Klaviyo vs Sailthru
Head-to-head usage across the sites we track.
Top sites by authority
Klaviyo · Sailthru · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
20
13
Open Page Rank 8+
123
153
Open Page Rank 7+
473
356
Open Page Rank 6+
1,250
522
Open Page Rank 5+
3,055
740
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Klaviyo · Sailthru · share of sites in each country using one or the other
United States
94,562
1,502
United Kingdom
37,244
942
Canada
29,978
1,055
Australia
27,541
689
Germany
24,145
607
France
21,230
541
India
20,024
887
Spain
16,028
563
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Klaviyo | Sailthru |
|---|---|---|
| LCP | 1.6 s | 2 s |
| INP | 100 ms | 125 ms |
| CLS | 0 | 0.05 |
| TTFB | 500 ms | 700 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.
Sailthru to Klaviyo
| Domain | When |
|---|---|
| yodeldirect.co.uk | Jul 2026 |
| kelya-beauty.store | Jul 2026 |