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Postfix

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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

Hosted Email
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Market Share of Postfix

Current Customer(s)

952

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 40.46%, Microsoft Exchange Online with 39.66%, 1&1 Email with 3.95% market share.

TechnologyDomainsMarket Share (Est.)Versus page
Microsoft Outlook386760640.46%Postfix vs Microsoft Outlook
Microsoft Exchange Online379061039.66%Postfix vs Microsoft Exchange Online
1&1 Email3776503.95%Postfix vs 1&1 Email
SiteGround Email Hosting2822182.95%Postfix vs SiteGround Email Hosting
Strato2812352.94%Postfix vs Strato
Zoho Mail2132852.23%Postfix vs Zoho Mail
One.com Email Hosting1582381.66%Postfix vs One.com Email Hosting
Rackspace Email1135141.19%Postfix vs Rackspace Email
Namecheap Private Email771600.81%Postfix vs Namecheap Private Email
Network Solutions Email766110.80%Postfix vs Network Solutions Email
GandiMail494610.52%Postfix vs GandiMail
Infomaniak E-mail456650.48%Postfix vs Infomaniak E-mail
Yandex Mail414830.43%Postfix vs Yandex Mail
ProtonMail263900.28%Postfix vs ProtonMail
United Domains Email192370.20%Postfix vs United Domains Email
FastMail184710.19%Postfix vs FastMail
Names Email Hosting177560.19%Postfix vs Names Email Hosting
123-reg Email Hosting175110.18%Postfix vs 123-reg Email Hosting
Soverin173770.18%Postfix vs Soverin
Aliyun Mail159390.17%Postfix vs Aliyun Mail
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Popular Comparisons

Top Competitors and Alternatives of Postfix

The top three of Postfix’s competitors in the Hosted Email category are Microsoft Outlook with 40.46%, Microsoft Exchange Online with 39.66%, 1&1 Email with 3.95% market share.

Postfix vs Microsoft Outlook

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Postfix vs Microsoft Exchange Online

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Postfix vs 1&1 Email

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Postfix vs SiteGround Email Hosting

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Postfix vs Strato

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Postfix vs Zoho Mail

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Postfix vs One.com Email Hosting

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Postfix vs Rackspace Email

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Customers of Postfix

Around the world in 2025, over 920 companies have started using Postfix as Hosted Email tool.

CustomersEmployee RangeCityRegionCountrySocial Links
CMS Info Systems10,000+MumbaiMaharashtraIndia
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Macy's10,000+New York CityNew YorkUnited States
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University Of Missouri10,000+EstherMissouriUnited States
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Telia10,000+SolnaStockholmSweden
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Robert Half10,000+Menlo ParkCaliforniaUnited States
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Principal Financial Group10,000+Des MoinesIowaUnited States
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CAE, Inc.10,000+Saint-LaurentQuebecCanada
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Carnival10,000+DoralFloridaUnited States
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Xerox10,000+NorwalkConnecticutUnited States
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Institut Teknologi Bandung10,000+BandungWest JavaIndonesia
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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 (30), Software Development (29), Cybersecurity (24).

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 (207 companies), 20 - 49 employees (164 companies), 10,000+ employees (138 companies).

Employee Size

Postfix Customers by Geography

The top three geographies of Postfix for hosted-email are the United States with 332(51.31%), India with 88(13.60%), United Kingdom with 38(5.87%) customers respectively.

Customers

Employees of Postfix

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Also see other Products/Services by Postfix in:

Hosted Email

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.

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What is Postfix customer distribution based on company size?

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What is Postfix market share in the hosted-email?

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What are the top countries that use Postfix?

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What are the top industries that use Postfix?

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