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Description

EventDiagram is a web-based event floor plan and seating chart tool built by people who produce live events. Draw a room once or start from the venue's own plan, then drag in rounds, banquet tables, stage decks, LED walls, truss, bars and decor, all true to size. Seat counts and room capacity recalculate automatically, ballroom airwall splits carry their own capacities, and the same diagram opens in 3D with one click. Instead of emailing PDFs, send one share link: clients and vendors view, comment and sign off without creating an account. An AI copilot turns a sentence like "200 guests, rounds of 10, stage north" into a to-scale draft you approve. Plans start free, then $9, $18 and $149 per month with no annual contract. Teams leaving Social Tables or Prismm get free floor plan conversion.

Description

Prismm, the world's leading virtual platform, is designed to meet the needs of event professionals who want to streamline and digitize processes. They can also collaborate with their vendors and clients to create memorable experiences. Prismm’s virtual event organizers provide event professionals with digital organisation, operation efficiency, collaborative features, and the ability to achieve their planning goals. Prismm’s virtual event technology helps to increase the level of planning and organization for an event. This keeps everyone on task. The planning process is seamless when everything is stored in one location. It also provides efficiency and time-saving tools. Prismm's real-time updates make it easy for event professionals and planners to keep track of every detail.

API Access

Has API Yes 

API Access

Has API No 

Screenshots View All

Screenshots View All

Integrations

Caterease No 
Claude Yes 
Microsoft Excel Yes 

Integrations

Caterease Yes 
Claude No 
Microsoft Excel No 

Pricing Details

$9 per month
Free plan ($0, no credit card). Solo $9/mo (unlimited diagrams, clean exports). Pro $18/mo (3 editors, 3D view, full production library, branded exports). Business $149/mo (unlimited members, your own inventory, one venue converted for you). Venue Starter $49/property/mo and Venue $149/property/mo for venues. Enterprise custom. Billed monthly; annual saves about 2 months. Viewers and collaborators are always free.
Free Trial Yes 
Free Version Yes 

Pricing Details

No price information available.
Free Trial No 
Free Version No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) Yes 
In Person No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) Yes 
In Person No 

Vendor Details

Company Name

EventDiagram

Founded

2026

Country

Phoenix, Arizona, United States

Website

eventdiagram.com

Vendor Details

Company Name

Prismm

Founded

2015

Country

United States

Website

prismm.com

Product Features

Product Features

Venue Management

Attendee Management No 
Billing & Invoicing No 
Contract Management No 
Customer Management No 
Event Management No 
Food & Beverage Management No 
Multi-Facility No 
Reservations Management No 
Resource Booking No 
Sales Management No 
Staff Management No 

Virtual Event Platforms

Alerts/Notifications No 
Attendee Management No 
Customizable Branding No 
Event Management No 
File Sharing No 
Lead Capture No 
Live Audio/Video Chat No 
Live Text Chat No 
Mobile Access No 
Moderation No 
Pre-made Templates No 
Presentation Tools No 
Q&A No 
Reporting/Analytics No 
Social Media Promotion No 
Surveys/Polls No 
Virtual Booths No 
Virtual Lobby No 

Alternatives

Alternatives