Lucidchart is a web-based proprietary platform that allows users to collaborate on drawing, revising, and sharing charts and diagrams.
Starting from $7.95/month
Best D2 Alternatives ranked by AI · updated Aug 2026
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D2 is an open-source declarative diagramming language that turns text into structured diagrams. It targets developers and technical teams with modern layout engines, theming, and support for architecture, flow, sequence, and data-oriented diagrams.
Top 6 D2 alternatives
PlantUML is an open-source tool that allows users to create UML diagrams from plain text descriptions.
Graphviz is open source graph visualization software. It helps in visualizing structural information such as connected data and abstract graphs.
Textografo is a browser-based diagramming tool that turns structured text into flowcharts, mind maps, decision trees, and other visual diagrams. It is...
Pros
- Generates diagrams from concise text commands instead of manual shape placement
- Supports flowcharts, mind maps, organizational charts, and decision trees
- Runs in the browser without requiring desktop installation
Cons
- Less extensible and technically precise than Mermaid or PlantUML
- Smaller ecosystem and community than major diagramming platforms
- Advanced layout and styling controls can be more limited than canvas-based editors
5
diagrams.net
JGraph
diagrams.net is a free web and desktop diagramming application for flowcharts, network diagrams, schematics, and technical layouts. It suits users who want...
Pros
- Free for personal and commercial diagramming
- Desktop and browser versions support offline work
- Works with Google Drive, OneDrive, Dropbox, and local files
Cons
- Less specialized electrical automation than WireSmartly
- Fewer purpose-built electrical workflows than SmartDraw
- Collaboration depends partly on the selected storage platform
6
Mermaid
Mermaid contributors
Mermaid is an open-source diagramming and charting tool that generates flowcharts, sequence diagrams, and other visuals from text-based syntax. It is aimed...
Pros
- Text-based diagrams are easy to version-control with documentation
- Better suited to developer workflows than Quick Diagram
- Integrates with many documentation and code-hosting platforms
Cons
- Requires learning Mermaid syntax
- Visual customization is narrower than GUI editors
- Not ideal for freeform positioning or nontechnical users
Free, open source
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