Klaviyo vs Rockerbox
Head-to-head usage across the sites we track.
Top sites by authority
Klaviyo · Rockerbox · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
17
2
Open Page Rank 8+
117
11
Open Page Rank 7+
456
38
Open Page Rank 6+
1,239
69
Open Page Rank 5+
3,036
99
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Klaviyo · Rockerbox · share of sites in each country using one or the other
United States
103,547
367
United Kingdom
40,783
230
Canada
33,265
262
Australia
30,331
181
Germany
26,133
152
France
23,908
154
India
22,437
254
Spain
16,738
141
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Klaviyo | Rockerbox |
|---|---|---|
| LCP | 1.6 s | 2 s |
| INP | 100 ms | 125 ms |
| CLS | 0 | 0 |
| TTFB | 500 ms | 700 ms |
Median site's p75 values from the Chrome UX Report, Jun 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.