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+
8
4
Open Page Rank 8+
262
6
Open Page Rank 7+
1,387
7
Open Page Rank 6+
3,259
7
Open Page Rank 5+
6,301
9
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
40,812
48
Germany
17,951
51
United States
16,576
99
United Kingdom
11,969
47
Spain
11,483
41
Belgium
11,262
24
Netherlands
10,451
32
Italy
9,329
44
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Mailjet | SmtpJS |
|---|---|---|
| LCP | 1.8 s | 2.5 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 800 ms | 900 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.