Postmark
Postmark provides transactional email delivery for web apps with minimal setup time and maintenance.
Market Share of Postmark
Current Customer(s)
230
Market Share (Est.)
0.08%
Ranking
#15
Top Competitors and Alternatives of Postmark
The top three of Postmark’s competitors in the Transactional Email category are Constant Contact with 30.44%, SendGrid with 14.45%, Amazon SES with 13.97% market share.
| Technology | Domains | Market Share (Est.) | Versus page |
|---|---|---|---|
| Constant Contact | 83581 | 30.44% | Postmark vs Constant Contact |
| SendGrid | 39676 | 14.45% | Postmark vs SendGrid |
| Amazon SES | 38353 | 13.97% | Postmark vs Amazon SES |
| SendinBlue | 26541 | 9.67% | Postmark vs SendinBlue |
| Mailgun | 25774 | 9.39% | Postmark vs Mailgun |
| Mailchimp Transactional Email (formerly Mandrill) | 23768 | 8.66% | Postmark vs Mailchimp Transactional Email (formerly Mandrill) |
| Mailjet | 20098 | 7.32% | Postmark vs Mailjet |
| Elastic Email | 7720 | 2.81% | Postmark vs Elastic Email |
| ClickDimensions | 4530 | 1.65% | Postmark vs ClickDimensions |
| Mandrill | 1428 | 0.52% | Postmark vs Mandrill |
| Movable Ink | 840 | 0.31% | Postmark vs Movable Ink |
| Vero | 525 | 0.19% | Postmark vs Vero |
| JangoSMTP | 285 | 0.10% | Postmark vs JangoSMTP |
| Inxmail | 278 | 0.10% | Postmark vs Inxmail |
| Everlytic | 185 | 0.07% | Postmark vs Everlytic |
| Doppler Relay | 176 | 0.06% | Postmark vs Doppler Relay |
| Sendwithus | 114 | 0.04% | Postmark vs Sendwithus |
| ClickSend | 106 | 0.04% | Postmark vs ClickSend |
| MessageGears | 86 | 0.03% | Postmark vs MessageGears |
| Sarv TES | 55 | 0.02% | Postmark vs Sarv TES |
Popular Comparisons
Top Competitors and Alternatives of Postmark
The top three of Postmark’s competitors in the Transactional Email category are Constant Contact with 30.44%, SendGrid with 14.45%, Amazon SES with 13.97% market share.
Postmark vs Constant Contact
Postmark vs SendGrid
Postmark vs Amazon SES
Postmark vs SendinBlue
Postmark vs Mailgun
Postmark vs Mailchimp Transactional Email (formerly Mandrill)
Postmark vs Mailjet
Postmark vs Elastic Email
Customers of Postmark
Around the world in 2026, over 229 companies have started using Postmark as Transactional Email tool.
| Customers | Employee Range | City | Region | Country | Social Links |
|---|---|---|---|---|---|
| Huawei Technologies | 10,000+ | Shenzhen | Guangdong | People's Republic of China |     |
| Livestream | 10,000+ | New York City | New York | United States | |
| StarTek | 10,000+ | Denver | Colorado | United States | |
| Farmers Insurance | 10,000+ | Woodland Hills | California | United States | |
| DronaHQ | 10,000+ | Mumbai | Maharashtra | India | |
| Barracuda | 10,000+ | Campbell | California | United States | |
| IKEA | 10,000+ | Delft | South Holland | Netherlands | |
| Sage | 10,000+ | Newcastle upon Tyne | England | United Kingdom | |
| Cimpress | 10,000+ | Dundalk | Maryland | United States | |
| Upwork | 10,000+ | San Francisco | California | United States | |
Uncover hidden demand and identify accounts ready to buy with 6sense Intent Data.
Postmark Customers by Products and Services
The top three products and services offering customers that use Postmark for Transactional Email are Software Development (11), Web Development (10), Saas (9).
Customers
Download the 6sense Chrome Extension to get verified contact data of Postmark employees
Install Now
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 (62 companies), 100 - 249 employees (52 companies), 0 - 9 employees (39 companies).
Employee Size
Postmark Customers by Geography
The top three geographies of Postmark for transactional-email are the United States with 135(67.84%), United Kingdom with 17(8.54%), Canada with 14(7.04%) 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 Constant Contact, SendGrid, Amazon SES. 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 Constant Contact Postmark vs SendGrid Postmark vs Amazon SES.
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?
Get everything in one place
Close deals faster by understanding your clients well. Know their technology stack, contract renewal date, top decision-makers, hiring trends, and top company news in one place.
Get a demoInterested in 6sense for your organization?
Book a Demo
