Klaviyo vs ManyContacts
Head-to-head usage across the sites we track.
Top sites by authority
Klaviyo · ManyContacts · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
20
1
Open Page Rank 8+
123
1
Open Page Rank 7+
473
1
Open Page Rank 6+
1,250
1
Open Page Rank 5+
3,055
1
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Klaviyo · ManyContacts · share of sites in each country using one or the other
United States
94,562
7
United Kingdom
37,244
5
Canada
29,978
3
Australia
27,541
3
Germany
24,145
1
France
21,230
5
India
20,024
8
Spain
16,028
19
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Klaviyo | ManyContacts |
|---|---|---|
| LCP | 1.6 s | 2.3 s |
| INP | 100 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 500 ms | 950 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.