Websites Powered by SmtpJS
2,887 websites tracked using SmtpJS (Email) · smtpjs.com
SmtpJS is a email delivery or marketing service. Its official site is smtpjs.com. PoweredBy tracks the websites that use SmtpJS across the public web; the tracked counts, adoption trend, and site list on this page are updated from our ongoing crawl of the email ecosystem.
Usage trend
250
500
750
1K
Nov 2022
Nov 2023
Oct 2024
Oct 2025
Sep 2026
Domains observed using SmtpJS in each month's HTTP Archive crawl,
Nov 2022 to Sep 2026 · peak 905 in Oct 2024. The tracked total above also
counts sites not re-crawled recently.
Core Web Vitals
LCP 2.4 s
INP 75 ms
CLS 0
TTFB 800 ms
Median site among 662 SmtpJS sites with Chrome UX data, p75 values, Sep 2026.
Top countries
India
262
United States
86
Brazil
63
Indonesia
48
United Kingdom
46
Pakistan
45
Spain
41
France
41
Sites using SmtpJS by audience country, Chrome UX Report.
Usage by industry
| Industry | Share | Websites |
|---|---|---|
| Government | 0.01% | 1 |
| Education | <0.01% | 4 |
| Professional services | <0.01% | 3 |
| Travel and hospitality | <0.01% | 5 |
| Finance and insurance | <0.01% | 1 |
| Restaurants and food | <0.01% | 5 |
| Retail | <0.01% | 11 |
| Software and apps | <0.01% | 4 |
| Healthcare | <0.01% | 3 |
| Arts and entertainment | <0.01% | 1 |
| Automotive | <0.01% | 1 |
Share of each industry's websites with a detected stack that use SmtpJS; industries come from what sites declare in their own structured data.
Top sites by authority
9+
1% · 4 of 372 sites
8+
<1% · 6 of 7,677 sites
7+
<1% · 7 of 45,712 sites
6+
<1% · 7 of 110,136 sites
5+
<1% · 8 of 246,751 sites
The share of the web's most authoritative domains, by Open Page Rank tier, seen running SmtpJS in recent crawls. Only 372 domains worldwide score 9 or higher.
Websites using SmtpJS
| # | Domain | Open Page RankOPR | Est. monthly visits (US)Visits (US) | Keywords | First seen |
|---|---|---|---|---|---|
| 1 | github.io | 9.43/10 | 1,800 | 1 | Nov 2022 |
| 2 | zendesk.com | 9.10/10 | 416,900 | 60,938 | Nov 2022 |
| 3 | vercel.app | 9.05/10 | - | - | Apr 2023 |
| 4 | netlify.app | 9.01/10 | 2 | 2 | Nov 2022 |
| 5 | web.app | 8.76/10 | - | - | Nov 2022 |
| 6 | co.ua | 8.02/10 | - | - | Nov 2022 |
| 7 | amplifyapp.com | 7.46/10 | - | - | Apr 2026 |
| 8 | aylo.com | 5.47/10 | 5,300 | 159 | Sep 2023 |
| 9 | wel-com.fr | 4.88/10 | - | - | Jun 2023 |
| 10 | yo.fr | 4.81/10 | - | - | Nov 2022 |
| 11 | entab.in | 4.75/10 | - | - | Jun 2024 |
| 12 | icd.ca | 4.74/10 | - | - | Dec 2023 |
| 13 | code-brew.com | 4.72/10 | - | - | Feb 2023 |
| 14 | tolive.com | 4.69/10 | - | - | Nov 2022 |
| 15 | sanas.co.za | 4.18/10 | - | - | Nov 2022 |
| 16 | daring.com | 4.07/10 | - | - | Aug 2023 |
| 17 | sakani.sa | 4.04/10 | - | - | Jun 2024 |
| 18 | cu-elibrary.com | 3.99/10 | - | - | Jul 2023 |
| 19 | dastegernsee.de | 3.93/10 | - | - | Nov 2022 |
| 20 | senadord.gob.do | 3.86/10 | - | - | Nov 2022 |
| 21 | rockyridgebrewing.com.au | 3.86/10 | - | - | Feb 2026 |
| 22 | intcomex.com | 3.75/10 | - | - | Nov 2022 |
| 23 | skoatch.com | 3.64/10 | - | - | Apr 2024 |
| 24 | jetshr.com | 3.49/10 | - | - | Oct 2025 |
| 25 | smx.tech | 3.48/10 | - | - | Nov 2022 |
| 26 | pureaqua.com | 3.30/10 | - | - | Nov 2022 |
| 27 | daralber.ae | 3.29/10 | - | - | Nov 2022 |
| 28 | swissbioisostere.ch | 3.09/10 | - | - | Nov 2022 |
| 29 | fabricsandhome.com | 3.06/10 | - | - | Nov 2022 |
| 30 | apap.com.do | 3.05/10 | 480 | 465 | Nov 2022 |
| 31 | celebrate.buzz | 3.05/10 | - | - | Nov 2022 |
| 32 | grb.es | 2.97/10 | - | - | Nov 2022 |
| 33 | bistrot64.it | 2.91/10 | - | - | Nov 2022 |
| 34 | jayakartahotelsresorts.com | 2.89/10 | - | - | Nov 2022 |
| 35 | adoptlondon.org.uk | 2.84/10 | 1 | 62 | Aug 2023 |
| 36 | rosewoodwine.com | 2.82/10 | - | - | Nov 2022 |
