A multiplayer vector canvas that stays in sync at 60fps across a design team is one of the hardest things shipped on the web this decade. This is what moats look like.
VIBE SCORE 68/100
The parts this build actually needs, each rated on its own — the average is the Vibe Score above.
| Landing page | 99 |
| Realtime collaboration | 67 |
| User login | 92 |
| Custom canvas/rendering engine | 15 |
Don't feel like building it? These are already made, open-source, and free.
Just pay. A multiplayer vector canvas that stays in sync at 60fps across a design team is one of the hardest things shipped on the web this decade. This is what moats look like.
Figma costs $20/mo (about $240/yr) as of 2026-08. That's what a working rebuild would save you.
If you're not collaborating, free tiers and open-source editors (for vectors, for wireframes) may cover you at $0 — the honest alternative to building is checking whether you need the paid seat at all AI agents increasingly generate UI straight to code, which quietly shrinks how much canvas time some workflows need
Yes — Penpot, Excalidraw are open-source options worth trying before you build your own. Details are in the standard parts section on this sheet.