Companies using Postfix by Postfix in 2025
As of 2025, 1,678 verified companies use Postfix – across industries, company sizes, and geographies. This is real, verified data. Whether you’re looking to analyze the market, build a target list, or get a sales edge – this is your starting point.
What is Postfix?
Postfix by Postfix.org, is a widely-used open-source mail transfer agent (MTA). It routes and delivers electronic mail. It’s commonly used by IT departments across various industries to manage email infrastructure, ensuring reliable and secure email communication.
Last updated date
August 17, 2025
Number of Companies using
1,678
The majority are based in the
United States
Most common industry?
Business Services
Postfix’s sample user list in 2025
Company Name
Country
Industry
Employees
Revenue
Product
Walmart
United States
United States
Department Stores, Shopping Centers & Superstores
2098500
$681B
Postfix
We have data on 1,678 companies that use Postfix. Our Postfix customers list is available for download and comes enriched with vital company specifics, including industry classification, organizational size, geographical location, funding rounds, and revenue figures, among others.
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Postfix users and customers by country
United States
United Kingdom
2.6K Companies
France
2.6K Companies
Canada
2.6K Companies
Germany
2.6K Companies
Where Postfix Shows Up Most
Postfix is used across a wide range of sectors:
Business Services
Manufacturing
Software
Finance
Custom Software & IT Services
From lean startups to global enterprises, Postfix’s footprint is wide, and that means opportunity.
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FAQs
Contact UsHow latest this data is?
This data is updated on August 17, 2025
What is Postfix?
Postfix is a widely-used, open-source mail transfer agent (MTA) that routes and delivers electronic mail. It’s utilized by IT departments across various industries to manage email infrastructure, ensuring reliable and secure email communication.
How many companies are using Postfix in 2025?
As of 2025, there are 1,678 verified companies using Postfix.
What kind of data is available about companies using Postfix?
The data includes company specifics such as industry classification, organizational size, geographical location, funding rounds, and revenue figures.
Which country uses Postfix the most?
The United States uses Postfix more than any other country.
Which industries are most likely to use Postfix?
Business Services, Manufacturing, and Software industries are among the top users of Postfix.