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Allseated has become Prismm

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Supercharge your planning with 3D event diagramming

Experience the future of event planning with Prismm’s dynamic 3D event diagramming tools. From visualizing your event space in photo-realistic 3D designs to coordinating every detail, Prismm is your key to planning an event more efficiently. Simple!.
A conference room with neatly arranged tables and chairs facing a podium, large windows in the background, and modern ceiling lighting, meticulously designed through 3D Event Diagramming.

Prismm is the ultimate 3D event diagramming solution

Revolutionizing event planning with its cutting-edge 3D planning and design tools and seamless collaboration features. From creating stunning 3D diagrams to managing guest lists and coordinating every detail, Prismm empowers event planners to bring their vision to life. With Prismm, event planning is not just efficient; it’s an immersive and sustainable experience that ensures every event is unforgettable.

Image of the Prismm platform's immersive 3D visualization. It shows rows of virtually generated white chairs placed inside a 3D rendering of a real building.

Immersive 3D Visualization

Design stunning 3D diagrams of your event space, providing a realistic and immersive preview of the final day of execution. Visualize layouts, decor placement, and overall ambiance, ensuring every detail is picture perfect before an event.

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Image of the Prismm platform's Real-Time Collaboration. A person in a suit is waving hello while a space is being shown.

Real-Time Collaboration

Achieve seamless collaboration among event planners, team members, and stakeholders. Share your 3D diagrams with others, make real-time updates, and receive instant feedback, ensuring everyone is on the same page and there’s no surprises. Boo! (Other than that one.).

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Prismm platform's sustainable diagramming is being shown in the image.

Sustainable Diagramming

Minimize waste and reduce environmental impact. The Prismm platform allows planners to manage every detail, including waste management, food, and beverage planning, ensuring events are memorable, good for the planet, and good for the finances.

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The one source of truth to unite them all

Blue, green, teal — everyone sees things in their own unique way, which is why it’s ideal to manage them all from one centralized event planning platform that enables you to cut through confusion and get to commitment.


A person with short hair smiles while typing on a laptop, with a glass of water in the foreground and an orange geometric pattern in the background, possibly working on some 3D event diagramming.

Diagram your event, your way

Streamline your event diagramming with the flexibility to cherry-pick what features you want, and create the go-to space to collaborate on your design for your team and stakeholders.

A curious man looks up in the middle of a conversation about an event the team is planning.

Last-minute magic

With our collection of pre-existing layouts you can perform event diagramming wizardry, making changes and updates up to the last minute. No stress, no fuss, just pure magic. And don’t worry, our platform will notify all the relevant parties, so everyone’s in on the enchantment!

A woman in a blue shirt gestures while explaining the value of dynamic 3D layouts.

One stop shop

Why juggle multiple tools when you can have everything you need in one place? No more switching between apps or scratching your head over complex diagrams. With Prismm, designing and sharing dynamic 3D layouts is a piece of cake!


Allseated (now Prismm platform) has made planning events so much easier! I cannot imagine going back to PDF files nor can I imagine what it was like before we were able to collaborate in real time with our clients. We adore the 3D tools and seeing our floor plans come to life is a game changer for our clients.”

Warren Dietel
Owner & President, Puff N Stuff Catering & Events


  • The Prismm platform is a transformational bridge between real and virtual worlds, evolving how people visualize, design, plan, sell, and experience spaces.

  • Put simply, it’s software that interacts with real-world locations. It’s used to visualize, manipulate, analyze, display, and record physical environments.

  • You can create multiple floor plans for different layout options of the same event.

  • No, we want to make this technology as accessible as possible. All that is needed is an internet connection. Easy!

A grand ballroom from The Plaza New York with ornate decor is set up for an event with round tables covered in white tablecloths and white chairs arranged around each table.

Customer profile

Changing spaces at the Plaza


At the Plaza, the hottest spot north of Havana, music and passion were always the fashion with CPS Events overseeing all social, corporate, and non-profit events. And the event managers needed a platform to create to-scale renderings of their spaces for each new event. The perfect challenge for Prismm to answer.

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