BySide vs Klaviyo
Head-to-head usage across the sites we track.
Top sites by authority
BySide · Klaviyo · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
1
20
Open Page Rank 8+
1
117
Open Page Rank 7+
6
471
Open Page Rank 6+
13
1,263
Open Page Rank 5+
19
3,084
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
BySide · Klaviyo · share of sites in each country using one or the other
United States
28
94,628
United Kingdom
29
37,132
Canada
17
29,501
Australia
9
27,110
Germany
28
23,957
France
35
20,942
India
19
19,705
Spain
54
16,472
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | BySide | Klaviyo |
|---|---|---|
| LCP | 2.3 s | 1.6 s |
| INP | 150 ms | 100 ms |
| CLS | 0 | 0 |
| TTFB | 700 ms | 500 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.