Maileroo on new websites

1. Maileroo appeared on about 44 new sites in the last 30 days.^[1]

The line is the 7-day average share of new sites that use Maileroo, 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 Maileroo itself changing.^[2][3]

#	Movement	Tool	Share of all sites	Share of category	Bar
1	–	Resend	4.2%	58.4%
2	▼1	SendGrid	0.5%	7.1%
3	▼2	Amazon SES	0.5%	7.1%
4	▲2	MailChannels	0.5%	6.8%
5	▲1	Mail.Baby	0.4%	5.5%
…
24	▼2	Maileroo	<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. The most common alternatives to Maileroo on new websites are Resend and Amazon SES. Among September launches it ranked #26 in Transactional Email, down from #24 in August. All 172 in Transactional Email

Tool	Sites with both	vs all new sites	Bar
Next.js	88	2.2x
Cloudflare DNS	175	2.0x

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

172 of the 284 sites using Maileroo are product launches we list individually. The other 112 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one.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
Hearthlane — One place for the work between appointments medrina.online · Health	Oct 19
hackerparty — run the hackathon, not the spreadsheet hackerparty.app	Oct 19
MySiteGPT Assistant mysitegptassistant.com · AI	Oct 18
SwitchReel: swap anyone into any video switchreel.com · Social	Oct 17
PDF Tower: Fill, Edit, Merge, Compress and Sign PDFs in Your Browser pdftower.com · Productivity	Oct 17
Swift Outbox: personal cold email, researched for every lead | Swift Outbox swiftoutbox.com · Marketing	Oct 15
tous vos liens, une seule adresse be.page	Oct 12
WaterMES Platform | Modern Water Manufacturing Execution System watermes.com	Oct 10
Teman Tryout — Lolos PTN Impianmu, Mulai dari Sekarang temantryout.com	Oct 8
Kesteria — tools for DSP owners kesteria.com	Oct 8
QR Code Photo Sharing for Weddings & Events · Pixèsta pixesta.com · Social	Oct 7
MoblOps moblops.com · Productivity · United States	Oct 7

Showing the most recent 12 of 172.

The StackScope API serves all 284 sites using Maileroo, 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.
5. Green hosting is the share whose web host The Green Web Foundation lists as running on green energy, among sites checked since 1 April 2026, against the same share for every new site we checked over that time. Data from The Green Web Foundation.