| 37 | diy-robotics.com | 2.81/10 | - | - | Nov 2022 |
| 38 | pern.edu.pk | 2.80/10 | - | - | Sep 2025 |
| 39 | gmedia.id | 2.68/10 | - | - | Aug 2023 |
| 40 | cpsgo.com | 2.58/10 | - | - | Mar 2023 |
| 41 | chools.in | 2.58/10 | - | - | Nov 2022 |
| 42 | villagedentalmedicine.com | 2.50/10 | - | - | Nov 2022 |
| 43 | domyassignments.ai | 2.50/10 | - | - | Oct 2023 |
| 44 | goldysbreakfastbistro.com | 2.48/10 | - | - | Nov 2022 |
| 45 | ambar.pt | 2.48/10 | - | - | Nov 2022 |
| 46 | openmygame.com | 2.44/10 | - | - | Feb 2024 |
| 47 | installationpompeachaleur.fr | 2.42/10 | - | - | Jun 2023 |
| 48 | asecommunityfoundation.com | 2.41/10 | 6 | 4 | Nov 2023 |
| 49 | verificafirma.it | 2.32/10 | - | - | Jul 2023 |
| 50 | thecotocongroup.com | 2.32/10 | - | - | Feb 2025 |
| 51 | biharinfozone.in | 2.31/10 | - | - | Jul 2026 |
| 52 | nepa.gov.af | 2.31/10 | - | - | Dec 2024 |
| 53 | evagher.com | 2.19/10 | - | - | Nov 2022 |
| 54 | lylies.com | 2.15/10 | - | - | Jul 2023 |
| 55 | inspiredsquare.com | 2.14/10 | - | - | Nov 2023 |
| 56 | hirebeat.co | 2.13/10 | - | - | Nov 2022 |
| 57 | nadiaglobal.com | 1.99/10 | - | - | Sep 2023 |
| 58 | ias.ca | 1.99/10 | - | - | Dec 2023 |
| 59 | rightseat.rw | 1.93/10 | - | - | Nov 2022 |
| 60 | syssteel.com | 1.92/10 | - | - | Nov 2022 |
| 61 | zebra-comics.com | 1.91/10 | - | - | Dec 2022 |
| 62 | lemongrass.se | 1.91/10 | - | - | Nov 2022 |
| 63 | veka.ro | 1.86/10 | - | - | Nov 2022 |
| 64 | afex.africa | 1.86/10 | 29 | 13 | Sep 2024 |
| 65 | qairadrones.com | 1.83/10 | - | - | Nov 2022 |
| 66 | nis.co.in | 1.82/10 | - | - | Nov 2022 |
| 67 | nbarestaurant.com | 1.81/10 | - | - | Apr 2023 |
| 68 | zkwp.bydgoszcz.pl | 1.81/10 | - | - | Feb 2025 |
| 69 | cdrwriteraustralia.com | 1.81/10 | - | - | Apr 2023 |
| 70 | queenstandoor.com | 1.78/10 | - | - | Apr 2024 |
| 71 | adventurerocks.in | 1.78/10 | 1 | 9 | Apr 2024 |
| 72 | seeknow.app | 1.74/10 | - | - | Feb 2026 |
| 73 | adxom.com | 1.73/10 | - | 1 | Aug 2025 |
| 74 | royoapps.com | 1.71/10 | - | - | Nov 2022 |
| 75 | zinara.co.zw | 1.69/10 | - | - | Dec 2024 |
| 76 | mypatrahotels.com | 1.68/10 | - | - | Feb 2023 |
| 77 | shinefertility.com | 1.68/10 | - | - | Apr 2023 |
| 78 | crewdible.com | 1.66/10 | - | - | Nov 2022 |
| 79 | sevenpay.in | 1.65/10 | - | - | Sep 2023 |
| 80 | stepup.ae | 1.65/10 | - | - | Nov 2022 |
| 81 | pnq.com.au | 1.64/10 | - | - | Oct 2025 |
| 82 | stellatechnology.com | 1.59/10 | - | - | Nov 2022 |
| 83 | jupiterinternationalhotel.com | 1.59/10 | - | - | Nov 2022 |
| 84 | artwalla.com | 1.58/10 | - | - | Nov 2022 |
| 85 | samta.ai | 1.58/10 | - | - | Apr 2023 |
| 86 | takanimali.org | 1.57/10 | - | - | Jan 2023 |
| 87 | datenwissen.com | 1.57/10 | - | - | Jan 2023 |
| 88 | aisight.ai | 1.56/10 | - | 1 | Aug 2023 |
| 89 | aurum-brno.cz | 1.56/10 | - | 1 | Sep 2025 |
| 90 | pinkfishfestival.com | 1.56/10 | - | - | Nov 2023 |
| 91 | unifiedpictures.com | 1.56/10 | - | - | Mar 2024 |
| 92 | nmp.com.pk | 1.55/10 | - | - | Apr 2023 |
| 93 | jtcindia.org | 1.54/10 | - | - | Feb 2024 |
| 94 | play-point.es | 1.53/10 | - | - | Sep 2024 |
| 95 | fusionnet.in | 1.52/10 | - | - | Feb 2025 |
| 96 | simplysecuresign.com | 1.51/10 | - | - | Jan 2023 |
| 97 | code-brew.ae | 1.49/10 | - | - | Jun 2026 |
| 98 | densfordcivil.com.au | 1.49/10 | - | - | Sep 2025 |
| 99 | pitjarus.com | 1.45/10 | - | - | Nov 2022 |
| 100 | ebizframe.com | 1.45/10 | - | - | Sep 2023 |
Open Page Rank is the domain's authority score (0 to 10, from the open web link graph); the list is ordered by it and covers sites seen in recent crawls. Visits and keywords are estimated US organic search figures.
Download top 10,000 as CSV (zip) →
Columns: domain, Open Page Rank, first seen, last seen, industry (from the site's own structured data, blank when none).