Postbox
Postbox is a San Francisco-based developer of a native desktop email client for macOS and Windows, serving productivity-focused individual users and business professionals managing multiple accounts. The company was acquired by eM Client in October 2024 and operates with a 1–10 person team.
- Company typePrivate
- Founded2008
- HeadquartersSan Francisco, United States
- Headcount1–10
- GTM typeB2C
- OfferingSoftware
What Postbox does
Postbox, Inc. is a San Francisco-based software company that developed and sold a native desktop email client application for macOS and Windows under the brand Postbox. The product is positioned as a "power email" client for productivity-focused individual users and business professionals managing multiple email accounts, offering features such as a Spotlight-style Quick Bar for keyboard-driven inbox navigation, Wonder Writer professional composition tools (including a CodeMirror-powered HTML Code View), a Theme Editor with 20+ professionally-designed theme packs, tag-based Topics organization, Quick Post routing to services like Slack, Todoist, Evernote, and Zapier, and multi-account unified inbox support across IMAP, POP, and SMTP protocols with OAuth2 authentication for Google accounts.
The application is distributed exclusively as a direct-to-consumer digital download from postbox-inc.com, with revenue generated through one-time perpetual desktop software licenses (a prior 1-year license tier was discontinued in December 2020). The company supported tens of major releases since 2008, with Postbox 7 (September 2019) representing the last major version prior to acquisition. The company operated with a small team (1–10 employees), held no disclosed outside funding, and was recognized in a 2019 Macworld review with a 4.5/5 rating.
On October 22, 2024, Postbox was acquired by eM Client, a competing email application provider, ending its independent operating status. Postbox Labs, the experimental product surface, was deprecated following the acquisition. Postbox, Inc. is GDPR-compliant for EU/UK users and supports a global install base via cross-platform distribution, with North America identified as a primary market.
Postbox firmographics
Firmographics- Name
- Postbox
- Legal name
- Postbox, Inc.
- Website
- https://postbox-inc.com
- Company type
- Private
- Founded year
- 2008
- Operating status
- Acquired
- Headcount range
- 1–10 employees
- Short description
- Postbox is a San Francisco-based developer of a native desktop email client for macOS and Windows, serving productivity-focused individual users and business professionals managing multiple accounts. The company was acquired by eM Client in October 2024 and operates with a 1–10 person team.
- Ownership category
- akta.pro rank
Postbox industry classification
Industry- Product category
- Email Client Software
- NAICS
- Software Publishers (513210)
- SIC
- Services-Prepackaged Software (7372)
- akta.pro primary industry
- Software/SaaS Subscriptions (Consumer & Prosumer) (CRAFAIAB)
Keywords
Where Postbox is headquartered
LocationHeadquarters
- HQ city
- San Francisco
- HQ country
- United States
- HQ region
- North America
Markets served
Postbox business model
Business model- GTM type
- B2C
- Offering type
- Software
- Cost components
- Personnel, Technology or R&D, Marketing or Sales, Infrastructure, Operations
Revenue model
- Desktop Software Licenses: Postbox generated revenue through sale of desktop email application licenses for macOS and Windows. The company previously offered 1-year license options which were discontinued in December 2020, suggesting a shift to perpetual licensing or subscription models.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| One time/ perpetual license | Multi-year contract | License-based pricing model |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels3 records
Postbox product offering
Product offeringCore offering
Postbox develops and sells a desktop email client application for macOS and Windows that consolidates multiple email accounts into a single interface. The product offers keyboard-driven triage tools (Quick Bar, Quick Actions), professional composition features (Wonder Writer, Code View), a customizable Theme Editor with theme packs, multi-account unified inbox, and integrations with productivity services such as Slack, Todoist, Evernote, and Zapier.
Product overview
Postbox is a unified desktop email client product for macOS and Windows, providing a single powerful application for managing multiple email accounts. The core Postbox application serves as the primary product offering, with various integrated sub-features and add-on components. Key sub-products include Wonder Writer (professional composition tools with HTML Code View), Quick Bar (Spotlight-like command center for email actions), Topics tagging system for message organization, Send and Archive for workflow automation, Quick Post for web service integration, Composition Goals for tracking writing metrics, and Image Effects for photo editing. Theme customization is available through professionally-designed Theme Packs and a built-in Theme Editor. The product supports all major email providers via IMAP/POP/SMTP protocols and has been acquired by eM Client in October 2024.
Differentiator
Problem solved
Functional benefit
Products and services
- Postbox A desktop email client application for macOS and Windows that provides unified multi-account email management with features such as Quick Bar, professional composition tools, customizable themes, and email triage. Sold via one-time desktop license to individual power users and business professionals.
- Postbox Theme Packs Professionally designed theme packs for the Postbox desktop email client (such as Valkyrie, Contempo, Holiday), further customizable through the built-in Theme Editor. Distributed as add-on content for the Postbox application.
Quantifiable outcome
- Faster email processing through Quick Bar and Quick Actions
- +1 more outcomes
Companies that use Postbox
Customer profileSegments2 records
Ideal customer profiles2 records
Postbox technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration15 records
Feature12 records
Postbox partnerships and signals
Strategic signalPartnerships
Three partnerships are on record, tiered core and moderate.
- eM ClientcorePostbox was acquired by eM Client in October 2024. This acquisition represents a strategic business combination where Postbox's desktop email technology and user base integrate with eM Client's email client portfolio.
- Quick Post Service Integrations (Zapier, IFTTT, Evernote, Todoist, Slack, Trello, Asana, Wunderlist, Basecamp, Box)moderatePostbox's Quick Post feature enables users to send email content directly to hundreds of web services. Integration partners include Zapier (workflow automation), IFTTT (automation), Evernote (note-taking), Todoist (task management), Slack (communication), and other services via email-based routing.
- GooglecorePostbox integrates with Google services through OAuth2 authentication, supporting Gmail and G Suite accounts. The application uses Google authorization services for identity verification and communicates via IMAP, POP, and SMTP protocols for email access.
Scale indicators2 records
Recent moves6 records
Expansion highlights3 records
Postbox competitors and assessment
Company assessmentMarket position
Competitive moat3 records
Key highlights6 records
Customer concentration
Postbox social profiles
Digital presencePostbox compliance and trust
Trust signalCompliance1 record
Postbox financial estimates
Financial estimateRevenue estimate
Valuation estimate
Postbox leadership team
Management profileNumber of profiles
Profiles1 record
Postbox funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Postbox M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Postbox
What does Postbox do?
Postbox develops and sells a desktop email client application for macOS and Windows that consolidates multiple email accounts into a single interface. The product offers keyboard-driven triage tools (Quick Bar, Quick Actions), professional composition features (Wonder Writer, Code View), a customizable Theme Editor with theme packs, multi-account unified inbox, and integrations with productivity services such as Slack, Todoist, Evernote, and Zapier.
Is Postbox a public or private company?
Postbox is a private company. It is classified as corporate owned and is currently acquired.
When was Postbox founded?
Postbox was founded in 2008. It employs 1 to 10 people.
Where is Postbox based?
Postbox is headquartered in San Francisco, United States, in the North America region.
How does Postbox make money?
One revenue line is on record: desktop Software Licenses.
Does Postbox have an API?
No public API is recorded for Postbox.
What industry is Postbox in?
Postbox's product category is Email Client Software. Its primary akta.pro industry code is CRAFAIAB, Software/SaaS Subscriptions (Consumer & Prosumer). Its NAICS code is 513210 and its SIC code is 7372.