EventDiagram
7.3#1 in event diagramming softwareFree planFree planWebAPI
VisitEventDiagram vs OnePlan
What both publish
| Fact | EventDiagram | OnePlan |
|---|---|---|
| Exports | PDF, image and data exports are available on every plan; Free exports contain a watermark. | Pro includes high-resolution PNG event plan and CSV inventory exports, while the Free plan provides low-resolution watermarked PNG export. |
| Headquarters | Phoenix, Arizona, USA | London, England, UK |
| Integrations | EventDiagram provides an MCP server and API keys so users’ Claude or other AI tools can read and write diagrams. | OnePlan features Google Satellite map choices and what3words location sharing; the official features page also describes importing CAD and custom imagery as overlays. |
| Intended users | The product is presented for hotels and venues, corporate and wedding planners, caterers, rental companies, and AV and production teams. | The site names festivals, local government, road events, venues, sports federations, and students among its event-planning audiences. |
| Product | EventDiagram is a web application for creating, sharing, and collaborating on event floor plans and diagrams. | OnePlan is a visual platform for planning event sites and venues collaboratively with suppliers, vendors, local authorities, security services, and other partners. |
| Security | The maker says passwords use salted bcrypt hashes, sessions use signed expiring tokens in HTTP-only cookies, and traffic uses HTTPS. | OnePlan says it is hosted on AWS, uses encryption at rest and in transit, offers two-factor authentication and single sign-on, and conducts regular security audits. |
EventDiagram plans
- FreeFree
- Venue Group / Enterprise$9 a year
- Solo$9 a month
- Pro$18 a month
- Event Pass$24, paid once
- Small Venue$49 a month
OnePlan plans
- FreeFree
- Team$90 a month
- Pro$99 a month
- Team$900 a year
- Pro$984 a year
Pick EventDiagram if…
EventDiagram is presented for hotels and venues, planners, caterers, rental companies, and AV and production teams. It suits people who need to create and share event layouts with collaborators or clients.
Pick OnePlan if…
OnePlan suits event planners and partner teams working on site layouts, venue plans, or event logistics. Its listed audiences include festivals, local government, road events, venues, sports federations, and students.