Best open source diagramming tools
Open source diagramming tools compared. Self-hostable, transparent, and community-driven options.
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1
JavaScript-based diagramming tool that renders diagrams from text definitions.
2
Free, open-source diagramming tool that works in the browser with no account needed.
3
Open-source collaborative whiteboard with a friendly interface and embeddable SDK.
More diagramming lists
Comparisons
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Mermaid vs Lucidchart
Mermaid gives you open source and self-hosting; Lucidchart is a managed service. Which trade-off works for you?
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Mermaid vs Draw.io (diagrams.net)
Mermaid is built for developers wanting text-based diagrams in markdown. Draw.io (diagrams.net) is built for anyone wanting free, full-featured diagramming. Pick the one that fits.
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Mermaid vs tldraw
Mermaid is built for developers wanting text-based diagrams in markdown. tldraw is built for developers wanting an embeddable whiteboard canvas. Pick the one that fits.
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Mermaid vs FigJam
Mermaid gives you open source and self-hosting; FigJam is a managed service. Which trade-off works for you?
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Mermaid vs Eraser
Mermaid gives you open source and self-hosting; Eraser is a managed service. Which trade-off works for you?
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Mermaid vs Eraser
Mermaid gives you open source and self-hosting; Eraser is a managed service. Which trade-off works for you?
Stay sharp
New diagramming tools, price changes, and honest takes — weekly.