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+
13
2
Open Page Rank 8+
250
4
Open Page Rank 7+
1,100
4
Open Page Rank 6+
2,435
4
Open Page Rank 5+
4,621
4
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
25,958
107
United States
19,918
81
Germany
14,883
15
Italy
13,878
27
United Kingdom
12,372
17
Spain
10,428
22
India
10,203
58
Netherlands
8,237
13
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Sendinblue | Systeme.io |
|---|---|---|
| LCP | 2 s | 2.4 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 900 ms | 1000 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.