Sites using SmtpJS
Client-side JavaScript library for sending email via SMTP from the browser.
Found via: Product Hunt 4 · StackScope Wider Web 3
SmtpJS has been detected on 4 launches since first appearing in April 2026. Most recent detection: Sunlit Urbana Panchkula, 4 days ago.
It's most commonly paired with Google Search Console, nginx, and Google Analytics.
Share of new launches using SmtpJS
Each dot is one launch day. Line is the 7-day rolling average.
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
|
19.37% | 72.78% |
| #2 | – |
Amazon SES
|
3.73% | 14.01% |
| #3 | – |
SendGrid
|
2.88% | 10.82% |
| #4 | – |
Mailgun
|
1.26% | 4.74% |
| #5 | – |
Firebase Trigger Email
|
0.99% | 3.73% |
| … | ||||
| #33 | SmtpJS Current page | 0.01% | 0.02% | |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Transactional Email tool. All 66 in Transactional Email →
Often used with
| Tool | Launches |
|---|---|
Google Search Console
|
4 |
nginx
|
3 |
Google Analytics
|
3 |
Google Tag Manager
|
3 |
Microsoft 365
|
2 |
Tools most often detected on the same launches as SmtpJS.
