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+
69
4
Open Page Rank 8+
1,198
6
Open Page Rank 7+
5,105
7
Open Page Rank 6+
9,862
7
Open Page Rank 5+
16,562
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
73,087
99
United Kingdom
33,442
47
India
31,925
313
Canada
25,903
44
Germany
25,618
51
France
22,597
48
Brazil
22,273
67
Spain
20,719
41
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Amazon SES | SmtpJS |
|---|---|---|
| LCP | 1.8 s | 2.5 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 700 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.