Mailjet vs SmtpJS
Head-to-head usage across the sites we track.
Top sites by authority
Mailjet · SmtpJS · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
9
4
Open Page Rank 8+
248
6
Open Page Rank 7+
1,352
7
Open Page Rank 6+
3,227
7
Open Page Rank 5+
6,288
8
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Mailjet · SmtpJS · share of sites in each country using one or the other
France
36,029
41
Germany
16,250
39
United States
14,983
86
United Kingdom
10,778
46
Spain
10,641
41
Belgium
9,984
20
Netherlands
9,364
26
Italy
8,631
37
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Mailjet | SmtpJS |
|---|---|---|
| LCP | 1.8 s | 2.4 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 700 ms | 800 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.