Design and diagrams

Excalidraw+ alternatives

2 open-source projects that already do this job. Free to use - not free to run, which is what the numbers on the right are for.

The full assessment →

The projects

lovasoa/whitebophir2,627AGPL-3.0Web-based collaborative whiteboard with real-time drawing and easy deployment.Open on GitHub spacedeck/spacedeck-open1,132AGPL-3.0Real-time collaborative web whiteboard supporting rich media and multi-user drawing.Open on GitHub

What you give up either way

enterprise features (teams management, access controls)
cloud-hosted backups and server-side syncing at scale
read-only embeds/managed sharing and workspace collections
voice hangouts & screensharing integrated in product
extended AI features and MCP integrations provided by vendor

An open-source project doing the core job proves a replacement is possible. It does not prove it matches Excalidraw+, and it does not prove anyone has run it for a month. How we decide.