Mermaid vs PlantUML: which does AI recommend?

· ChatGPT Search and Google AI Mode

Based on every AI answer that names bothReviewed by

How we measure

AI summary

tends to suit ease of use, while answers naming both usually list first.

Listed first when AI names both

MermaidMermaid: 83% (Mermaid leads)PlantUMLPlantUML: 17%

Recommended when named

MermaidMermaid: 82% (Mermaid leads)
PlantUMLPlantUML: 68%

Pick Mermaid for

  • Code-based diagrams Almost always
  • System architecture mapping Usually
  • Online system diagrams Almost always

Topic by topic

Mentioned in, as a share of each topic’s answers

Mermaid named more5Within 2 points2PlantUML named more1

Mermaid named more

PlantUML named more

Within 2 points2

Only Mermaid is ranked in2

Only PlantUML is ranked in1

What people ask AI about Mermaid and PlantUML

Mermaid listed firstPlantUML listed first
  1. I need a diagramming tool that creates code-based diagrams (text-to-diagram) and does not rely on mouse dragging.Mermaid almost always first
  2. As a Solutions Architect, what is the best software for creating detailed, professional-looking architecture diagrams?Leans Mermaid
  3. What's the best diagramming tool for a software engineer to map out complex system architecture?Mermaid usually first
  4. What is the best online diagramming tool for creating system architecture diagrams, flowcharts, and sequence diagrams?Mermaid almost always first
  5. We use a wiki software. Who offers a diagramming tool that embeds live diagrams into pages?Mermaid usually first
  6. I need to create an architecture diagram. What's an AI tool that can generate a C4 model or a sequence diagram from a description of the system's components?Mermaid almost always first
  7. As a cloud engineer, what is the best tool for visualizing and documenting our cloud architecture?Mermaid usually first

Who AI mentions first

Mermaid listed firstPlantUML listed first

is listed first every month.

  1. JunMermaid listed first: 82%PlantUML listed first: 18%
  2. JulMermaid listed first: 74%PlantUML listed first: 26%
  3. AugMermaid listed first: 96%PlantUML listed first: 4%
  4. SepMermaid listed first: 85%PlantUML listed first: 15%

Google AI Mode and ChatGPT Search usually list first when answers name both; ChatGPT Search leans more.

  • Google AI ModeMermaid listed first: 79%PlantUML listed first: 21%
  • ChatGPT SearchMermaid listed first: 88%PlantUML listed first: 12%

Sources cited in the comparisons

Mermaid favouredNeither favouredPlantUML favoured

Also named alongside Mermaid and PlantUML

  1. Diagrams.net69%
  2. Lucidchart61%
  3. Structurizr44%
  4. Miro38%
  5. Excalidraw28%
  6. IcePanel21%
  7. Microsoft Visio19%
  8. D219%
  9. Graphviz17%
  10. Eraser15%
  11. Mingrammer Diagrams14%
  12. Terrastruct11%

Mermaid vs PlantUML: common questions

Is Mermaid better than PlantUML?
Mermaid tends to suit ease of use, while answers naming both usually list Mermaid first.
Do ChatGPT and Google AI Mode recommend Mermaid or PlantUML?
Google AI Mode and ChatGPT Search usually list Mermaid first when answers name both; ChatGPT Search leans more.
What are the alternatives to Mermaid and PlantUML?
AI most often names Diagrams.net, Lucidchart, Structurizr and Miro in the same answers.
When is Mermaid the better pick?
AI usually lists Mermaid first for: Code-based diagrams; System architecture mapping; Online system diagrams.

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