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Explore the infinite possibilities of space with online event planning software from Prismm (formerly Allseated)
Trusted by marquee brands around the globe
Check out our top review ratings.
The Difference is Spatial Design Technology
Prismm changes how organizations and people connect, collaborate, and transact across virtual spaces, elevating the standard in spatial design technology. Beyond simple event planning software, Prismm is a platform designed to create and deliver full, dynamic experiences.
Press on where you want to go in the 3D virtual tour below.You can use your keyboard’s arrow keys to easily explore the space.
Love what you’re seeing?
Book a demo to learn how Prismm’s spatial design technology can best help you.
Showcase your space
No calendar, no chaos.
Take the stress out of scheduling onsite visits in between events. Prismm provides a dynamic digital twin so clients can tour your space when they want to, wherever they are. Change layouts effortlessly and add rich content overlays — marketing and personalizing your space has never been this simple.
Sell your space
There wasn’t anything to compare with pure imagination. There is now.
Don’t make your clients rely on their imagination to bring your space to life. With Prismm’s immersive 3D technology and event software, you can highlight unique features of your space and build their vision in real time, giving them confidence in your capabilities. Don’t dream it. Experience it.
Design and plan your event
One platform to rule them all.
With one intuitive centralized workspace, online event planning is simple. Create immersive 2D or 3D layouts with accurate-to-the-millimeter floor plans. Collaborating, creating, designing, and making changes is as easy as 1, 2…done.
Why Choose Prismm
Space is not the final frontier
Time is on your side
Go with the flow
Change space
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"With Allseated (now Prismm Platform) our clients’ experience was enhanced, being able to navigate easily on our venue spaces, with immediate visualisation of their set-up desires. Personalisation became instant, selling efficiency increased, all the involved parts are now staying easily in permanent contact.”
Director Of Event Management, JW Marriott Bucharest
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“Including Allseated (now Prismm Platform) as part of our selling process has given us the opportunity to show current and prospective clients our spaces in various setups, giving them the ability to envision their event with us before it takes place, without having them come onsite. This sets us apart from our competitors.”
Director of Convention Sales Germany, Scandic Hotels
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"Designing a space like this is very much like designing in a regular ballroom, you're sitting in the space, you have to think about egress, you have to think about crowd flow. This really parallels real life."
CEO & Creative Director, AOO Events
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"As a collective, we love using Allseated (now Prismm Platform)! Given that we have so many rooms with so many features, shapes, and sizes, it is great to have a tool to help us change our configurations quickly and easily."
Conference & Events Coordinator, Twickenham Stadium
Ready to get started?
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FAQs
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Event planning software, like Prismm, empowers you to virtually visualize, design, and refine your event space using a digital twin of your venue. This authentic simulation allows you to experiment with every element — from chair styles to bouquet colors — providing a real-life preview of how each decision impacts your event’s aesthetic and flow. For event professionals, Prismm is an indispensable tool that turns vision into virtual reality, covering the entire event lifecycle.
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Join thousands of event planners worldwide who benefit from our extensive database of venue templates. It’s not just about boasting—it’s about convenience. Start by creating your event in Prismm and select your venue from our preloaded options. If your venue isn’t listed, don’t worry; we’ll guide you through the simple process of uploading images and specifications to craft your venue’s digital twin.
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Showcasing your event design has never been easier. Prismm’s popular sharing feature generates a link to your event layouts and diagrams, which you can send via text, email, or direct message. This seamless sharing enhances collaboration and client engagement, making it a breeze to bring your vision to stakeholders and team members alike, ensuring a successful event.
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If you’re new to online event planning or to Prismm, we understand you might want to try before you fully commit. That’s why we offer a trial, showcasing why we are confident in our claim as the best event management software in the business. Contact our customer service team today, and we’ll tailor a trial package that lets you explore all the benefits of our innovative event management solution.
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While there may be other software that seems similar, not all event management platforms are on par with Prismm. Our distinguishing features include a user-friendly interface, dedicated support team, collaboration-enhancing capabilities, and exceptionally realistic digital twins. You’re already here—so consider your search for the ultimate event planning software complete.
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Prismm is versatile enough to cater to any gathering, transforming any venue from ballrooms to conference centers into a perfectly tailored event space. Our event planner tools streamline the process from concept to final design, ensuring your next event space is not only functional but also inspiring.
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Forget the hassle of in-person meetings for minor changes. Our event software enables real-time collaboration, allowing your event team—from marketers to florists—to access, modify, and comment on designs. This unified approach ensures aligned decisions and contributes to the flawless execution of your event. The key to successful event planning begins here.
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The event planning world moves fast, and so does our support team. Available 24/7 via live chat, we respond instantly to help with any inquiries. For more complex issues, we escalate them promptly as you navigate the nuances of event planning online, ensuring you always have expert support at your fingertips.
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