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eM Client

eM Client is a Windows and Mac desktop email client with built-in calendar, contacts, tasks, notes, and chat, supporting Gmail, Outlook, Exchange, iCloud, and standard IMAP/POP3 — with a free personal license and one-time professional pricing.

Our take

eM Client earns attention primarily for two reasons: the permanent free license for two accounts is genuinely functional for personal use, and the paid version includes native Exchange ActiveSync — something Thunderbird requires a paid third-party add-on to achieve. For Windows users who want a Thunderbird-like desktop email experience with calendar and contacts integration, but at a lower friction level, eM Client is worth serious evaluation.

The honest trade-off is polish. eM Client is functional and well-featured, but its interface reflects its Eastern European origins (Prague-based) and has not been redesigned as aggressively as modern competitors. Users migrating from Gmail web often find the transition noticeable.

What stands out

All-in-one without paying. The free license handles email, calendar, contacts, tasks, and notes for up to two accounts — genuinely replacing three or four separate apps for personal use at zero cost.

Native Exchange ActiveSync. EAS support is built in. For users in Exchange environments, this avoids the Thunderbird + Owl add-on workaround and the associated annual Owl license.

PGP and S/MIME natively. Both encryption standards work without a separate plugin. For security-conscious desktop users who want encryption without Thunderbird’s steeper learning curve, eM Client is the easier path.

Where it falls short

The interface is functional but not modern. Users who care about email client aesthetics may find it dated. Performance on very large archives can also degrade — a known issue for power users with decade-long email histories.

Who should pick eM Client

Pick eM Client if you need a Windows or Mac desktop client with Exchange support, you use two or fewer accounts personally (free), or you want an all-in-one email + calendar + contacts application without a subscription. Skip it if interface polish is a priority, if you primarily use mobile, or if the Business plan price is not justified.

References

Pros

  • Free personal license for up to 2 accounts is one of the most generous permanent free tiers in desktop email
  • Unified application for email, calendar, contacts, tasks, and notes without needing multiple apps
  • Exchange ActiveSync support is native, unlike Thunderbird which requires a third-party add-on
  • PGP and S/MIME encryption built in, accessible without a separate plugin
  • One-time purchase option provides a perpetual license for users who prefer no recurring charges

Cons

  • The interface looks slightly dated compared to modern clients like Spark or Superhuman
  • Business plan at $111.95/year is expensive relative to its target market (small business desktop users)
  • The integrated chat feature uses XMPP, which is less relevant now than Slack or Teams integrations
  • iOS and Android apps are free but feature-limited compared to the desktop experience
  • Some users report sluggish performance on large email archives (50,000+ messages)

Features

  • Email with IMAP, POP3, Exchange ActiveSync (EAS), and CalDAV/CardDAV support
  • Integrated calendar with Google Calendar, Outlook, iCloud, and CalDAV sync
  • Contacts management with CardDAV and LDAP support
  • Tasks and notes organized alongside email in a unified interface
  • Chat: integrated XMPP and Google Talk messaging (legacy)
  • S/MIME and PGP email encryption
  • Snooze emails to reappear at a scheduled time
  • Email rules (local and server-side synchronized) with complex condition support
  • Spell check and automatic message translation
  • Zoom, Microsoft Teams, and Google Meet integration for calendar events
  • QuickText snippets for frequently used email phrases
  • Unified inbox for multiple accounts with per-account color coding

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