KMail vs eM Client

KMail8.9Visit eM Client8.8Visit

Higher score KMail #5 in Email Clients 8.9/10 Free plan Free plan✓ 4 of 4 features Visit KDE

vs

eM Client #6 in Email Clients 8.8/10 Free plan · 30-day trial Free planFree trial✓ 4 of 4 features Visit eM Client

• KMail fits best

  Linux users wanting a mature open-source client

• eM Client fits best

  Users wanting broad productivity integrations

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Side by side

Feature	KMail 8.9/10 Visit ↗	eM Client 8.8/10 Visit ↗
At a glance
Editor score	8.9	8.8
Ranking	#5 in Email Clients	#6 in Email Clients
Best for	Linux users wanting a mature open-source client	Users wanting broad productivity integrations
Pricing model	Free	Free plan + paid
Starting price	Free plan	$39.95/user/yr
Free plan	✓	✓
Free trial	—	30 days
Deployment	Desktop	Desktop, Mobile
Platforms	Linux	Windows, macOS, iOS, Android
Support	Email, Live chat, Community, Docs	Email, Community
Integrations	4 integrations	15 integrations
Built for	Solo, Small business, Mid-market	Solo, Small business, Mid-market, Enterprise
Features KMail 4/4 · eM Client 4/4
Unified inbox	✓	✓
Offline access	✓	✓
Scheduled sending	✓	✓
Calendar tools	✓	✓
Specs
App coverage	Desktop	All
Account limit	Not checked yet	2 accounts
Our review
Pros	Supports IMAP, POP3, SMTP and Microsoft Exchange OpenPGP, PGP/MIME and S/MIME support Offline access, filtering, search and scheduled sending	Unified inbox supports multiple email accounts Works across Windows, macOS, iOS and Android Includes encryption, offline access, calendars and AI assistance
Cons	Available on Linux rather than across multiple operating systems Unified mailbox requires a plugin disabled by default Desktop-focused app coverage	Free license is limited to two email accounts Free license is for personal, non-commercial use Its broad feature set may exceed email-only needs
Our verdict	KMail is an open-source desktop email client developed within the KDE community. It is designed for Linux users who want a configurable application for managing multiple mail accounts locally. The client supports IMAP, POP3, SMTP and… Read the review →	eM Client is an email client for individuals, freelancers and businesses who want email, calendars, tasks, contacts, notes and chat in one application. It connects with Gmail, Google Workspace, Microsoft 365, Exchange, Outlook, iCloud,… Read the review →

Strengths and trade-offs

• KMail — where it wins

  • Supports IMAP, POP3, SMTP and Microsoft Exchange
  • OpenPGP, PGP/MIME and S/MIME support
  • Offline access, filtering, search and scheduled sending

  Where it doesn't

  • Available on Linux rather than across multiple operating systems
  • Unified mailbox requires a plugin disabled by default
  • Desktop-focused app coverage

• eM Client — where it wins

  • Unified inbox supports multiple email accounts
  • Works across Windows, macOS, iOS and Android
  • Includes encryption, offline access, calendars and AI assistance

  Where it doesn't

  • Free license is limited to two email accounts
  • Free license is for personal, non-commercial use
  • Its broad feature set may exceed email-only needs

• KMail8.9/10 · Free plan

  A mature, configurable Linux email client with broad protocols and offline access.

  Visit KDEFull verdict →
• eM Client8.8/10 · Free plan · 30-day trial

  A capable multi-account client for users who want email alongside broader productivity tools.

  Visit eM ClientFull verdict →