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
1
Open Page Rank 8+
250
2
Open Page Rank 7+
1,096
2
Open Page Rank 6+
2,422
2
Open Page Rank 5+
4,593
2
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
27,194
118
United States
19,846
75
Germany
14,837
17
Italy
14,444
33
United Kingdom
12,352
17
Spain
10,837
29
India
10,040
54
Netherlands
8,273
12
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Sendinblue | Systeme.io |
|---|---|---|
| LCP | 2 s | 2.3 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 1000 ms | 900 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.