OnePlan
OnePlan: A detailed planning workspace for complex outdoor sites, routes, infrastructure, and teams. Ranked #14 of 24 in Event Diagramming Software by our editors (6.4/10); pricing: Free plan · paid from $75/user/mo (annual) · 5-day trial; best for large outdoor and complex-site events.
At a glance
- Editor score6.4 / 10
- PricingFree plan · paid from $75/user/mo (annual) · 5-day trial
- Best forLarge outdoor and complex-site events
- Free planYes
- Paid from$75/user/mo
- Seating plansYes
- Founded2019 · London, England, UK
- Facts checked21 Sep 2026
Where it wins
- To-scale maps support infrastructure, routes, capacities, and crowd areas
- Imports CAD, floor plans, and overlays for detailed site planning
- Real-time collaboration includes permissions and shared editing
Where it doesn't
- Free plans are limited to one event and 25 objects
- Paid plans start at $75 per seat per month when billed annually
- The platform is available on the web only
Our verdict on OnePlan
OnePlan is cloud-based event site planning software for event organizers, venues, agencies, local authorities, and operational teams. It supports indoor and outdoor events, from festivals and sports events to road events, traffic management, and crowd planning. Users can create to-scale plans on satellite, high-definition, and aerial maps; place infrastructure such as barriers, tents, toilets, vehicles, and signs; map workforce locations; and share plans with stakeholders. Multi-level layouts, measurements, exports, protected view-only links, and real-time collaboration extend its use beyond a simple venue floor plan.
Pricing is structured around a free entry point and two paid plans. The Free plan costs $0 per month and covers one event, up to 25 objects, a Google Satellite map option, a low-resolution watermarked PNG export, and Knowledge Hub support. Pro costs $99 per month on monthly billing or $82 per month when billed annually. It adds multiple events, unlimited objects on event plans, three levels per event plan, three PNG overlays, high-resolution PNG export, and CSV inventory export. Team costs $90 per seat per month monthly or $75 per seat per month annually, adding a Team Workspace, unlimited event plans and objects, up to six levels, six PNG overlays, roles and edit access, and onboarding and support materials.
The strongest fit is for teams that need a shared, map-based operational picture rather than a lightweight diagram. Area, capacity, barrier, and fencing measurements help with site logistics, while traffic routes, access planning, and crowd-management features address complex event movement. CAD, floor-plan, and overlay imports can connect existing planning materials to the event map, and view-only links support stakeholder review. The free tier is suitable for a small single-event plan, but larger events and collaborative teams will need a paid plan. Choose OnePlan for detailed site coordination and multi-team planning; choose another tool if you need a desktop application or only basic diagramming.
OnePlan pricing
All 3 OnePlan plans and prices →
OnePlan fact sheet
| Free plan | Yes |
|---|---|
| Paid from | $75/user/mo |
| Seating plans | Yes |
| Floor-plan import | Yes |
| Guest-list import | Not verified |
| Guest capacity | Not verified |
| 3D view | Yes |
| Team collaboration | Real-time |
| Free trial | 5 days · no card needed |
| Deployment | Cloud |
| Platforms | Web |
| Compliance & security | GDPR |
| Support | Email, Docs, Tickets |
| Built for | Solo, Small business, Mid-market (editorial estimate) |
| Pricing | Free plan · paid from $75/user/mo (annual) · 5-day trial (source) |
| Website | oneplan.io |
| Facts checked | 21 Sep 2026 |
Alternatives to OnePlan
- EventDiagramA broad event-planning workspace with 2D, 3D, imports, approvals, and AI assistance.9.8
- 3D Event DesignerA broad event-planning workspace for visual layouts, seating, inventory, and collaboration.8.6
- Metis Room PlannerA detailed browser-based planner for teams that need precise layouts, seating and handover outputs.8.5
See all OnePlan alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026
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