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Sites using Postal

Open source mail delivery platform that organisations self host to send transactional and bulk email.

#6 of 159 in Transactional Email First seen: Apr 21, 2026 Last seen: Sep 19, 2026 Website: postalserver.io
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14,679 sites

14,656 found by StackScope, 23 via launch platforms

StackScope Wider Web 14,465 StackScope Discovery (Indie) 191 Product Hunt 15 Hacker News 3 PeerPush 3 Other 2
  • StackScope Wider Web 14,465
  • StackScope Discovery (Indie) 191
  • Product Hunt 15
  • Hacker News 3
  • PeerPush 3
  • Other 2
View: All sites All launches Launch platforms StackScope Discovery StackScope Wider Web
Last 7 days 0.4% -0.1pp
Most used with BusinessIdentity.LLC, BusinessIdentity.LLC, WordPress
Top product types Health, Finance, E-commerce

Postal has been detected on 14,679 launches we've crawled, with 6515 of those in September 2026 (0.5% of the month's launches so far). The 7-day rolling share is 0.4%, roughly steady week on week. Most recent detection: Freehold Agents — Own your AI. Don’t rent it., today.

It's most commonly paired with BusinessIdentity.LLC, BusinessIdentity.LLC, and WordPress. By product type, the launches using it are most often Health (27%), Finance (17%), and E-commerce (12%). By domain ending, launches using it are 2.9 times as likely as the average launch to live on a .net domain. The 21 scored launches using Postal average a StackScope score of 6.6 out of 10, against 6.4 across all launches we score.

What kind of products ship with Postal

2,425 launches

Health
26.56%
Finance
16.74%
E-commerce
12.33%
Developer Tools
8.37%
Games
7.84%
Education
5.53%
Marketing
5.20%
Social
4.99%
Content
4.62%
Design
2.39%
Productivity
2.31%
Hiring & HR
1.48%
AI
1.11%
Crypto
0.45%
Directory
0.08%

Domain endings using Postal

14,658 sites

  • .com 88.18%
  • .net 5.70%
  • .org 5.33%
  • .app 0.25%
  • .online 0.07%
  • .xyz 0.05%
  • .io 0.05%
  • .ai 0.04%
  • .co 0.03%
  • .me 0.03%
  • .space 0.03%
  • .dev 0.02%
  • .llc 0.02%
  • .site 0.02%
  • .uk 0.02%

Country

17 of 14,679 sites, where we are semi-confident of the country.

  • United States United States 35.29%
  • Brazil Brazil 11.76%
  • Switzerland Switzerland 5.88%
  • Egypt Egypt 5.88%
  • France France 5.88%
  • United Kingdom United Kingdom 5.88%
  • India India 5.88%
  • Philippines Philippines 5.88%
  • Poland Poland 5.88%
  • Romania Romania 5.88%
  • Sweden Sweden 5.88%

Share of new sites using Postal

Each dot is one launch day. Line is the 7-day rolling average; weekly averages before June 2026.

