Graphviz

Classic open-source graph visualization software that lays out diagrams written in the DOT language.

More in Diagrams & Whiteboards

Excalidraw

Open-source virtual whiteboard for hand-drawn style diagrams, with an embeddable React component and a JSON scene format.

tldraw SDK

Infinite canvas SDK for React used to build whiteboards, diagram editors and AI canvas apps.

draw.io

Free diagramming app for flowcharts, network and UML diagrams that runs in the browser or desktop, with an embed mode for integrations.

PlantUML

Diagram-as-code tool that renders UML, sequence, component, Gantt and other diagrams from a plain-text language.

Information is summarised in our own words and may be out of date; check the vendor's site for current terms and prices. Not affiliated with Graphviz. Suggest a correction.

Category	Diagrams & Whiteboards
Authentication	No auth
Pricing	Free
Source	Open Source
Website	https://graphviz.org/
Docs	https://graphviz.org/documentation/
Last checked	2026-10-14
As JSON	/api/v1/directory/graphviz.json