Chart.js vs Mermaid
Head-to-head usage across the sites we track.
Top sites by authority
Chart.js · Mermaid · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
48
9
Open Page Rank 8+
883
45
Open Page Rank 7+
3,106
88
Open Page Rank 6+
5,438
110
Open Page Rank 5+
8,607
140
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Chart.js · Mermaid · share of sites in each country using one or the other
United States
48,182
392
India
25,375
290
Germany
21,390
213
Italy
19,374
161
United Kingdom
18,271
192
Brazil
18,003
203
Spain
17,614
153
France
17,096
171
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Chart.js | Mermaid |
|---|---|---|
| LCP | 2.2 s | 1.9 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 1000 ms | 700 ms |
Median site's p75 values from the Chrome UX Report, Aug 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.
Sites that switched
Domains that dropped one technology and adopted the other within about a year, data nobody else gives away free.
Chart.js to Mermaid
| Domain | When |
|---|---|
| earnmorecashtoday.com | Jul 2026 |
| unitepc.edu.bo | Jun 2026 |
Mermaid to Chart.js
| Domain | When |
|---|---|
| earnmorecashtoday.com | Jul 2026 |
| northstarbadcharts.com | May 2026 |