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Sites built with Mailcheck

JavaScript library that suggests corrections for likely typos in email domains.

#44 of 1313 in Javascript Library First seen: May 26, 2026 Last seen: Sep 23, 2026 Website: github.com
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7,351 sites

7,280 found by StackScope, 71 via launch platforms

StackScope Wider Web 7,262 StackScope Discovery (Indie) 18 Product Hunt 64 Other 4 PeerPush 2 Hacker News 1
  • StackScope Wider Web 7,262
  • StackScope Discovery (Indie) 18
  • Product Hunt 64
  • Other 4
  • PeerPush 2
  • Hacker News 1
View: All sites All launches Launch platforms StackScope Discovery StackScope Wider Web
Last 7 days 0.2% +0.0pp
Most used with jQuery, WordPress, WPForms
Top product types E-commerce, Marketing, Health
Green hosting 66% vs 46% avg

Mailcheck has been detected on 7,351 launches we've crawled, with 2866 of those in September 2026 (0.2% of the month's launches so far). The 7-day rolling share is 0.2%, roughly steady week on week. Most recent detection: Niyom - Habit Tracker, today.

It's most commonly paired with jQuery, WordPress, and WPForms. By product type, the launches using it are most often E-commerce (32%), Marketing (18%), and Health (18%). By domain ending, launches using it are 3.5 times as likely as the average launch to live on a .store domain. The 70 scored launches using Mailcheck average a StackScope score of 7.1 out of 10, against 6.4 across all launches we score.

What kind of products ship with Mailcheck

1,871 launches

E-commerce
31.91%
Marketing
18.39%
Health
17.58%
Education
6.73%
Finance
6.20%
Content
4.33%
Developer Tools
2.67%
Games
2.51%
Social
2.19%
Design
2.08%
Productivity
1.92%
AI
1.50%
Hiring & HR
1.23%
Directory
0.48%
Crypto
0.27%

Domain endings using Mailcheck

7,340 sites

  • .com 64.03%
  • .in 9.02%
  • .online 3.43%
  • .uk 3.35%
  • .org 2.55%
  • .ca 2.25%
  • .site 1.99%
  • .store 1.46%
  • .net 1.19%
  • .co 1.12%
  • .se 0.97%
  • .au 0.89%
  • .sk 0.76%
  • .ch 0.68%
  • .space 0.60%

Country

16 of 7,351 sites, where we are confident of the country.

  • India India 43.75%
  • United States United States 12.50%
  • Australia Australia 6.25%
  • Bangladesh Bangladesh 6.25%
  • Canada Canada 6.25%
  • Netherlands Netherlands 6.25%
  • Poland Poland 6.25%
  • Romania Romania 6.25%
  • Singapore Singapore 6.25%

Share of new sites using Mailcheck

Each dot is one launch day. Line is the 7-day rolling average; weekly averages before June 2026. Chart starts at first detection.

