Sites using MailSentinel
Hosted anti-spam and email filtering gateway for inbound and outbound mail.
Get told when a new site ships with MailSentinel.
Stackdar watches every launch we detect and sends you the ones using MailSentinel, by email, Slack or webhook. On every plan, from £15 a month.
See how alerts work351 sites
347 found by StackScope, 4 via launch platforms
- StackScope Wider Web 334
- StackScope Discovery (Indie) 13
- Product Hunt 3
- Other 1
MailSentinel has been detected on 351 launches we've crawled, with 141 of those in September 2026 (0.0% of the month's launches so far). The 7-day rolling share is 0.0%, roughly steady week on week. Most recent detection: MyPOOL App – Pengurusan Kolam Renang Pintar, today.
It's most commonly paired with LiteSpeed Web Server, HTTP/3, and Google Fonts. By product type, the launches using it are most often Finance (26%), E-commerce (23%), and Health (12%). By domain ending, launches using it are 1.8 times as likely as the average launch to live on a .com domain.
What kind of products ship with MailSentinel
97 launches
Domain endings using MailSentinel
351 sites
- .com 84.62%
- .co 2.28%
- .net 2.28%
- .io 1.71%
- .org 1.42%
- .me 1.14%
- .my 0.85%
- .tech 0.85%
- .xyz 0.85%
- .app 0.57%
- .ca 0.57%
- .online 0.57%
- .store 0.57%
- .ai 0.28%
Share of new sites using MailSentinel
Each dot is one launch day. Line is the 7-day rolling average; weekly averages before June 2026. Chart starts at first detection.
The shaded part of the chart is measured against a different set of sites. Until 8 July 2026 we only tracked launches from launch platforms; from that date we crawl the wider web as well. The share is a proportion of whatever we were tracking at the time, so it can step at that line without the technology itself changing. For a single continuous measure, switch to launch platforms.
How StackScope detects technologies
⋮ Jul 3, 2026: Email provider detection improved: providers identified from mail configuration are now caught on a site's first crawl. Earlier data may slightly undercount.
Email Security leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 | – |
DNSSmartHost
|
0.40% | 64.81% |
| #2 | – |
MailSpamProtection
|
0.39% | 63.16% |
| #3 | – |
AntiSpamCloud
|
0.10% | 16.24% |
| #4 | ▲2 | Premium SMTP | 0.02% | 3.20% |
| #5 | – | SpamExperts | 0.01% | 2.26% |
| … | ||||
| #7 | – | MailSentinel Current page | 0.01% | 1.42% |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Email Security tool. All 165 in Email Security →
Often used with
| Tool | Sites |
|---|---|
LiteSpeed Web Server
|
327 |
| HTTP/3 | 271 |
Google Fonts
|
207 |
jQuery
|
174 |
WordPress
|
169 |
Tools most often detected on the same sites as MailSentinel.
Recent launches we can show
17 of the 351 sites using MailSentinel are product launches we list individually. The other 334 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. How StackScope Discovery works
Structure+ | SketchUp Stage, Truss & Scaffolding Plugin
ELITE POKER GUIDE
MisiCerdas — Daily Math & English Missions for Malaysian Kids
Education
命盘 · 八字与紫微斗数排盘 · 真太阳时校正
RISE Career Readiness Ecosystem — The Career Readiness Platform
ZORIX — Towards Zero Risk
CARSYOK | Car Sales System
Marketing
KaZing — Duit masuk, terus dengar
NearVanna — Live event tickets
MarketOS — AI Marketing Platform for Malaysian SMEs
Marketing
Primingo
Showing the most recent 12 of 17.
The StackScope API serves all 351 sites using MailSentinel, filterable and exportable, from £15 a month.