Constant Contact vs Sendinblue
Head-to-head usage across the sites we track.
Top sites by authority
Constant Contact · Sendinblue · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Constant Contact · Sendinblue · share of sites in each country using one or the other
United States
26,811
22,537
France
532
30,954
Germany
532
16,656
Italy
421
15,681
United Kingdom
1,472
13,949
India
1,648
11,543
Spain
473
11,748
Canada
3,324
8,723
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Constant Contact | Sendinblue |
|---|---|---|
| LCP | 1.7 s | 2 s |
| INP | 50 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 700 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.
Sites that switched
Domains that dropped one technology and adopted the other within about a year, data nobody else gives away free.
Constant Contact to Sendinblue
| Domain | When |
|---|---|
| crisisdogsnc.org | Apr 2026 |
| bayportyc.com | Jan 2026 |
| wyeheritage.ca | Jan 2026 |