About eM Client

A modern, high-⁠quality email client app born in Prague, built for the world.

eM Client started in Prague in 2007 with a clear vision: to create a modern, high-⁠quality email client app with a powerful set of features. Our ambition was to establish eM Client as a strong alternative to Outlook, which at the time was regarded as the clear market leader. Back then, there were no other independent email clients available for enterprises and we aimed to fill that gap.

eM Client has come a long way since then, becoming a true contender in the email client market, ready to go head-⁠to-⁠head with other major players. eM Client has been steadily growing, with 4,000,000 personal and 100,000 business customers worldwide. As of 2025, the eM Client app is fully available across all major platforms, including Android and iOS.

Above all, we prioritize privacy, data security, and broad compatibility with popular email providers and services.

4,000,000 Personal Customers
100,000 Business Customers
2007 Founded in
All Major Platforms Supported

What we stand for

Privacy first

Your inbox is yours alone. We design with privacy as a starting point, not an afterthought.

Data security

From PGP and S/MIME to anti mail tracking, security is woven into every release.

Broad compatibility

Works seamlessly with Gmail, Outlook, Exchange, iCloud, IMAP and the services you depend on.

Milestones

Two decades of building eM Client

From a 2005 idea between friends to a global email client trusted by millions.

9/2025

Full-⁠featured mobile app on iOS and Android

the complete eM Client experience - email, calendar, contacts, tasks, and notes - now in your pocket, with AI integration and a tablet-⁠optimized UI.

4/2025

Beloved Postbox features added

Brings popular Postbox features to eM Client, including profiles and account groups for smarter account management, plus productivity tools like one-⁠key shortcuts and QuickText replies.

10/2024

Postbox Inc. acquired

eM Client welcomed the Postbox community, expanding its reach and strengthening its position in the desktop email market.

7/2024

eM Client 10: Now with AI

A landmark release introducing AI-⁠powered composition, Quick Actions, chat platform integration, and a completely redesigned search experience.

7/2024

Subscription model introduced

eM Client introduces subscription plans alongside one-⁠time purchases, giving users more flexibility in how they license the product. All existing licenses remain valid.

3/2024

eM Client Mail for iOS & Android

the first mobile companion apps arrive, bringing eM Client's power beyond the desktop for the first time.

2/2022

eM Client 9.0

A privacy-⁠focused release with anti-⁠tracking, modern message list with thread view, and undo send, plus server-⁠side synchronization for rules, signatures and tags.

3/2021

eM Client 8.2

Online meeting integration made scheduling effortless. Launch Zoom, Teams, or Meet directly from your calendar.

6/2020

eM Client 8.0

A bold UI redesign paired with cloud storage support and eM Keybook, making email both more beautiful and more secure.

1/2019

eM Client for macOS

eM Client crossed the platform divide, bringing its full-⁠featured experience to macOS users for the first time.

6/2017

eM Client 7.1

Security went mainstream with easy-⁠to-⁠use PGP encryption and live backup, while calendar sharing made collaboration seamless.

7/2016

eM Client 7.0

A fresh look with dark theme, conversation view, and powerful new tools like QuickTexts, automatic translation, and delayed send.

12/2013

eM Client 6.0

Touch support, Exchange Web Services, and powerful new tools like the deduplicator marked a major leap in capability.

12/2012

eM Client 5.0

Hotmail integration, full backup capabilities, and automatic archiving rounded out a mature, reliable email experience.

3/2012

eM Client 4.0

Deep Gmail integration, PST import, and a redesigned calendar brought eM Client closer to users' everyday needs.

4/2011

eM Client company established

What began as a passion project became official. A group of enthusiastic programmers transformed into a company with a mission.

2/2011

eM Client 3.0

A completely new interface, advanced search with search folders, and full Google contacts sync set a new standard.

9/2010

eM Client presentation at DEMO Fall

eM Client is presented at the DEMO Fall 2010 conference in Silicon Valley, paving the way for its launch into the tech startup scene.

7/2009

eM Client 2.0

Auto-⁠discovery, drag-⁠and-⁠drop, and full S/MIME support made setup effortless and security first-⁠class.

2007

eM Client v1.0 for Windows

the very first public release. A new kind of email client built from the ground up for Windows, with a focus on simplicity and power.

2005

Where it all began

the founders met and started working on something great.