0.2%
last 7 days
+0.0pp vs prior week
0.2%
September so far
2,866 of 1,470,545 sites
7,351
sites all time
since May 2026
Mailcheck 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% Jun Jul Aug Sep Jul 1, 2026: Adoption figures now count launches from launch platforms. Use the source view to include StackScope Discovery. Weekly averages before this point, daily after. 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 · 1 / 603 = 0.2% Jul 3 · 0 / 499 = 0.0% Jul 4 · 1 / 411 = 0.2% Jul 5 · 0 / 367 = 0.0% Jul 6 · 0 / 551 = 0.0% Jul 7 · 1 / 1186 = 0.1% Jul 8 · 11 / 12595 = 0.1% Jul 9 · 23 / 23778 = 0.1% Jul 10 · 35 / 22594 = 0.2% Jul 11 · 28 / 16067 = 0.2% Jul 12 · 28 / 20362 = 0.1% Jul 13 · 19 / 20999 = 0.1% Jul 14 · 24 / 20496 = 0.1% Jul 15 · 24 / 17331 = 0.1% Jul 16 · 22 / 14340 = 0.2% Jul 17 · 24 / 19815 = 0.1% Jul 18 · 31 / 22796 = 0.1% Jul 19 · 42 / 26362 = 0.2% Jul 20 · 39 / 22796 = 0.2% Jul 21 · 38 / 21756 = 0.2% Jul 22 · 33 / 23334 = 0.1% Jul 23 · 25 / 16956 = 0.1% Jul 24 · 16 / 12944 = 0.1% Jul 25 · 13 / 8990 = 0.1% Jul 26 · 32 / 20048 = 0.2% Jul 27 · 51 / 33969 = 0.2% Jul 28 · 77 / 38374 = 0.2% Jul 29 · 82 / 50261 = 0.2% Jul 30 · 83 / 44091 = 0.2% Jul 31 · 79 / 51300 = 0.2% Aug 1 · 98 / 50701 = 0.2% Aug 2 · 117 / 49902 = 0.2% Aug 3 · 86 / 48413 = 0.2% Aug 4 · 84 / 37486 = 0.2% Aug 5 · 69 / 32811 = 0.2% Aug 6 · 72 / 36714 = 0.2% Aug 7 · 49 / 37955 = 0.1% Aug 8 · 53 / 39824 = 0.1% Aug 9 · 47 / 34409 = 0.1% Aug 10 · 59 / 29082 = 0.2% Aug 11 · 45 / 32234 = 0.1% Aug 12 · 50 / 33749 = 0.1% Aug 13 · 89 / 50321 = 0.2% Aug 14 · 83 / 51684 = 0.2% Aug 15 · 99 / 51763 = 0.2% Aug 16 · 112 / 52100 = 0.2% Aug 17 · 60 / 41726 = 0.1% Aug 18 · 94 / 54225 = 0.2% Aug 19 · 66 / 49709 = 0.1% Aug 20 · 119 / 67214 = 0.2% Aug 21 · 176 / 90845 = 0.2% Aug 22 · 207 / 91940 = 0.2% Aug 23 · 203 / 91067 = 0.2% Aug 24 · 184 / 79579 = 0.2% Aug 25 · 190 / 69651 = 0.3% Aug 26 · 128 / 65608 = 0.2% Aug 27 · 165 / 84085 = 0.2% Aug 28 · 137 / 83996 = 0.2% Aug 29 · 217 / 84825 = 0.3% Aug 30 · 184 / 93342 = 0.2% Aug 31 · 176 / 91064 = 0.2% Sep 1 · 193 / 92712 = 0.2% Sep 2 · 162 / 98912 = 0.2% Sep 3 · 160 / 94027 = 0.2% Sep 4 · 162 / 89871 = 0.2% Sep 5 · 210 / 93821 = 0.2% Sep 6 · 149 / 82480 = 0.2% Sep 7 · 198 / 79417 = 0.2% Sep 8 · 117 / 72642 = 0.2% Sep 9 · 125 / 68858 = 0.2% Sep 10 · 153 / 72924 = 0.2% Sep 11 · 177 / 78262 = 0.2% Sep 12 · 97 / 51611 = 0.2% Sep 13 · 82 / 53857 = 0.2% Sep 14 · 76 / 54061 = 0.1% Sep 15 · 103 / 53555 = 0.2% Sep 16 · 119 / 54216 = 0.2% Sep 17 · 108 / 52004 = 0.2% Sep 18 · 111 / 48412 = 0.2% Sep 19 · 90 / 41264 = 0.2% Sep 20 · 90 / 40822 = 0.2% Sep 21 · 89 / 46554 = 0.2% Sep 22 · 95 / 50263 = 0.2%
May 4, 2026 90 days Sep 22, 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.

Javascript Library leaders

Tool % of launches % of category
#1 – jQuery 14.61% 35.57%
#2 – React Router 6.34% 15.45%
#3 – Motion 5.96% 14.52%
#4 – TanStack Router 4.12% 10.03%
#5 – Swiper 3.74% 9.11%
…
#44 ▲2 Mailcheck Current page 0.19% 0.45%

Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Javascript Library tool.Mailcheck is typically used alongside jQuery rather than instead of it.Among August launches it ranked #44 in Javascript Library, up from #46 in July. All 1313 in Javascript Library →

Often used with

Tool Sites
jQuery 7,338
WordPress 7,161
WPForms 6,741
Google Fonts 5,829
Elementor 5,218

Tools most often detected on the same sites as Mailcheck.

Recent launches we can show

89 of the 7,351 sites using Mailcheck are product launches we list individually. The other 7,262 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

Screenshot of Niyom - Habit Tracker, a launch using Mailcheck Niyom - Habit Tracker Sep 23, 2026 · score 7.3 Health Screenshot of roundcarpet, a launch using Mailcheck roundcarpet Sep 23, 2026 · score 5.1 E-commerce Screenshot of Royal Home Remodeling, a launch using Mailcheck Royal Home Remodeling Sep 18, 2026 · score 8.6 United States Screenshot of شركة امن وسلامة, a launch using Mailcheck شركة امن وسلامة Sep 18, 2026 · score 5.9 Screenshot of Digital Solution, a launch using Mailcheck Digital Solution Sep 16, 2026 · score 5.5 Marketing Screenshot of Benefits of Corporate Yoga Classes Dubai, a launch using Mailcheck Benefits of Corporate Yoga Classes Dubai Sep 16, 2026 · score 5.7 Screenshot of ProMatte, a launch using Mailcheck ProMatte Sep 15, 2026 · score 7.3 Bangladesh Screenshot of Complete Guide: Local Plumber in Epping, a launch using Mailcheck Complete Guide: Local Plumber in Epping Sep 15, 2026 · score 6.4 CURP en línea | Consulta, imprime y descarga tu CURP Sep 15, 2026 Developer Tools Screenshot of Instagram Caption Extractor, a launch using Mailcheck Instagram Caption Extractor Sep 12, 2026 · score 8.1 India Screenshot of Refurb sewa, a launch using Mailcheck Refurb sewa Sep 12, 2026 · score 8.1 India E-commerce Screenshot of Digifanto, a launch using Mailcheck Digifanto Sep 10, 2026 · score 5.9 Marketing

Showing the most recent 12 of 89.

The StackScope API serves all 7,351 sites using Mailcheck, filterable and exportable, from £15 a month.

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