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+
51
10
Open Page Rank 8+
858
47
Open Page Rank 7+
2,989
88
Open Page Rank 6+
5,233
109
Open Page Rank 5+
8,295
141
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
47,410
397
India
24,979
296
Germany
21,175
213
Italy
20,268
178
Spain
18,944
162
United Kingdom
18,448
196
Brazil
17,645
196
France
17,424
179
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, Sep 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 |