0.4%
last 7 days
-0.1pp vs prior week
0.5%
September so far
6,515 of 1,286,414 sites
14,679
sites all time
since Apr 2026
Postal daily detection trend Before 8 July 2026: launch platforms only. We began crawling the wider web on this date, so the cohort this share is measured against changes here. 5% 2% 0% Apr May Jun Jul Aug Sep 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. Weekly averages before this point, daily after. Jun 21 · 1 / 382 = 0.3% Jun 22 · 1 / 576 = 0.2% Jun 23 · 0 / 900 = 0.0% Jun 24 · 0 / 737 = 0.0% Jun 25 · 0 / 618 = 0.0% Jun 26 · 0 / 534 = 0.0% Jun 27 · 0 / 431 = 0.0% Jun 28 · 0 / 382 = 0.0% Jun 29 · 0 / 502 = 0.0% Jun 30 · 0 / 801 = 0.0% Jul 1 · 0 / 795 = 0.0% Jul 2 · 0 / 603 = 0.0% Jul 3 · 0 / 499 = 0.0% Jul 4 · 0 / 411 = 0.0% Jul 5 · 0 / 367 = 0.0% Jul 6 · 0 / 551 = 0.0% Jul 7 · 0 / 1179 = 0.0% Jul 8 · 1 / 12589 = 0.0% Jul 9 · 4 / 23772 = 0.0% Jul 10 · 2 / 22587 = 0.0% Jul 11 · 1 / 16063 = 0.0% Jul 12 · 1 / 20355 = 0.0% Jul 13 · 0 / 20993 = 0.0% Jul 14 · 1 / 20485 = 0.0% Jul 15 · 0 / 17329 = 0.0% Jul 16 · 0 / 14332 = 0.0% Jul 17 · 0 / 19813 = 0.0% Jul 18 · 0 / 22787 = 0.0% Jul 19 · 0 / 26333 = 0.0% Jul 20 · 0 / 22735 = 0.0% Jul 21 · 0 / 21725 = 0.0% Jul 22 · 0 / 23248 = 0.0% Jul 23 · 1 / 16902 = 0.0% Jul 24 · 1 / 12870 = 0.0% Jul 25 · 0 / 8960 = 0.0% Jul 26 · 24 / 20038 = 0.1% Jul 27 · 66 / 33951 = 0.2% Jul 28 · 100 / 38340 = 0.3% Jul 29 · 175 / 50228 = 0.3% Jul 30 · 175 / 44067 = 0.4% Jul 31 · 180 / 51271 = 0.4% Aug 1 · 183 / 50668 = 0.4% Aug 2 · 149 / 49871 = 0.3% Aug 3 · 208 / 48380 = 0.4% Aug 4 · 135 / 37460 = 0.4% Aug 5 · 56 / 32788 = 0.2% Aug 6 · 83 / 36676 = 0.2% Aug 7 · 93 / 37927 = 0.2% Aug 8 · 83 / 39779 = 0.2% Aug 9 · 155 / 34337 = 0.5% Aug 10 · 48 / 29029 = 0.2% Aug 11 · 45 / 32200 = 0.1% Aug 12 · 82 / 33689 = 0.2% Aug 13 · 122 / 50204 = 0.2% Aug 14 · 186 / 51632 = 0.4% Aug 15 · 162 / 51701 = 0.3% Aug 16 · 199 / 52032 = 0.4% Aug 17 · 117 / 41684 = 0.3% Aug 18 · 180 / 54184 = 0.3% Aug 19 · 173 / 49684 = 0.3% Aug 20 · 154 / 67060 = 0.2% Aug 21 · 479 / 90589 = 0.5% Aug 22 · 512 / 91722 = 0.6% Aug 23 · 603 / 90637 = 0.7% Aug 24 · 372 / 79355 = 0.5% Aug 25 · 377 / 69613 = 0.5% Aug 26 · 316 / 65564 = 0.5% Aug 27 · 410 / 84026 = 0.5% Aug 28 · 352 / 83953 = 0.4% Aug 29 · 439 / 84784 = 0.5% Aug 30 · 504 / 93291 = 0.5% Aug 31 · 429 / 91009 = 0.5% Sep 1 · 676 / 92658 = 0.7% Sep 2 · 625 / 98830 = 0.6% Sep 3 · 524 / 93945 = 0.6% Sep 4 · 458 / 89777 = 0.5% Sep 5 · 542 / 93563 = 0.6% Sep 6 · 531 / 82180 = 0.6% Sep 7 · 375 / 79154 = 0.5% Sep 8 · 286 / 72306 = 0.4% Sep 9 · 320 / 68701 = 0.5% Sep 10 · 318 / 72714 = 0.4% Sep 11 · 388 / 78123 = 0.5% Sep 12 · 333 / 51397 = 0.6% Sep 13 · 190 / 53660 = 0.4% Sep 14 · 212 / 53835 = 0.4% Sep 15 · 189 / 53234 = 0.4% Sep 16 · 202 / 53793 = 0.4% Sep 17 · 188 / 51478 = 0.4% Sep 18 · 158 / 47066 = 0.3%
Mar 30, 2026 90 days Sep 18, 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 4.76% 60.57%
#2 ▲1 SendGrid 0.64% 8.20%
#3 ▼2 Amazon SES 0.57% 7.29%
#4 ▲1 MailChannels 0.52% 6.64%
#5 – Mail.Baby 0.45% 5.76%
#6 ▲3 Postal Current page 0.39% 5.00%

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 #6 in Transactional Email, up from #9 in July. All 159 in Transactional Email →

Often used with

Tool Sites
BusinessIdentity.LLC 14,546
BusinessIdentity.LLC 14,125
WordPress 13,159
OpenResty 13,108
jQuery 4,564

Tools most often detected on the same sites as Postal.

Recent launches we can show

214 of the 14,679 sites using Postal are product launches we list individually. The other 14,465 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

Freehold Agents — Own your AI. Don’t rent it. Sep 19, 2026 AI Rep Rivals — Every rep counts Sep 18, 2026 Games Screenshot of prop.GIS™, a launch using Postal prop.GIS™ Sep 18, 2026 · score 5.0 Sterling - Restaurant Health Inspection Score App Sep 18, 2026 ShopClear — Clear repairs. Proof you can see. Sep 16, 2026 E-commerce Soren Technologies — Software that solves everyday problems Sep 16, 2026 Aegis — Adversarial Upwork Intelligence Sep 16, 2026 Pangisa — Find your next home in Uganda Sep 15, 2026 Leon Tucker — Dashboards & Internal Tools for Service Businesses Sep 15, 2026 Developer Tools Ozevon — Software for clearer work Sep 15, 2026 Productivity Complete Website & Logo for Local Service Pros | $147 Sep 15, 2026 ThePDFBuddy — Free PDF Tools Sep 13, 2026 Productivity

Showing the most recent 12 of 214.

The StackScope API serves all 14,679 sites using Postal, filterable and exportable, from £15 a month.

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