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EventDiagram
Phoenix, Arizona, USA
What it is
EventDiagram is a web application for creating, sharing, and collaborating on event floor plans and diagrams. Plans use real-world dimensions, and capacity, spacing, and square feet per seat change as objects move. Its 3D view is built from the same scene as the 2D plan and represents objects at their real heights. The AI copilot can create or edit a to-scale layout from plain-language requests, with proposed changes available for review and approval. An MCP server and API keys let Claude or other AI tools read and write diagrams. Share-link recipients can view plans in 3D, leave pinned comments, and approve a specific version without an account. Seating tools support guest-list imports, table assignments, meal and dietary tracking, and attendee check-in. PDF, image, and data exports are available on every plan, though Free exports have a watermark. The product has a free plan and paid plans listed from $9/mo. EventDiagram states it is not SOC 2 certified today.
For and against
For
- Plans use real-world dimensions and update capacity as objects move.
- 3D view represents objects at their real heights.
- Share links allow comments and version approval without an account.
- Seating tools include guest imports and attendee check-in.
- Exports are available on every plan.
Against
- Free exports carry a watermark.
- Free plan allows one active diagram.
- Free plan includes three AI copilot messages per month.
- EventDiagram is not SOC 2 certified today.
The verdict
EventDiagram combines dimensioned floor plans, 3D viewing, seating tools, and collaboration features for event work. The free plan is limited to one active diagram and watermarked exports, and the maker states it is not SOC 2 certified today.
Who it suits
It suits venues and event teams that create floor plans and coordinate seating, including planners, caterers, rental companies, and AV and production teams. It can also suit collaborators who need to review or approve a diagram through a share link without an account.
Plans and prices
Free
1 active diagram · 3 AI copilot messages/month · unlimited viewers/commenters · core object library
Read 15 Oct 2026 · eventdiagram.com
Solo
1 editor · unlimited events/diagrams · standard library · watermark-free exports
Read 15 Oct 2026 · eventdiagram.com
Pro
Up to 3 editors · 75 AI messages/month · 3D view · production library
Read 15 Oct 2026 · eventdiagram.com
Event Pass
Full library · clean exports · 3D · valid for 90 days
Read 15 Oct 2026 · eventdiagram.com
Small Venue
Up to 3 event spaces · 1 converted space · unlimited team · own inventory
Read 15 Oct 2026 · eventdiagram.com
Drawn for your event
Team draws one event space from your supplied plan · plan for 90 days
Read 15 Oct 2026 · eventdiagram.com
Business
Unlimited members · 1 converted property · own inventory · 150 AI messages/month
Read 15 Oct 2026 · eventdiagram.com
Venue
Up to 10 event spaces · up to 5 converted spaces · unlimited team · 300 AI messages/month
Read 15 Oct 2026 · eventdiagram.com
Venue Group / Enterprise
Multi-property hierarchy · SSO/SCIM · audit logs · API
Read 29 Sep 2026 · eventdiagram.com
On the record
- 3D walkthrough
- The product renders a 3D view from the same scene as the 2D diagram, using real object heights.eventdiagram.com · read 15 Oct 2026
- AI copilot
- The copilot accepts plain-language layout requests, creates a draft for review and runs on Claude.eventdiagram.com · read 15 Oct 2026
- AI data handling
- The maker says private content and copilot prompts are not used to train AI models; the diagram being worked on is processed by Anthropic to fulfill a copilot request.eventdiagram.com · read 29 Sep 2026
- Airwall modeling
- A divisible ballroom can be defined once and its section combinations and capacities derived automatically.eventdiagram.com · read 15 Oct 2026
- API and MCP
- EventDiagram provides API keys and a remote MCP server that can let Claude or other AI clients read and write diagrams.app.eventdiagram.com · read 15 Oct 2026
- Company stage
- The security page describes EventDiagram as an early-stage product built by a small Phoenix team.eventdiagram.com · read 15 Oct 2026
- Compliance disclaimer
- Terms state that capacity and spacing outputs are planning aids and are not fire-code, accessibility or structural certifications.eventdiagram.com · read 15 Oct 2026
- Compliance limit
- EventDiagram states that it is not SOC 2 certified today.eventdiagram.com · read 29 Sep 2026
- Current integrations
- The currently documented external connection is MCP/API; HoneyBook, CRM, calendar, webhook and automation integrations are listed as future work.eventdiagram.com · read 15 Oct 2026
- Data ownership
- Terms say customer diagrams, floor plans and guest lists remain customer content and can be exported at any time.eventdiagram.com · read 15 Oct 2026
- Data processors
- The privacy policy names DigitalOcean, Resend, Stripe, Anthropic, Sentry, Cloudflare and Google Workspace as processors or service providers.eventdiagram.com · read 15 Oct 2026
- Documentation
- The help site lists 26 articles and a 21-lesson course totaling about 32 minutes, using recordings of the product.eventdiagram.com · read 15 Oct 2026
- Exports
- PDF, image and data exports are available on every plan; Free exports contain a watermark.eventdiagram.com · read 15 Oct 2026
- Exports and data portability
- PDF, image, and data exports are available on every plan, including Free, with a watermark on Free exports.eventdiagram.com · read 29 Sep 2026
- Import limitation
- An importer exists for Social Tables, Prismm and AllSeated files, but reliable self-serve import for every export is still under development.eventdiagram.com · read 15 Oct 2026
- Independent feature praise
- Centric Events selected EventDiagram as its best overall option, highlighting unlimited free collaborators on every tier.centric.events · read 15 Oct 2026
- Infrastructure
- The application and database run on managed cloud infrastructure with encrypted backups and monitoring.eventdiagram.com · read 15 Oct 2026
- Integrations
- EventDiagram provides an MCP server and API keys so users’ Claude or other AI tools can read and write diagrams.eventdiagram.com · read 29 Sep 2026
