Postmark on new websites
ActiveCampaign Postmark transactional email API.
1,275 sites
1,065 found by StackScope, 210 via launch platforms
- StackScope Wider Web 673
- StackScope Discovery (Indie) 392
- Product Hunt 152
- PeerPush 27
- Hacker News 20
- Other 11
Postmark appeared on about 370 new sites in the last 30 days.
These figures cover websites that went live since April 2026, not the web as a whole.
Get told when a new site ships with Postmark.
372 new sites with Postmark first seen in the last 30 days.
Stackdar watches every launch we detect and sends you the ones using Postmark, by email, Slack or webhook. On every plan, from £15 a month.
See how alerts workShare of new sites using Postmark
Each dot is one launch day. Line is the 7-day rolling average; weekly averages before July 2026.
The shaded areas were measured against a different set of sites, so the line can step there without Postmark itself changing.
Coverage details
Before the dashed line where the dots begin, the line is a weekly average. After it, the last 90 days are shown one day at a time.
Grey: before 8 July 2026, we only tracked launches from launch platforms. From that date we crawl the wider web as well.
Amber: 8 July to 10 September 2026, before we improved our infrastructure to index new sites much sooner, often on the day they go live. Sites found that early often haven't finished setting up, so anything usually added after launch reads lower from 10 September. We record each site as it was when we found it.
The share is a proportion of whatever we were tracking at the time. For a single continuous measure, switch to launch platforms.
What kind of sites use Postmark
467 sites with a known type, all time
Domain endings using Postmark
1,275 sites, all time
- .com 58.0%
- .app 7.0%
- .ai 5.4%
- .io 5.4%
- .net 3.2%
- .org 2.9%
- .uk 2.8%
- .co 2.0%
- .nz 1.6%
- .ca 1.2%
- .pl 1.2%
- .se 1.1%
- .fr 0.9%
- .dev 0.9%
- .online 0.6%
Country
Country known for 155 of 1,275 sites (12.2%), all time.
How we know
Country comes from what each site says about itself, such as a company registration, legal terms or a phone number, not just its domain ending. We count a country only where it is stated plainly enough to be sure: a governing-law clause or company registration number on a legal page, a phone country code, or a country domain ending. Sites that publish none are not counted at all.
-
United States
52.3%
-
United Kingdom
16.1%
-
France
6.5%
-
Poland
3.9%
-
Canada
3.2%
-
Australia
2.6%
-
Switzerland
1.9%
-
India
1.9%
-
Sweden
1.9%
-
Serbia
1.3%
-
Austria
0.7%
-
Bulgaria
0.7%
-
Czechia
0.7%
-
Germany
0.7%
-
Estonia
0.7%
Green hosting
210 checked sites since Apr 2026.
What this means
The share whose web host The Green Web Foundation lists as running on green energy, against the average for every new site we checked.
- Postmark 49%
- Average 47%
Transactional Email leaders
| Tool | % of sitesall time | % of categoryall time | ||
|---|---|---|---|---|
| #1 | – |
Resend
|
4.2% | 58.6% |
| #2 | ▼1 |
SendGrid
|
0.5% | 7.2% |
| #3 | ▼2 |
Amazon SES
|
0.5% | 7.0% |
| #4 | ▲2 |
MailChannels
|
0.5% | 6.8% |
| #5 | ▲1 |
Mail.Baby
|
0.4% | 5.5% |
| … | ||||
| #16 | – |
Postmark
Current page
|
<0.1% | 0.3% |
Percentages show all-time adoption across the new sites we track: the share of all of them, and of the sites using any Transactional Email tool.The most common alternatives to Postmark on new websites are Resend and Amazon SES. All 172 in Transactional Email →
Often used with
| Tool | Sites | vs all new sites |
|---|---|---|
Google Ads
|
341 | 9.9x |
Google Analytics
|
471 | 3.6x |
Google Tag Manager
|
479 | 3.2x |
Google Search Console
|
624 | 2.6x |
Tools that turn up far more often on Postmark sites than on new sites in general, and how many times as common each one is there.
Recent launches using Postmark
602 of the 1,275 sites using Postmark are product launches we list individually. The other 673 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. They are included in the StackScope API and in Stackdar alerts. How StackScope Discovery works
Job Start List: new jobs from building permits, ranked for your trade
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Polytranslator
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Sarah — the AI career agent that applies to jobs for you | JobGap
Also detected
Keep the recipe, lose the life story - RecipeSync
Also detected
CommonSchema | One API for banking, payments and crypto data
Also detected
FrontCite
Also detected
Mailhook - Programmable Temp Inboxes for AI Agents
Also detected
Deal Current | Ad Viewability & Media Quality Measurement — New York
Also detected
FitForge
Also detected
Sans Amiante - Trouvez une entreprise de désamiantage
Also detected
Debarrago - Comparez les entreprises de débarras de votre ville
Also detected
Showing the most recent 12 of 602.
The StackScope API serves all 1,275 sites using Postmark, filterable and exportable, from £15 a month.