Miro's Free plan lets you edit only three boards at a time and turns older ones view-only, Starter bills $8 per member per month on annual billing, and SSO with unlimited guests requires Business at $20 per member per month. A team sketching architecture diagrams hits that board cap long before it needs any of the paid collaboration features. Running Excalidraw's excalidraw-room WebSocket container, or the Nextcloud Whiteboard backend with JWT-signed sessions and Redis Streams scaling, keeps live cursors on your own reverse proxy. draw.io's ?offline=1 flag disables every cloud storage integration, and WBO's JWT roles let you give moderators a board-wipe tool without a billing tier.
| Name | Main Category | Sub-Category | Target Alternative | Free Tier Summary | Self-Hostable? | Short Description | Primary Link |
|---|---|---|---|---|---|---|---|
draw.io | Project Management & Developer Workspaces | Diagramming & Flowcharts | Lucidchart / Miro Diagrams | 100% Free - Apache-2.0 source, self-hosted via the official jgraph/drawio image | Yes - Docker | Stateless single-container editor for flowcharts, UML, ER, network, and BPMN diagrams with no database dependency. Append ?offline=1 to disable cloud storage integrations on air-gapped networks. | |
WBO | Project Management & Developer Workspaces | Lightweight Real-Time Whiteboard | Miro / Microsoft Whiteboard | 100% Free - Self-Hosted (AGPL-3.0) | Yes - Docker | Node.js whiteboard where anyone with a board URL can draw simultaneously. The official lovasoa/wbo image persists boards to a mounted volume, and JWT authentication with moderator roles controls who can edit or wipe a board. | |
AFFiNE | Project Management & Developer Workspaces | Docs + Edgeless Canvas Workspace | Miro / FigJam / Notion | Free self-hosting up to 10 seats per workspace - editor is MIT, backend is source-available (AFFiNE Enterprise Edition license) - Team plan is $10/seat/month beyond 10 seats | Yes - Docker | Every page switches between a document and an Edgeless infinite canvas, so brainstorm boards and specs live in one workspace. Run the full stack from Docker and configure OIDC sign-in from the admin panel. | |
Excalidraw | Project Management & Developer Workspaces | Collaborative Whiteboard | Miro / FigJam | 100% Free - MIT License (live collaboration needs the separate excalidraw-room container) | Yes - Docker | Hand-drawn style virtual whiteboard published as an official Docker image. Pair it with excalidraw-room for live multiplayer cursors over WebSockets, and keep scenes as plain JSON files you can commit to Git. | |
Nextcloud Whiteboard | Project Management & Developer Workspaces | Whiteboard Inside a File Platform | Miro / FigJam | 100% Free - AGPL-3.0 (requires an existing Nextcloud instance) | Yes - Docker | Infinite canvas built into Nextcloud that stores whiteboard files alongside your other documents. A standalone WebSocket server handles live sessions, signed with a JWT secret shared with Nextcloud and scaled with Redis Streams. |
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