Sites using Theory7 Email
Dutch hosting provider's mail filtering service.
Get told when a new site ships with Theory7 Email.
Stackdar watches every launch we detect and sends you the ones using Theory7 Email, by email, Slack or webhook. On every plan, from £15 a month.
See how alerts workFound via: StackScope Discovery (Indie) 1 · StackScope Wider Web 52
Theory7 Email has been detected on 53 launches we've crawled, with 18 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: Binivo – Smart Appointment Software & Business Management, yesterday.
It's most commonly paired with LiteSpeed Web Server, Theory7, and HTTP/3. By product type, the launches using it are most often Content (40%), Games (20%), and Education (10%).
What kind of products ship with Theory7 Email
10 launches
Domain endings using Theory7 Email
53 sites
- .com 41.51%
- .nl 30.19%
- .org 15.09%
- .app 3.77%
- .eu 3.77%
- .online 3.77%
Country
15 of 53 sites, where we are semi-confident of the country.
-
Netherlands
100.00%
Share of new sites using Theory7 Email
Each dot is one launch day. Line is the 7-day rolling average. Chart starts at first detection.
Email Security leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 | – |
DNSSmartHost
|
0.30% | 57.83% |
| #2 | – |
MailSpamProtection
|
0.29% | 56.37% |
| #3 | – |
AntiSpamCloud
|
0.10% | 18.85% |
| #4 | ▲2 | Premium SMTP | 0.02% | 3.85% |
| #5 | ▼1 | SpamExperts | 0.01% | 2.88% |
| … | ||||
| #16 | ▲32 | Theory7 Email Current page | <0.01% | 0.33% |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Email Security tool.Among August launches it ranked #16 in Email Security, up from #48 in July. All 156 in Email Security →
Often used with
| Tool | Sites |
|---|---|
LiteSpeed Web Server
|
51 |
| Theory7 | 47 |
| HTTP/3 | 38 |
Google Fonts
|
37 |
PHP
|
14 |
Tools most often detected on the same sites as Theory7 Email.
Recent launches we can show
1 of the 53 sites using Theory7 Email are product launches we list individually. The other 52 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one.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
The StackScope API serves all 53 sites using Theory7 Email, filterable and exportable, from £15 a month.