Postfix
Postfix is a free and open-source mail transfer agent (MTA) that routes and delivers email. Postfix is the default Mail Transfer Agent (MTA) in Ubuntu...Read more
Market Share of Postfix
Current Customer(s)
939
Market Share (Est.)
0.01%
Ranking
#32
Top Competitors and Alternatives of Postfix
The top three of Postfix’s competitors in the Hosted Email category are Microsoft Outlook with 40.28%, Microsoft Exchange Online with 39.59%, 1&1 Email with 4.05% market share.
Popular Comparisons
Top Competitors and Alternatives of Postfix
The top three of Postfix’s competitors in the Hosted Email category are Microsoft Outlook with 40.28%, Microsoft Exchange Online with 39.59%, 1&1 Email with 4.05% market share.
Postfix vs Microsoft Outlook
Postfix vs Microsoft Exchange Online
Postfix vs 1&1 Email
Postfix vs Strato
Postfix vs SiteGround Email Hosting
Postfix vs Zoho Mail
Postfix vs One.com Email Hosting
Postfix vs Rackspace Email
Customers of Postfix
Around the world in 2025, over 939 companies have started using Postfix as Hosted Email tool.
| Customers | Employee Range | City | Region | Country | Social Links |
|---|---|---|---|---|---|
| Xerox | 10,000+ | Norwalk | Connecticut | United States |     |
| IBM | 10,000+ | Armonk | New York | United States | |
| Constellation Software, Inc. | 10,000+ | Toronto | Ontario | Canada | |
| Thomas Jefferson University | 10,000+ | Philadelphia | Pennsylvania | United States | |
| Warner Bros. Entertainment | 10,000+ | Burbank | California | United States | |
| Ahold Delhaize | 10,000+ | Zaandam | North Holland | Netherlands | |
| Springer Nature | 10,000+ | London | England | United Kingdom | |
| Huntsville Hospital | 10,000+ | Huntsville | Alabama | United States | |
| Millicom | 10,000+ | Luxembourg | Luxembourg | Luxembourg | |
| Microsoft | 10,000+ | Redmond | Washington | United States | |
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Postfix Customers by Products and Services
The top three products and services offering customers that use Postfix for Hosted Email are Cloud Services (29), Cybersecurity (26), Software Development (26).
Customers
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Postfix Customers by Employee Size
The majority of Postfix's customers for the hosted-email category fall in the company size of 100 - 249 employees (172 companies), 20 - 49 employees (138 companies), 10,000+ employees (120 companies).
Employee Size
Postfix Customers by Geography
The top three geographies of Postfix for hosted-email are the United States with 334(50.76%), India with 89(13.53%), Canada with 41(6.23%) customers respectively.
Customers
Employees of Postfix
Also see other Products/Services by Postfix in:
FAQ
Find answers to the most often asked questions by users.
Who are the top Postfix competitors?
Postfix’s Top competitors in the hosted-email category are Microsoft Outlook, Microsoft Exchange Online, 1&1 Email. You can view a full list of Postfix competitors here. 6sense uses advanced data mining and AI algorithms to track customers and competitors of Postfix and 40,000 other technologies on the internet. You can also compare Postfix and its feature with top competitors here : Postfix vs Microsoft Outlook Postfix vs Microsoft Exchange Online Postfix vs 1&1 Email.
What is Postfix customer distribution based on company size?
What is Postfix market share in the hosted-email?
What are the top countries that use Postfix?
What are the top industries that use Postfix?
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