Design and diagrams decision
Lucidspark
A small, useful Lucidspark-like whiteboard (basic canvas, persistence, sharing, realtime) is realistic for a single developer; the full product—with deep integrations, enterprise security, AI features, and global scale—is not practical to replicate quickly.
Visit website↗Open-source builds that already do this
Every project below is open source and already does this job today. Fork one, self-host it, or take the parts you need — the build prompt further down assumes an empty file, and this is the shortcut past that. Licences differ; check the one on each card before you ship.
What a replacement has to do
- Create a shared canvas, add and edit shapes/sticky notes, persist boards, and export/share artifacts.
What it still won’t have
- Hundreds of built-in integrations and marketplace
- Enterprise-grade security, compliance, and admin controls
- Scale and reliability for tens of millions of users
- Advanced AI-powered features and templates
- Vendor support, training, and professional services
What remains hard
- Integration maintenance
With more than 100 custom-built integrations (and counting), Lucid works seamlessly with the apps you already use.
- Brand trust
100M+ individual users
- Execution quality
We made the most intelligent, complete, and connected platform for work acceleration and visual collaboration—but our customers made it the most used.
First-year cost
No published price
Lucidspark does not publish a price we could read, so there is nothing to compare against. What building costs is below.
Money you would actually spend
Time you would spend
—
What you would spend
What we assumed
The verdict above measures whether you could build it. This one is only about money.
Runnable build prompt
Build a minimal collaborative whiteboard app using React for the frontend, Node.js/Express for the backend, Postgres for persistence, and Redis for realtime pub/sub. Implement: (1) a pan/zoom canvas with basic shapes and sticky notes (SVG or Canvas); (2) board CRUD saved in Postgres and asset storage (S3-compatible); (3) realtime sync using WebSockets backed by Redis channels and presence indicators; (4) authentication (email or OAuth) and shareable link-based permissions (viewer/editor); (5) export to PNG/PDF and import of images. Out of scope: enterprise SSO integrations, advanced AI features, multi-region scaling. Include input validation, error handling, unit tests for backend APIs, and end-to-end tests for core flows.
How we checked
How the score was reached
- Partly verdict base52
- An open-source build was found+5
- 4 cited sources+3
- 3/3 assessment runs agreed+4
- Evidence score64
The base comes from the verdict. Everything under it is a check that either happened or did not, and each one is a fact frozen in this record rather than a judgement made at render time — so the same evidence always produces the same number.
How scoring works →Cited sources · 4
Every page the run actually retrieved.
- official productLucid homepage
- official pricingCloud Accelerator (pricing/overview)
- official docsLucid for Product and UX
- open sourcelovasoa/whitebophir
Integrity checks
What held up, and what did not.
