Bluecore vs Sendinblue
Head-to-head usage across the sites we track.
Top sites by authority
Bluecore · Sendinblue · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
2
14
Open Page Rank 8+
9
263
Open Page Rank 7+
47
1,127
Open Page Rank 6+
70
2,466
Open Page Rank 5+
103
4,672
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Bluecore · Sendinblue · share of sites in each country using one or the other
France
201
30,954
United States
372
22,537
Germany
186
16,656
Italy
174
15,681
United Kingdom
238
13,949
Spain
170
11,748
India
286
11,543
Netherlands
182
9,324
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Bluecore | Sendinblue |
|---|---|---|
| LCP | 2.3 s | 2 s |
| INP | 137 ms | 75 ms |
| CLS | 0.05 | 0 |
| TTFB | 800 ms | 900 ms |
Median site's p75 values from the Chrome UX Report, Jun 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.