Postmark
Postmark provides transactional email delivery for web apps with minimal setup time and maintenance.
Market Share of Postmark
Current Customer(s)
99
Market Share (Est.)
0.01%
Ranking
#17
Top Competitors and Alternatives of Postmark
The top three of Postmark’s competitors in the Transactional Email category are SendGrid with 21.09%, Mailgun with 17.24%, Mailchimp Transactional Email (formerly Mandrill) with 16.74% market share.
| Technology | Domains | Market Share (Est.) | Versus page |
|---|---|---|---|
| SendGrid | 231353 | 21.09% | Postmark vs SendGrid |
| Mailgun | 189077 | 17.24% | Postmark vs Mailgun |
| Mailchimp Transactional Email (formerly Mandrill) | 183570 | 16.74% | Postmark vs Mailchimp Transactional Email (formerly Mandrill) |
| Amazon SES | 143872 | 13.12% | Postmark vs Amazon SES |
| Mailjet | 107910 | 9.84% | Postmark vs Mailjet |
| SendinBlue | 95746 | 8.73% | Postmark vs SendinBlue |
| Constant Contact | 75040 | 6.84% | Postmark vs Constant Contact |
| Elastic Email | 56716 | 5.17% | Postmark vs Elastic Email |
| ClickDimensions | 6330 | 0.58% | Postmark vs ClickDimensions |
| Doppler Relay | 2788 | 0.25% | Postmark vs Doppler Relay |
| JangoSMTP | 1559 | 0.14% | Postmark vs JangoSMTP |
| Everlytic | 588 | 0.05% | Postmark vs Everlytic |
| Mandrill | 548 | 0.05% | Postmark vs Mandrill |
| Movable Ink | 530 | 0.05% | Postmark vs Movable Ink |
| Vero | 180 | 0.02% | Postmark vs Vero |
| Postage App | 169 | 0.02% | Postmark vs Postage App |
| Sendwithus | 76 | 0.01% | Postmark vs Sendwithus |
| MessageGears | 64 | 0.01% | Postmark vs MessageGears |
| Inxmail | 61 | 0.01% | Postmark vs Inxmail |
| Leadersend | 57 | 0.01% | Postmark vs Leadersend |
Popular Comparisons
Top Competitors and Alternatives of Postmark
The top three of Postmark’s competitors in the Transactional Email category are SendGrid with 21.09%, Mailgun with 17.24%, Mailchimp Transactional Email (formerly Mandrill) with 16.74% market share.
Postmark vs SendGrid
Postmark vs Mailgun
Postmark vs Mailchimp Transactional Email (formerly Mandrill)
Postmark vs Amazon SES
Postmark vs Mailjet
Postmark vs SendinBlue
Postmark vs Constant Contact
Postmark vs Elastic Email
Customers of Postmark
Around the world in 2025, over 99 companies have started using Postmark as Transactional Email tool.
| Customers | Employee Range | City | Region | Country | Social Links |
|---|---|---|---|---|---|
| Northern Belle | 100 - 249 | Nantwich | England | United Kingdom |     |
| West Coast Railway Company Ltd | 50 - 99 | Carnforth | England | United Kingdom | |
| Learning The Harp | 50 - 99 | Cape Town | Western Cape | South Africa | |
| WP Desk | 20 - 49 | Warsaw | Mazovia | Poland | |
| Ultiworld | 20 - 49 | Brooklyn | New York | United States | |
| WP Desk | 20 - 49 | Warsaw | Mazovia | Poland | |
| Eli's Pizza | 10 - 19 | Borehamwood | England | United Kingdom | |
| Surge Networks | 10 - 19 | Hong Kong | Hong Kong SAR | People's Republic of China | |
| Servertastic | 0 - 9 | Scarborough | England | United Kingdom | |
| Musicplay | 0 - 9 | Red Deer | Alberta | Canada | |
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Postmark Customers by Products and Services
The top three products and services offering customers that use Postmark for Transactional Email are Artificial Intelligence (4), Saas (3), Software (3).
Customers
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Postmark Customers by Employee Size
The majority of Postmark's customers for the transactional-email category fall in the company size of 20 - 49 employees (24 companies), 0 - 9 employees (18 companies), 100 - 249 employees (12 companies).
Employee Size
Postmark Customers by Geography
The top three geographies of Postmark for transactional-email are the United States with 52(58.43%), United Kingdom with 12(13.48%), Canada with 5(5.62%) customers respectively.
Customers
Employees of Postmark
Also see other Products/Services by Postmark in:
FAQ
Find answers to the most often asked questions by users.
Who are the top Postmark competitors?
Postmark’s Top competitors in the transactional-email category are SendGrid, Mailgun, Mailchimp Transactional Email (formerly Mandrill). You can view a full list of Postmark competitors here. 6sense uses advanced data mining and AI algorithms to track customers and competitors of Postmark and 40,000 other technologies on the internet. You can also compare Postmark and its feature with top competitors here : Postmark vs SendGrid Postmark vs Mailgun Postmark vs Mailchimp Transactional Email (formerly Mandrill).
What is Postmark customer distribution based on company size?
What is Postmark market share in the transactional-email?
What are the top countries that use Postmark?
What are the top industries that use Postmark?
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