Kartra vs Sendinblue
Head-to-head usage across the sites we track.
Top sites by authority
Kartra · Sendinblue · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
0
15
Open Page Rank 8+
0
254
Open Page Rank 7+
0
1,096
Open Page Rank 6+
0
2,422
Open Page Rank 5+
7
4,597
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Kartra · Sendinblue · share of sites in each country using one or the other
France
23
27,194
United States
330
19,846
Germany
28
14,837
Italy
60
14,444
United Kingdom
84
12,352
Spain
20
10,837
India
65
10,040
Netherlands
18
8,273
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Kartra | Sendinblue |
|---|---|---|
| LCP | 2.3 s | 2 s |
| INP | 75 ms | 75 ms |
| CLS | 0.05 | 0 |
| TTFB | 1100 ms | 1000 ms |
Median site's p75 values from the Chrome UX Report, Sep 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.