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Postbox Logo
Postbox Growth Score
73
CB Rank
608367
Heat Score
40
Postbox is a power email application for macOS and Windows.
Acquired by
eM Client, Inc. Logo
eM Client, Inc.
Founded
obfuscation
Private San Francisco, California, United States1-10 www.postbox-inc.com
Email
Software
Overview

Postbox
Growth Score
73
Heat Score
40

Growth Score73
-10 pts
in past quarter
Heat Score 40
-4 pts
in past quarter

Company Performance Metrics

Score
Trend
AI Content may contain mistakes and is not legal, financial or investment advice.Learn more.
Growth Score - The measure of growth based on company activity, operational metrics, and investments
Growth Trend - The change in the growth score over the given time period
Heat Score - The measure of the market interest, media activity, and Crunchbase profile activity
Heat Trend - The change in the heat score over the given time period
Learn More >
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About Postbox

CB Rank
608367
Postbox is a power email application for macOS and Windows.
Acquired by
eM Client, Inc. Logo
eM Client, Inc.
Founded
obfuscation
Private San Francisco, California, United States1-10 www.postbox-inc.com
Email
Software

Key People

Details

Operating Status Active
Company Type For Profit
Founders  Sherman Dickman
About the Company
Postbox is a desktop email application for macOS and Windows. It's built for power users who send and receive high volumes of email. Based in the San Francisco Bay Area, Postbox has been hand-crafting fine email software since 2008.
Contact Email press@postbox-inc.com
Predictions & Insights

Growth Prediction

See this Growth Prediction

Products & Services

Postbox Email Application
An email client application for macOS and Windows that consolidates multiple email accounts and provides tools for email management and composition.
Quick Bar
A keyboard-driven command interface within Postbox for performing common email actions quickly, such as moving messages, switching folders, and inserting signatures or canned responses.

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Financials

M&A Details

Postbox was acquired by eM Client, Inc. on
obfuscation
.
Transaction Name 
Postbox acquired by eM Client, Inc. Logo
Postbox acquired by eM Client, Inc.
Acquired by 
eM Client, Inc. Logo
eM Client, Inc.
Announced Date 
obfuscation
Market Intelligence
People
View Profiles & Contacts
Headcount 1-10 Employee Profiles 1 Contacts 6

Employee Profiles

News

News and Press

News•Oct 8, 2025
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News•Oct 8, 2025
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News•May 5, 2025
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News•Oct 23, 2024
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Access a complete feed of recent news and press, from product launches to leadership changes.
Technology
View Tech Report

Monthly Web Visits

16,558
16.41%
 in past month

IT Spend

$1.5MThis year, Postbox is projected to spend $1.5M on IT, according to Aberdeen.

Actively Used Products

21Postbox uses 21 technology products and services including HTML5, GreenSock Animation Platform, and  Vimeo, according to G2 Stack.

Active Website Tech Count

28Postbox is actively using 28 technologies for its website, according to BuiltWith. These include IPhone / Mobile Compatible, Viewport Meta, and  HSTS.

Total IP

1Postbox has 1 registered trademark in the 'Scientific and electric apparatus and instruments' class, according to IPqwery.
Sub-Organizations
Frequently Asked Questions

Where is Postbox's headquarters? Postbox is located in San Francisco, California, United States.Who are Postbox's competitors? Alternatives and possible competitors to Postbox may include Superhuman, Nylas, and  Apple.
Who We Are
What We Do
Helpful Links
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