Klaviyo vs Systeme.io
Head-to-head usage across the sites we track.
Top sites by authority
Klaviyo · Systeme.io · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
20
2
Open Page Rank 8+
123
4
Open Page Rank 7+
473
4
Open Page Rank 6+
1,250
4
Open Page Rank 5+
3,055
4
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Klaviyo · Systeme.io · share of sites in each country using one or the other
United States
94,562
81
United Kingdom
37,244
17
Canada
29,978
18
Australia
27,541
16
Germany
24,145
15
France
21,230
107
India
20,024
58
Spain
16,028
22
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Klaviyo | Systeme.io |
|---|---|---|
| LCP | 1.6 s | 2.4 s |
| INP | 100 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 500 ms | 1000 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.