Source: MrrTrack model
Estimated active users × assumed paying share × estimated monthly revenue per customer. We distinguish B2B, B2C and creator tools, and use comparable revenue when available. These are model assumptions, not measured sales.
Indicative range $45k–$720k
Share of monthly visits
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A simple but powerful SMTP service for sending transactional email from your web application.
Updated: 09/01/2026
Share calculated from Meta's reported reach breakdown. Spend by country is not published.
Traffic, revenue and acquisition: the data behind the product.
Catalog updated on
A simple but powerful SMTP service for sending transactional email from your web application.
Official website postmarkapp.comSMTP | API receives an estimated 586,151 visits in September 2026.
This represents a change of -4.9% compared with August 2026 (616,483 visits).
These are estimated visits, not unique users or paying customers. Traffic growth does not establish sales growth.
| Month | Visits |
|---|---|
| 547,547 | |
| 616,483 | |
| 586,151 |
SMTP | API has an estimated monthly revenue of $180,000. This is an estimate, not company-reported revenue or payment-verified MRR.The model uses available product, traffic and comparable SaaS signals; its assumptions remain uncertain.
The leading countries for visits to SMTP | API are: United States (40.5%), United Kingdom (11.5%), Canada (4.5%). These shares describe website traffic, not the location of paying customers.
The recorded channels include: Direct (67.3%), Email (4.3%), Referrals (2.1%).Coverage may be partial: a missing value does not establish that a channel is unused. These visits do not measure conversions or advertising returns.
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Explore acquisition dataThe selection of SaaS to compare includes SMTPkit, Sendlayer, Cloudpanel.Similarity is assessed from available descriptions, categories and use cases. It does not guarantee equivalent features or pricing.
Answers based on the data available in this profile.
SMTP | API receives an estimated 586,151 visits in September 2026. These are estimated visits, not unique users or paying customers. Traffic growth does not establish sales growth.
SMTP | API has an estimated monthly revenue of $180,000. This is an estimate, not company-reported revenue or payment-verified MRR.The model uses available product, traffic and comparable SaaS signals; its assumptions remain uncertain.
This represents a change of -4.9% compared with August 2026 (616,483 visits). These are estimated visits, not unique users or paying customers. Traffic growth does not establish sales growth.
The leading countries for visits to SMTP | API are: United States (40.5%), United Kingdom (11.5%), Canada (4.5%). These shares describe website traffic, not the location of paying customers.
The selection of SaaS to compare includes SMTPkit, Sendlayer, Cloudpanel.Similarity is assessed from available descriptions, categories and use cases. It does not guarantee equivalent features or pricing.
The catalog data was last updated on October 6, 2026.The latest available traffic month is September 2026.Traffic periods, collection dates and revenue source dates can differ.