SmtpJS on new websites
Client-side JavaScript library for sending email via SMTP from the browser.
- Sites using SmtpJS
- 63
- since Apr 2026
- Last 30 days
- 0.0%
-
of new sites, to Oct 19
no change on the 30 days before - Last 7 days
- 0.0%
- of new sites, 7-day average
no change on the week before
| First seen | Apr 15, 2026 |
|---|---|
| Last seen | Oct 18, 2026 |
What we found
- SmtpJS appeared on 10 new sites in the last 30 days.[1]
- Six in ten new SmtpJS sites also use Font Awesome.
Share of new sites using SmtpJS
The line is the 7-day average share of new sites that use SmtpJS, since 10 September.
Who uses SmtpJS
| Type | Sites | Share | Bar |
|---|---|---|---|
| Developer Tools | 5 | 29.4% | |
| Health | 3 | 17.7% | |
| Education | 2 | 11.8% | |
| AI | 1 | 5.9% | |
| Content | 1 | 5.9% | |
| Finance | 1 | 5.9% | |
| Games | 1 | 5.9% | |
| Hiring & HR | 1 | 5.9% | |
| Marketing | 1 | 5.9% | |
| Social | 1 | 5.9% |
| Country | Sites | Share | Bar |
|---|---|---|---|
 India |
10 | 71.4% | |
 France |
2 | 14.3% | |
 UAE |
1 | 7.1% | |
 Australia |
1 | 7.1% |
| Ending | Sites | Share | Bar |
|---|---|---|---|
| .com | 20 | 31.8% | |
| .site | 10 | 15.9% | |
| .in | 9 | 14.3% | |
| .ai | 5 | 7.9% | |
| .tech | 3 | 4.8% | |
| .dev | 2 | 3.2% | |
| .fr | 2 | 3.2% | |
| .me | 2 | 3.2% | |
| .online | 2 | 3.2% | |
| .ae | 1 | 1.6% |
Transactional Email on new sites
| # | Movement | Tool | Share of category | Bar | |
|---|---|---|---|---|---|
| 1 | – |
Resend
|
58.3% | ||
| 2 | ▼1 |
SendGrid
|
7.1% | ||
| 3 | ▼2 |
Amazon SES
|
7.1% | ||
| 4 | ▲2 |
MailChannels
|
6.9% | ||
| 5 | ▲12 |
Mandrill
|
5.6% | ||
| … | |||||
| 35 | ▼3 | SmtpJS | <0.1% | ||
All-time shares across the new sites we track: of all of them, and of the sites using any Transactional Email tool. Among September launches it ranked #37 in Transactional Email, down from #34 in August. All 172 in Transactional Email
Often used with SmtpJS
| Tool | Sites with both | vs all new sites |
|---|---|---|
jsDelivr
|
32 | 12x |
cdnjs
|
30 | 11x |
Font Awesome
|
38 | 9.2x |
Tools that turn up far more often on SmtpJS sites than on new sites in general, and how many times as common each one is there.
Recently launched products built on SmtpJS
9 of the 63 sites using SmtpJS are product launches we list individually. The other 54 are new business and personal sites: they count towards the figures above but are not listed here. A watch sends them to you.
-
Classic Movers
classicmovers.ae
-
ONBO
samta.ai
-
Sunlit Urbana Panchkula
sunliturbana.in
-
Main Street PT
mainstreetpt.com
-
CORA
samta.ai
-
TATVA
samta.ai
Watches, exports and the API give you all 63 sites using SmtpJS, from £15 a month.
Notes
- These figures cover websites that went live since April 2026, not the web as a whole.
- Country comes from what each site says about itself, such as a company registration, legal terms or a phone number, not just its domain ending. Too few sites state their country plainly for the usual count, so this one also counts single signals: a country domain ending, a phone number (for North America, its area code), a location the site declares in its own page metadata, or a country-specific vendor stack and the page language where they agree and nothing contradicts them. Read these as likely rather than certain.
How this page is made
FirstSited looks at each new website near the day it goes live and records what it was built with. We do not go back later, so these figures describe what sites launch with, not what they run today. A site counts towards SmtpJS when we detect SmtpJS on it at that look.
Every share on this page is a proportion of the new sites we were tracking at the time. Sites we found across the wider web count towards the figures, but only product launches are listed by name. How we detect technologies · How we find new sites