Sites using SMTP.bz
Transactional SMTP email relay service.
Get told when a new site ships with SMTP.bz.
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See how alerts work61 sites
54 found by StackScope, 7 via launch platforms
- StackScope Wider Web 29
- StackScope Discovery (Indie) 25
- Product Hunt 6
- Hacker News 1
SMTP.bz has been detected on 61 launches we've crawled. The 7-day rolling share is 0.0%, roughly steady week on week. Most recent detection: AddonManager — one-click UI for 3.3.5a, today.
It's most commonly paired with nginx, Yandex Metrica, and Google Search Console. By product type, the launches using it are most often Developer Tools (23%), Marketing (23%), and E-commerce (14%).
What kind of products ship with SMTP.bz
22 launches
Domain endings using SMTP.bz
61 sites
- .com 34.43%
- .online 11.48%
- .app 9.84%
- .space 6.56%
- .store 4.92%
- .cloud 3.28%
- .co 3.28%
- .io 3.28%
- .org 3.28%
Share of new sites using SMTP.bz
Each dot is one launch day. Line is the 7-day rolling average; weekly averages before June 2026.
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.
Transactional Email leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 | – |
Resend
|
5.47% | 64.07% |
| #2 | ▲1 |
SendGrid
|
0.66% | 7.76% |
| #3 | ▼2 |
Amazon SES
|
0.65% | 7.61% |
| #4 | ▲1 |
MailChannels
|
0.51% | 6.02% |
| #5 | – |
Mail.Baby
|
0.44% | 5.16% |
| … | ||||
| #32 | ▼5 | SMTP.bz Current page | <0.01% | 0.03% |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Transactional Email tool.Among August launches it ranked #33 in Transactional Email, down from #28 in July. All 148 in Transactional Email →
Often used with
| Tool | Launches |
|---|---|
nginx
|
5 |
Yandex Metrica
|
4 |
Google Search Console
|
3 |
Google Workspace
|
2 |
Google Analytics
|
2 |
Tools most often detected on the same launches as SMTP.bz.
Recent launches we can show
32 of the 61 sites using SMTP.bz are product launches we list individually. The other 29 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
Про нас — приложение для двоих
Reducto — онлайн-запись на отработки
CS2 Report Bot — AI CS2 Demo Analysis
Developer Tools
1KAR — First Knight Arena
Games
Pitlords
chasy.net СБП — Стабильный и свободный интернет
EXTRA — AI operator for contact center peak demand
Marketing
polarpawastro.com
Glitch — мессенджер со сквозным шифрованием
wheelko — аренда авто и мото на Самуи
Crypto
ИИ-фотосессия онлайн без студии и фотографа за 30 секунд | Фоточка Онлайн
Showing the most recent 12 of 32.
The StackScope API serves all 61 sites using SMTP.bz, filterable and exportable, from £15 a month.