diagram-design vs FloorGen: Features, Pricing & Which Is Better (2026)
A side-by-side comparison of diagram-design and FloorGen — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.
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diagram-design
Cathryn Lavery
Open-source agent skill that draws editorial diagrams as a single self-contained HTML and SVG file, in your brand's style.
Key features
- 45 Diagram Types: Architecture, quadrant, sequence and many other diagram types chosen by the agent from a plain-language request.
- Self-Contained Output: Each diagram is one HTML file with inline SVG that opens with a double-click and needs no build step.
- Brand Onboarding: Point it at a website and it pulls your palette and fonts so every later diagram matches.
- Import From Other Tools: Convert existing draw.io, Mermaid or Excalidraw diagrams into the editorial style.
- Export to PNG and SVG: Export commands produce images for docs and slides.
- Cross-Agent Support: Installs into Cursor, Claude Code, Codex, GitHub Copilot, Gemini CLI, Cline, Windsurf and Amp via the skills CLI.
Best for
- Architecture Documentation: Generating a frontend, backend, database and cache diagram for a README or design doc.
- Project Prioritisation: Drawing an impact versus effort quadrant of upcoming projects.
- API Flow Explanation: Producing a sequence diagram of a token refresh on 401 for developer docs.
- Brand-Consistent Visuals: Keeping all technical diagrams in the company's colours and fonts.
- Migrating Old Diagrams: Restyling Mermaid or draw.io diagrams into a cleaner editorial look.
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FloorGen
FloorGen
A free browser-based floor plan maker with an AI that drafts plans from text, 3D walkthroughs and PDF/DXF export.
Key features
- AI Plan Generation: Describe a house, ADU or room and get an editable plan drawn for you.
- Trace From Image: Import a photo or PDF, set scale with two points and accept the suggested walls.
- 3D and Video Walkthroughs: Walk through the plan in 3D and export walkthrough video in 16:9, 9:16 or 1:1.
- Furniture Library: Furnish with about 3,000 models and give each wall its own finish.
- Export Options: PDF print sets from Letter to ARCH D or A1 with title block, DXF (R12) and view-only HTML.
- MCP Integration: 151 tools let Claude, ChatGPT, Cursor and other MCP clients read and change the real drawing.
- Code Checks and Budgets: Numbered plan checks plus room areas in ft² or m² and budgets for finishes.
Best for
- Home Layout Planning: Try furniture arrangements before moving anything.
- Renovation Briefs: Hand a contractor a to-scale drawing for a kitchen, bath or ADU.
- Listing Floor Plans: Trace plans from photos for real estate listings and quotes.
- Client Walkthroughs: Share 3D views or videos with clients as an interior designer.
- AI-assisted Drafting: Let an MCP-connected assistant edit the plan directly.