Diagramming tools
Tools for flowcharts, technical diagrams, and visual modeling.
Excalidraw
Diagramming
Whitebophir
Diagramming
Umlet
Diagramming
Openflowkit
Diagramming
Drafft-ink
Diagramming
Whiteboard
Diagramming
How to choose open-source Diagramming software
Start with the workflow you need to replace, then compare feature coverage, deployment documentation, project activity, data portability, and support. Repository popularity is useful context, but it should not outweigh fit or the project's maintenance history.
Capabilities and use cases
Across the reviewed tools, common documented capabilities include Collaborative whiteboard canvases from ideation to aligned workshop board, Real-time canvas collaboration, Collaborative implementation diagrams, Infinite canvas boards, Collaborative virtual whiteboards, Diagram and visual-model creation, Flowcharts, Lifecycle diagram creation for documented systems and processes. Verify the exact workflow on each profile before migrating production data.
Licensing considerations
Licenses represented in this category include AGPL-3.0, GPL-3.0, MIT. Check redistribution, modification, and hosted-service obligations against your intended use.
Self-hosting tradeoffs
6 of 6 reviewed tools are confirmed as self-hostable, and 2 document Docker support. Compare upgrade, backup, monitoring, and security work alongside hosting cost.