Mailmunch vs SmtpJS
Head-to-head usage across the sites we track.
Top sites by authority
Mailmunch · 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+
23
6
Open Page Rank 7+
64
7
Open Page Rank 6+
107
7
Open Page Rank 5+
227
9
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Mailmunch · SmtpJS · share of sites in each country using one or the other
United States
7,677
81
United Kingdom
1,866
43
Canada
1,624
39
India
1,169
263
Australia
1,075
29
France
768
43
Brazil
679
65
Germany
686
42
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Mailmunch | SmtpJS |
|---|---|---|
| LCP | 1.7 s | 2.4 s |
| INP | 50 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.