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+
22
6
Open Page Rank 7+
62
7
Open Page Rank 6+
108
7
Open Page Rank 5+
234
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
8,794
99
United Kingdom
2,158
47
Canada
1,929
44
India
1,343
313
Australia
1,222
39
France
957
48
Spain
818
41
Germany
783
51
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Mailmunch | SmtpJS |
|---|---|---|
| LCP | 1.7 s | 2.5 s |
| INP | 50 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 600 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.