eM Client

eM Client: email and calendar client for desktop and mobile

eM Client is an email and calendar application available for Windows, macOS, Android, and iOS. The company was founded in Prague in 2007, although the project had begun in 2005, and its stated goal was to create a modern alternative to Outlook for businesses and individual users. The company estimates its user base at 4,000,000 personal customers and 100,000 business customers worldwide.

Productivity and email management features

The program integrates email, calendar and tasks, contacts, notes, and chat. Among the tools the company highlights are artificial intelligence, inbox categories, quick actions, message encryption, message translation, the ability to snooze incoming emails, and server synchronization of rules, signatures, and tags. The company also mentions integration with chat platforms and a redesigned search experience.

Compatibility with services and platforms

eM Client is presented as a tool compatible with any email service, and specifically mentions its integration with Google Workspace, Office 365, Outlook, Exchange, Gmail, iCloud, and IMAP. The company also notes support for cloud storage and online meetings, with the ability to start Zoom, Teams, or Meet directly from the calendar.

Security and privacy

The company states that data privacy and security are design priorities. Among the security capabilities it mentions are PGP and S/MIME encryption, protection against email tracking, and message encryption. These features are presented as part of the product versions, not as standalone services.

History and evolution of the product

The first public version for Windows appeared in 2007. Since then, the company has released successive versions with milestones such as Gmail integration and PST import in 2012, touch support and Exchange Web Services in 2013, PGP encryption and live backup in 2017, the interface redesign and cloud storage support in 2020, online meeting integration in 2021, privacy and anti-tracking features in 2022, and the arrival of artificial intelligence in version 10 in 2024. That same year the company introduced a subscription model alongside one-time license purchases, and in October 2024 it acquired Postbox Inc., later incorporating features such as profiles, account groups, single-key shortcuts, and QuickText replies. In 2025 it launched a full mobile app for iOS and Android with AI integration and an interface optimized for tablets.

Licensing model and editions

The company sells the product through subscription plans and one-time license purchases. Its catalog includes the upgrade to version 10, lifetime upgrades, additional licenses, VIP support, an extension, and AI add-ons with extra credits. It also offers a free license and a free download version.

Focus on businesses and teams

eM Client is presented as a solution for teams and businesses, with features designed to cover professional communication needs. The company has a partner program and press materials, and its headquarters is located at Thamova 18, Prague 8, 186 00, Czech Republic.

Location and contact

Thamova 18, Prague 8, 186 00 Czech Republic