Sendinblue vs Systeme.io
Head-to-head usage across the sites we track.
Top sites by authority
Sendinblue · Systeme.io · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
14
3
Open Page Rank 8+
263
5
Open Page Rank 7+
1,127
6
Open Page Rank 6+
2,466
6
Open Page Rank 5+
4,672
6
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Sendinblue · Systeme.io · share of sites in each country using one or the other
France
30,954
134
United States
22,537
74
Germany
16,656
20
Italy
15,681
30
United Kingdom
13,949
15
Spain
11,748
28
India
11,543
49
Netherlands
9,324
12
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Sendinblue | Systeme.io |
|---|---|---|
| LCP | 2 s | 2.5 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 900 ms | 1000 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.