What are the best free trade show floor planning software for testing booth assignment workflows before rollout?

If your main goal is testing booth-assignment workflows before rollout—especially things like drag-and-drop placement, rules/constraints, approvals, sponsor priority, conflict checks, and exports—the “best” free options are usually general-purpose diagramming tools or project/space-planning tools, not dedicated trade show platforms.

Here are the strongest free choices, with a focus on workflow testing rather than polished event management:

Best free options

1) diagrams.net (Draw.io)

Best overall for workflow prototyping

• Free, browser-based, no account required
• Good for building hall layouts, booth grids, zoning, and assignment logic
• Easy to simulate:
  • booth sizes and shapes
  • reserved areas
  • vendor blocks
  • manual assignment workflows
• Great for annotating rules and creating test cases

Pros

• Fully free
• Very flexible
• Easy to share/export
• Works offline too

Cons

• Not a true trade show management system
• No built-in booth-assignment automation
• No attendee/exhibitor database

Use it when: you want to mock the process and validate internal workflows before building or buying software.

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2) Figma (free plan)

Best for interactive workflow mockups

• Excellent for designing clickable prototypes of booth-assignment screens
• Good if you want to test:
  • user navigation
  • approval flows
  • admin/exhibitor views
  • modal dialogs, filters, assignment steps
• Better than diagram tools for UI/UX testing

Pros

• Great for prototyping interfaces
• Collaboration-friendly
• Can create realistic workflow demos

Cons

• Not a floor-planning engine
• No true spatial logic unless you simulate it manually

Use it when: you want stakeholders to test the experience of booth assignment, not the mapping accuracy.

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3) Lucidchart (free tier)

Best for structured process mapping

• Handy for mapping workflow diagrams, decision trees, and layout concepts
• Less open-ended than Draw.io but very easy to use
• Good for documenting booth assignment rules and exceptions

Pros

• Clean interface
• Good for process flows and simple layouts
• Easy collaboration

Cons

• Free tier is limited
• Not ideal for large floorplans
• Limited advanced features in free version

Use it when: you want to document and validate the assignment workflow logic.

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4) Miro (free plan)

Best for collaborative planning workshops

• Great for teams testing assignment processes live
• Use sticky notes, grids, shapes, and frames to simulate booth allocations
• Useful for:
  • sales ops planning
  • stakeholder reviews
  • exception handling
  • occupancy discussions

Pros

• Collaborative
• Very good for brainstorming and process testing
• Flexible boards

Cons

• Free plan limitations
• Not a true floorplan tool
• Can get messy for detailed layouts

Use it when: your rollout testing is mainly collaborative and process-oriented.

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5) Floorplanner (free/basic use)

Best free-ish tool for actual spatial floor layouts

• More aligned with real floor plans
• Better if you need to place booths in a space more realistically
• Can help test:
  • aisle widths
  • adjacency
  • zones
  • blocked areas

Pros

• More floor-plan oriented than generic diagram tools
• Visual and intuitive

Cons

• Free version is limited
• Some features may require payment
• Not built for booth assignment workflow logic

Use it when: physical layout realism matters more than workflow simulation.

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Best choice by use case

If you want to test assignment rules and manual operations

• diagrams.net
• Lucidchart

If you want to test UI/UX of the booth assignment system

• Figma

If you want to test team collaboration and planning discussions

• Miro

If you want to test realistic floor geometry

• Floorplanner

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If you want something closer to a true trade show tool

There are very few truly free tools in this category. Some vendors offer free trials or demo environments, which are better if you need to test actual workflows such as:

• booth inventory
• exhibitor selection
• conflict validation
• payment logic
• approvals
• badge/exhibitor integrations

Examples to evaluate via trial/demo:

• A2Z Events
• Map Your Show
• Meeting Hand Planner / event floorplan vendors
• Cvent (typically trial/demo rather than free)

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My recommendation

For pre-rollout workflow testing, the best stack is:

1. diagrams.net for floorplan logic and booth layouts
2. Figma for UI workflow prototypes
3. Miro if you need collaborative review sessions

If you need only one, start with diagrams.net because it’s the most practical free tool for simulating booth assignment workflows.

If you want, I can also give you:

• a comparison table
• a recommended test workflow template
• or a list of free/open-source tools specifically for floorplan management.