The Bias Index
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Mermaid Chart

  • mermaid.ai
  • 96th of 98 by total
  • Read on 30 October 2026

A typical compare page from Mermaid Chart raises 2.3 of our five red flags.

We found 5 candidate pages on Mermaid Chart’s website, of which 3 are compare pages. Those are the ones we score.

Together they add up to 7 red flags, the 96th most of the 98 companies we rank.

7red flags in total
2.3red flags per page
3compare pages
5 candidate pages →
0Wins on everything 3Never says when to pick the rival 1Admits no weakness 0Vague attacks 3Rival gets more criticism

Mermaid Chart against everyone

Left to right: red flags per page. Bottom to top: compare pages, on a log scale. Bigger dots have more red flags in total. Every grey dot is another company.

Fair players1 flag per page or fewer
0
10
100
1,000
0
1
2
3
4
5
1,000 flags100 flags compare pages
flags per page, out of five

All 3 pages

A filled dot is a red flag. Open a page to read it yourself.

Mermaid vs. Whimsical
mermaid.ai/comparison/mermaid-vs-whimsical/
3
Mermaid vs. Draw.io
mermaid.ai/comparison/mermaid-vs-draw-io/
2
Mermaid vs. PlantUML
mermaid.ai/comparison/mermaid-vs-plantuml/
2

Take the data with you

Every compare page we scored for Mermaid Chart, with its five answers, as JSON. The whole index is in the weekly release.

Think we got one wrong?

Open an issue on GitHub with the page and the question. The labeled pages we test against are public.