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Postmark

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Postmark provides transactional email delivery for web apps with minimal setup time and maintenance.

Transactional Email
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Market Share of Postmark

Current Customer(s)

97

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 21.11%, Mailgun with 17.25%, Mailchimp Transactional Email (formerly Mandrill) with 16.76% market share.

TechnologyDomainsMarket Share (Est.)Versus page
SendGrid23124321.11%Postmark vs SendGrid
Mailgun18897417.25%Postmark vs Mailgun
Mailchimp Transactional Email (formerly Mandrill)18355416.76%Postmark vs Mailchimp Transactional Email (formerly Mandrill)
Amazon SES14373313.12%Postmark vs Amazon SES
Mailjet1077599.84%Postmark vs Mailjet
SendinBlue953278.70%Postmark vs SendinBlue
Constant Contact746016.81%Postmark vs Constant Contact
Elastic Email567005.18%Postmark vs Elastic Email
ClickDimensions62940.57%Postmark vs ClickDimensions
Doppler Relay27880.25%Postmark vs Doppler Relay
JangoSMTP15590.14%Postmark vs JangoSMTP
Everlytic5860.05%Postmark vs Everlytic
Mandrill5490.05%Postmark vs Mandrill
Movable Ink5070.05%Postmark vs Movable Ink
Vero1760.02%Postmark vs Vero
Postage App1690.02%Postmark vs Postage App
Sendwithus760.01%Postmark vs Sendwithus
MessageGears630.01%Postmark vs MessageGears
Inxmail620.01%Postmark vs Inxmail
Leadersend570.01%Postmark vs Leadersend
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Popular Comparisons

Top Competitors and Alternatives of Postmark

The top three of Postmark’s competitors in the Transactional Email category are SendGrid with 21.11%, Mailgun with 17.25%, Mailchimp Transactional Email (formerly Mandrill) with 16.76% market share.

Postmark vs SendGrid

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Postmark vs Mailgun

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Postmark vs Mailchimp Transactional Email (formerly Mandrill)

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Postmark vs Amazon SES

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Postmark vs Mailjet

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Postmark vs SendinBlue

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Postmark vs Constant Contact

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Postmark vs Elastic Email

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Customers of Postmark

Around the world in 2025, over 97 companies have started using Postmark as Transactional Email tool.

CustomersEmployee RangeCityRegionCountrySocial Links
Sage10,000+Newcastle upon TyneEnglandUnited Kingdom
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NetApp10,000+SunnyvaleCaliforniaUnited States
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ATI Physical Therapy5,000 - 9,999BolingbrookIllinoisUnited States
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ActiveCampaign1,000 - 4,999ChicagoIllinoisUnited States
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Kilo Health500 - 999VilniusVilniusLithuania
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Kreydle Sdn Bhd500 - 999Petaling JayaSelangorMalaysia
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Empire Auto Parts500 - 999TotowaNew JerseyUnited States
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Wave250 - 499TorontoOntarioCanada
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Venture Garden Group250 - 499LagosLagosNigeria
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Synup250 - 499New York CityNew YorkUnited States
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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), Software (3), Saas (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 (25 companies), 0 - 9 employees (18 companies), 100 - 249 employees (11 companies).

Employee Size

Postmark Customers by Geography

The top three geographies of Postmark for transactional-email are the United States with 51(58.62%), United Kingdom with 11(12.64%), Canada with 5(5.75%) customers respectively.

Customers

Employees of Postmark

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Also see other Products/Services by Postmark in:

Email Deliverability
Transactional Email

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).

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What is Postmark customer distribution based on company size?

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What is Postmark market share in the transactional-email?

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What are the top countries that use Postmark?

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What are the top industries that use Postmark?

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