Sites using L4 Email
Business email hosting service.
Get told when a new site ships with L4 Email.
Stackdar watches every launch we detect and sends you the ones using L4 Email, by email, Slack or webhook. On every plan, from £15 a month.
See how alerts work117 sites
116 found by StackScope, 1 via launch platforms
- StackScope Wider Web 116
- Product Hunt 1
L4 Email has been detected on 117 launches we've crawled, with 5 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: Metamorfosis Intelligence Hub, today.
It's most commonly paired with MailingBoss, HSTS, and OpenResty. By product type, the launches using it are most often Finance (19%), Health (19%), and E-commerce (13%). By domain ending, launches using it are 9.2 times as likely as the average launch to live on a .online domain.
What kind of products ship with L4 Email
16 launches
Domain endings using L4 Email
117 sites
- .com 42.74%
- .online 28.21%
- .site 8.55%
- .br 4.27%
- .store 3.42%
- .ca 2.56%
- .co 2.56%
- .org 1.71%
- .space 1.71%
Share of new sites using L4 Email
Each dot is one launch day. Line is the 7-day rolling average. 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 1, 2026: Adoption figures now count launches from launch platforms. Use the source view to include StackScope Discovery.
⋮ 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
|
6.58% | 23.04% |
| #2 | ▲1 |
Hostinger Email
|
6.45% | 22.58% |
| #3 | ▼1 |
Zoho Mail
|
1.85% | 6.49% |
| #4 | ▲1 |
IONOS Email
|
1.74% | 6.09% |
| #5 | – |
Microsoft 365
|
1.06% | 3.70% |
| … | ||||
| #187 | ▼69 | L4 Email 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 #211 in Email Hosting, down from #142 in July. All 3204 in Email Hosting →
Often used with
| Tool | Sites |
|---|---|
| MailingBoss | 115 |
| HSTS | 113 |
OpenResty
|
112 |
PHP
|
110 |
Builderall
|
102 |
Tools most often detected on the same sites as L4 Email.
Recent launches we can show
1 of the 117 sites using L4 Email are product launches we list individually. The other 116 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 117 sites using L4 Email, filterable and exportable, from £15 a month.