quietmoneyPostmarkapp
Developer-focused transactional email service: send verification codes, notifications and similar emails via API/SMTP, with support for marketing email and inbound parsing too.
Philadelphia deOne-line growth story, compiled by us from public sources; speculation is marked separately below.
Checkout visits over time
Checkout: invoice.stripe.com
1. Productwhat it sells, to whom, and how it charges
- Product
- Developer-focused transactional email service: send verification codes, notifications and similar emails via API/SMTP, with support for marketing email and inbound parsing too.
- Users
- SaaS developers and startup teams that need reliable transactional email delivery
- Positioning
- A veteran transactional email service known for deliverability and speed, competing with SendGrid and Mailgun
- Pricing
- Free trial; from $15/month (10,000 emails) Billing: subscription Free tier: no Source: Existing
- Prices on site
- $15/mo (10,000 emails)
- Team
- small team
- Acquisition entry points on site
- Discord community
“Try Postmark free ... No Credit Card Required / $15 per month for 10,000 emails / one of my heroes in the bootstrapped world”Quote from the site
2. Channelswhere new users come from and what the traffic looks like
New-user source: Other (Direct / referral / email / paid). Direct 83.5%, search 15.7%, brand keywords 96.1% (postmark, postmark login), also picking up the competitor term mailgun. Referrals from tailwindcss.com 6.05%, getrewardful.com 5.77%, atlassian.net 5.77%; ChatGPT brings 0.42%. Mostly existing customers returning directly to the dashboard.
Last month's traffic sources
Semrush source breakdown (desktop)
Five-class attribution
| Attributable new users, last month | Share |
|---|---|
| SEO | 3% |
| GEO | 0% |
| Other | 96% |
Direct + brand search 96%. Direct and brand search count as viral only when the site shows sharing mechanics; the largest share wins, under 5% means Other.
Countries
| Country | Share of visits |
|---|---|
| United States | 40.5% |
| United Kingdom | 11.49% |
| Canada | 4.54% |
| Netherlands | 4.53% |
| India | 3.82% |
Countries (Semrush): Bangladesh 23.5%, United States 13.0%, United Kingdom 7.6%, Netherlands 5.3%, Germany 4.0%
Language
English
Social sources
YouTube, X (Twitter), Telegram Webapp; Messaging: Telegram
AI assistants
| Source | Share |
|---|---|
| ChatGPT | 0.42 |
| Claude | 0.04 |
| l.meta.ai | 0.04 |
AI referrals (Semrush): ChatGPT 3,342 (0.42%), Claude 305 (0.04%), l.meta.ai 294 (0.04%), Perplexity 198 (0.03%), campus.ai 177 (0.02%)
Keywords
1.5K keywords · brand ~96% · organic 75.81% / paid 24.19%
| Similarweb top 5 keywords |
|---|
| postmark |
| mailgun |
| postmark login |
| postmark email |
| postmarkapp |
Non-brand queries: mailgun
Referring sites
16 referring sites
| Site | Share of referrals |
|---|---|
| tailwindcss.com | 6.05% |
| getrewardful.com | 5.77% |
| atlassian.net | 5.77% |
Referrer categories
| Category | Share of referrals |
|---|---|
| Graphics Multimedia and Web Design | 28.75% |
| Programming and Developer Software | 20.41% |
| Computers Electronics and Technology - Other | 5.79% |
| Government | 5.77% |
Site metrics (Similarweb, last month)
- Visits, last 3 months
- 586.2K (3 months)
- Visits MoM
- -4.92%
- Country rank
- United States #34473
- Category rank
- Computers Electronics and Technology - Other #820
- Bounce rate
- 29.92%
- Pages / visit
- 5.89
- Visit duration
- 00:05:16
- Industry
- Computers Electronics and Technology
- Top 3 channels
- Direct › Organic Search › Paid Search (top channel 67.25%)
- Semrush monthly visits
- 3 months ago 695,174 · 2 months ago 708,827 · Last month 790,705 Semrush scale, ~3–4× Similarweb
- Semrush organic / paid search visits
- 40,292 / 2,831
- Semrush source breakdown (desktop)
- Direct 75.2%, google.com · Google organic 14.1%, chatgpt.com 0.5%, mail.google.com 0.3%
3. Growth pathhow the first users arrived and what kept it growing
Classification
Basics
Timeline
Growth loop
Revenue and scale clues
Confidence and gaps
Other sites that started via “Existing audience”
Similar sitessame category, also growing via Other
FAQ
How many checkout visits does Postmarkapp get per month?
About 10,969 last month (Similarweb estimate), #318 of 606; the month before was 13,314. Opening checkout is not paying, so this is not revenue.
Where do Postmarkapp's new users come from?
New-user source: Other (Direct / referral / email / paid). Mostly referrals, email or paid, or mostly direct with no clear source Direct 83.5%, search 15.7%, brand keywords 96.1% (postmark, postmark login), also picking up the competitor term mailgun. Referrals from tailwindcss.com 6.05%, getrewardful.com 5.77%, atlassian.net 5.77%; ChatGPT brings 0.42%. Mostly existing customers returning directly to the dashboard.
How much does Postmarkapp cost?
Free trial; from $15/month (10,000 emails)
Dossier confidence: high. Parts 1 and 2 come from reading the site and Similarweb data; part 3 from public reporting, founder posts, Wayback snapshots, WHOIS and similar, with speculation marked.
The number: checkout visits is Similarweb's estimate of visits from the site to a checkout payment page; opening checkout is not paying, so this is not revenue. Small sites land on fixed buckets.
Data through last month. Page updated 2026-10-26.