and table columns are ignored.
- Rebuild the tables. Add each table with its shape and seat count. Save a PDF of the old Prismm floor plan first so you have the layout to copy.
- Rewrite the rules. Prismm's seating logic does not export. Open a guest's editor and add pairs under Keep together or Keep apart. People in the same household stay together without a rule.
- Lock, then auto-seat. Seat the head table and family tables by hand, lock them, and press Auto-seat for everyone else.
The full step-by-step, with what to write down before the cutoff, is in Prismm/AllSeated Is Shutting Down: What to Do Now. Planners moving several events can read about the Planner licence.
Paste your list and press Auto-seat. Building is free, no account.
Open Seatwise