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SMTP Engine on new websites

Transactional email relay service detectable via SPF include for smtp-engine.com.

Sites using SMTP Engine
5
since May 2026
Last 30 days
0.0%
of new sites, to Oct 20
no change on the 30 days before
Last 7 days
0.0%
of new sites, 7-day average
no change on the week before
Rank in Transactional Email
#84
of 173 tools, all time
First seen May 25, 2026
Last seen Sep 27, 2026

What we found

  1. SMTP Engine appeared on 1 new site in the last 30 days.[1]

Share of new sites using SMTP Engine

0.0000% 0.0001% 0.0002% 0.0003% 0.0004% 11 Sep Oct

The line is the 7-day average share of new sites that use SMTP Engine, since 11 September. It starts at our first detection.

Transactional Email on new sites

# Movement Tool Share of all sites Share of category Bar
1 – Resend 4.2% 58.2%
2 ▼1 SendGrid 0.5% 7.1%
3 ▼2 Amazon SES 0.5% 7.1%
4 ▲2 MailChannels 0.5% 6.9%
5 ▲12 Mandrill 0.4% 5.7%
…
84 ▲11 SMTP Engine <0.1% <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 #65 in Transactional Email, up from #76 in August. All 173 in Transactional Email

Recently launched products built on SMTP Engine

2 of the 5 sites using SMTP Engine are product launches we list individually. The other 3 are new business and personal sites: they count towards the figures above but are not listed here. A watch sends them to you.

Site Found Also detected
REG121 reg121.com Aug 4 Next.js React Cloudflare Envoy
IT and Compliance Jobs Isle of Man orchardrecruitment.com · Hiring & HR May 25 20i Google Analytics Google Hosted Libraries Google Tag Manager

Watches, exports and the API give you all 5 sites using SMTP Engine, from £15 a month.

Notes

  1. These figures cover websites that went live since April 2026, not the web as a whole.

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 SMTP Engine when we detect SMTP Engine 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

Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.