Free and open first
Best Email Clients in 2026 — page 4
- 142 apps
- Research read 28 Sept 2026
- How the order is worked out
- 76
K-9 Mail
Free plan AndroidK-9 Mail provides a broad Android email feature set without a charge, including unified account handling, offline access, and encrypted-mail support.
- 77
Hylki
Free plan LinuxHylki combines GNOME integration, account unification and privacy-focused email features in a free AGPLv3 package.
- 78
Openmail
Free plan LinuxMacSelf-hosted+1Openmail combines broad account management with a self-hosted design and cross-account controls. Its separate, command-line-oriented server and changing development status matter when choosing it.
- 79
Himalaya
Free plan LinuxMacWindowsHimalaya provides broad protocol and local-format coverage through a scriptable command-line interface. Check its OAuth and credential-handling requirements before choosing it for account setup.
- 80
Astroid
Free plan LinuxMacWindowsAstroid offers a customizable graphical front end for a notmuch-based mail setup.
- 81
Microsoft DevSkim
Free plan APIExtensionLinux+3DevSkim offers IDE, CLI, and library options for security linting, with custom rules and several result formats.
- 82
- 83
Inboxed
Free plan MacInboxed combines offline Mac email access with on-device summaries and receipt categorization.
- 84
Checker Plus for Gmail
by Checker Plus for GmailFree plan ExtensionChecker Plus for Gmail concentrates Gmail management, account monitoring, and configurable desktop or voice alerts in a browser extension.
- 85
PikuMail
Free plan WindowsPikuMail combines multi-account email with local storage, encryption choices, PGP, search, calendar, and notes.
- 86
SnappyMail
by SnappyMailFree plan LinuxSelf-hostedWebSnappyMail offers self-hosted webmail with broad protocol, interface and OpenPGP support, without requiring a database.
- 87
RainLoop
Free plan Self-hostedWebRainLoop combines browser email access with direct server connections, account switching, filtering, and several security controls.
- 88
Matcha
Free plan LinuxMacSelf-hosted+1Matcha combines terminal email handling with Markdown writing, account management, offline use, and extensibility.
- 89
myMail
Free plan AndroidiPhonemyMail brings broad IMAP/POP3 provider support, account consolidation, search, notification controls, and swipe-based message actions to mobile devices. Its listed Free plan costs nothing.
- 90
Opterius Mail
by Opterius MailFree plan Self-hostedWebOpterius Mail combines a full webmail client with optional server administration and hosting-panel integration. Its self-hosted nature and operating-system requirements matter for deployment planning.
- 91
Mutt
Free plan LinuxMacWindowsMutt provides extensive configuration and mail-format support in a text interface. It is most suitable for users comfortable managing a configurable desktop mail workflow.
- 92
GNUMail
Free plan LinuxMacWindowsGNUMail provides a free, cross-platform desktop email client with source releases and documented dependencies. Users should account for GNUstep and Pantomime requirements on supported systems.
- 93
Amailia
Free plan AndroidiPhoneWebAmailia centralizes several mail services with broad message actions, sorting, search, and scheduling. Its free tier covers one account, while higher account limits require paid monthly plans.
- 94
SIEVER Mail
Free plan LinuxMacWindowsSIEVER Mail focuses on multi-account desktop email with local storage, search, organization, and privacy-oriented handling.
- 95
Pegasus Mail
Free plan WindowsPegasus Mail provides a free Windows email client with broad protocol support, offline access, filtering and encryption options. It is focused on desktop Windows use rather than cross-platform access.
- 96
Pandora Mail
Free plan WindowsPandora Mail offers extensive Windows mailbox and message controls with multiple security and storage formats. Decide whether Demo-Mode’s limits or Full-Mode registration fit your use.
- 97
Carbon Mail
Free plan WebCarbon Mail combines Gmail access with action-oriented sorting, writing assistance, and on-device protections. Its current focus is desktop, with mobile companions not yet available.
- 98
Sterna Mail
Free plan AndroidSterna Mail focuses on private, protocol-flexible email for Android, with offline caching and scheduling included.
- 99
Open WebMail
Free plan LinuxSelf-hostedWebOpen WebMail provides broad mail, contact, calendar, and administration features without a listed cost.
- 100
SquirrelMail
by SquirrelMailFree plan Self-hostedWebSquirrelMail offers a no-license-fee webmail package with familiar email functions and extensive plugin customization.
