Premium SMTP on new websites

1. Premium SMTP appeared on about 540 new sites in the last 30 days.^[1]
2. It is the third most common email security service on new sites. AntiSpamCloud appears on about 4.5 times as many.
3. It is unusually common on .fr domains: 7.2% of the domains running it, against 1.9% of domains across new sites.

The line is the 7-day average share of new sites that use Premium SMTP, day by day for the last 90 days and weekly before that (left of the dashed line). The shaded areas were measured against a different set of sites, so the line can step there without Premium SMTP itself changing.^[2][3]

#	Movement	Tool	Share of all sites	Share of category	Bar
1	–	AntiSpamCloud	0.1%	33.7%
2	–	Proofpoint Essentials	0.1%	32.5%
3	–	Premium SMTP	<0.1%	7.8%
4	–	SpamExperts	<0.1%	4.5%
5	–	MailSentinel	<0.1%	2.9%

All-time shares across the new sites we track: of all of them, and of the sites using any Email Security tool. All 175 in Email Security

Tool	Sites with both	vs all new sites	Bar
Bootstrap	232	4.1x
Font Awesome	311	3.6x
PHP	548	2.5x
jQuery	444	2.4x
WordPress	350	2.2x

Tools that turn up far more often on Premium SMTP sites than on new sites in general, and how many times as common each one is there.

125 of the 1,310 sites using Premium SMTP are product launches we list individually. The other 1,185 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. They are included in the StackScope API and in Stackdar alerts.

Site	Found	Also detected
Surplus AI — Florida tax deed surplus research with the evidence attached surplusclock.com · Finance	Oct 18
Des appels d’offres aux candidatures, tout devient plus simple. — Bidnuvia bidnuvia.com	Oct 17
Kargoo — Plateforme Logistique Globale kargoopro.com · Productivity	Oct 15
Plantsound · Écoutez votre plante · 5 minutes offertes plantsound.fr · United Kingdom	Oct 15
Global Flash Send — Une seule API pour toute votre communication globalflashsend.com · Developer Tools	Oct 14
WISER Influence — Connecter. Influencer. Performer. wiserinfluence.net	Oct 14
GestNotes – Le logiciel de gestion scolaire gestnotes.org · Productivity	Oct 13
Codéin codein-app.com	Oct 13
Greencelium — entraide RSE gratuite et feuille de route régénérative greencelium.com · France	Oct 13
Bienvenue | GBA-CONTROLE gba-controle.online	Oct 11
Tradessor — Le pare-feu IA qui protège votre capital de trading tradessor.com · Finance	Oct 9
Gara — Gestion de parkings motos & voitures au Bénin gara-benin.com	Oct 9

Showing the most recent 12 of 125.

The StackScope API serves all 1,310 sites using Premium SMTP, filterable and exportable, from £15 a month.

1. These figures cover websites that went live since April 2026, not the web as a whole.
2. Grey: before 8 July 2026, we only tracked launches from launch platforms. From that date we crawl the wider web as well, so the share is measured against a much larger set of sites. For one continuous measure, view launch platforms only.
3. Amber: 8 July to 10 September 2026, before we improved our infrastructure to index new sites much sooner, often on the day they go live. Sites found that early often haven't finished setting up, so anything usually added after launch reads lower from 10 September. We record each site as it was when we found it.
4. 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.