Boxes, connecting lines, and auto-routing between them is a more bounded problem than free-form design canvases like Figma — it's structured diagramming, not open-ended creativity, which makes it a genuinely reasonable weekend build.
VIBE SCORE 70/100
The parts this build actually needs, each rated on its own — the average is the Vibe Score above.
| Landing page | 99 |
| CRUD database | 95 |
| Custom canvas/rendering engine | 15 |
Don't feel like building it? These are already made, open-source, and free.
Borderline. Boxes, connecting lines, and auto-routing between them is a more bounded problem than free-form design canvases like Figma — it's structured diagramming, not open-ended creativity, which makes it a genuinely reasonable weekend build.
Lucidchart costs $9/mo (about $108/yr) as of 2026-08. That's what a working rebuild would save you.
Real-time multi-cursor collaborative editing adds meaningful complexity beyond solo diagramming Deep integrations (auto-generate an org chart from your HR system, a network diagram from your AWS account) are real per-integration work Their shape libraries for specific standards (UML, ERD, electrical) represent real domain research to reproduce fully
Yes — draw.io / diagrams.net, Excalidraw are open-source options worth trying before you build your own. Details are in the standard parts section on this page.