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
23,768
19,918
France
390
25,958
Germany
445
14,883
Italy
336
13,878
United Kingdom
1,265
12,372
India
1,474
10,203
Spain
362
10,428
Canada
2,891
7,431
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 | 800 ms | 900 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.
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 |