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+
1
15
Open Page Rank 8+
8
254
Open Page Rank 7+
42
1,096
Open Page Rank 6+
62
2,422
Open Page Rank 5+
91
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
Bluecore · Sendinblue · share of sites in each country using one or the other
France
168
27,194
United States
324
19,846
Germany
158
14,837
Italy
150
14,444
United Kingdom
203
12,352
Spain
151
10,837
India
251
10,040
Netherlands
144
8,273
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Bluecore | Sendinblue |
|---|---|---|
| LCP | 2.1 s | 2 s |
| INP | 150 ms | 75 ms |
| CLS | 0.05 | 0 |
| TTFB | 800 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.