Amazon SES vs SmtpJS
Head-to-head usage across the sites we track.
Top sites by authority
Amazon SES · SmtpJS · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
68
4
Open Page Rank 8+
1,210
6
Open Page Rank 7+
5,141
7
Open Page Rank 6+
9,940
7
Open Page Rank 5+
16,692
9
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Amazon SES · SmtpJS · share of sites in each country using one or the other
United States
67,827
81
United Kingdom
30,161
43
India
29,401
263
Canada
23,344
39
Germany
23,317
42
Brazil
21,901
65
France
19,422
43
Australia
18,824
29
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Amazon SES | SmtpJS |
|---|---|---|
| LCP | 1.8 s | 2.4 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 700 ms | 850 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.