CartKit vs Klaviyo
Head-to-head usage across the sites we track.
Top sites by authority
CartKit · Klaviyo · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
0
20
Open Page Rank 8+
0
123
Open Page Rank 7+
0
473
Open Page Rank 6+
0
1,250
Open Page Rank 5+
0
3,055
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
CartKit · Klaviyo · share of sites in each country using one or the other
United States
64
94,562
United Kingdom
33
37,244
Canada
20
29,978
Australia
16
27,541
Germany
19
24,145
France
18
21,230
India
17
20,024
Spain
16
16,028
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | CartKit | Klaviyo |
|---|---|---|
| LCP | 1.6 s | 1.6 s |
| INP | 100 ms | 100 ms |
| CLS | 0 | 0 |
| TTFB | 500 ms | 500 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.
CartKit to Klaviyo
| Domain | When |
|---|---|
| lillywigs.de | Apr 2026 |