Sites using mailcow
Self-hosted mail server suite with a web admin panel, built on Docker.
Get told when a new site ships with mailcow.
Stackdar watches every launch we detect and sends you the ones using mailcow, by email, Slack or webhook. On every plan, from £15 a month.
See how alerts work63 sites
60 found by StackScope, 3 via launch platforms
- StackScope Wider Web 45
- StackScope Discovery (Indie) 15
- Product Hunt 3
mailcow has been detected on 63 launches we've crawled, with 23 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: F-Droid 2.0, yesterday.
It's most commonly paired with Cloudflare DNS, Cloudflare, and HTTP/3. By product type, the launches using it are most often Developer Tools (17%), Health (13%), and Marketing (13%).
What kind of products ship with mailcow
23 launches
Domain endings using mailcow
63 sites
- .com 36.51%
- .app 9.52%
- .org 6.35%
- .ca 4.76%
- .me 4.76%
- .online 4.76%
- .br 3.17%
- .cloud 3.17%
- .de 3.17%
- .fr 3.17%
- .net 3.17%
Country
12 of 63 sites, where we are semi-confident of the country.
-
Canada
25.00%
-
Brazil
16.67%
-
Germany
16.67%
-
France
16.67%
-
Netherlands
16.67%
-
United Kingdom
8.33%
Share of new sites using mailcow
Each dot is one launch day. Line is the 7-day rolling average. Chart starts at first detection.
The shaded parts of the chart are measured against a different set of sites.
Grey: until 8 July 2026 we only tracked launches from launch platforms. From that date we crawl the wider web as well.
Amber: on 10 September 2026 we improved our infrastructure so we can 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 that date. We record each site as it was when we found it.
The share is a proportion of whatever we were tracking at the time, so it can step at these lines 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 Hosting leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 | ▼1 |
Google Workspace
|
5.92% | 20.78% |
| #2 | ▲1 |
Hostinger Email
|
5.57% | 19.54% |
| #3 | ▲1 |
IONOS Email
|
1.96% | 6.86% |
| #4 | ▼1 |
Zoho Mail
|
1.63% | 5.70% |
| #5 | ▲1 |
OVH Email
|
1.20% | 4.21% |
| … | ||||
| #370 | ▼70 |
mailcow
Current page
|
<0.01% | 0.01% |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Email Hosting tool.Among August launches it ranked #342 in Email Hosting, down from #272 in July. All 4165 in Email Hosting →
Often used with
| Tool | Sites |
|---|---|
Cloudflare DNS
|
48 |
Cloudflare
|
39 |
| HTTP/3 | 39 |
| HSTS | 36 |
jQuery
|
25 |
Tools most often detected on the same sites as mailcow.
Recent launches we can show
18 of the 63 sites using mailcow are product launches we list individually. The other 45 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
F-Droid 2.0
Korevu | AI Recipes from Your Ingredients
darvis — dein digitaler Butler
Productivity
PantryChef AI | iOS pantry cooking assistant
AI
Nodioo Rights — Droits voisins pour labels
Kyro — trading intelligence
Finance
FEPIX — Gestão de EPI
Marketing
IOSTAY
AIFoxApp — The AI App Factory
AI
FoxCMS — conteúdo e redes sociais num só lugar
Social Play — Inschrijfapp voor tennis, pickleball en padel
Social
Visite immobilière 360° en 5 minutes au téléphone — Nuvila
Showing the most recent 12 of 18.
The StackScope API serves all 63 sites using mailcow, filterable and exportable, from £15 a month.