Alternatives to Opera Mail for all platforms with any license

eM Client Sponsored

eM Client is a full featured email client with a modern and easy to use interface. - offers calendar, tasks, contacts and even chat. - supports all major services including Gmail, Exchange, iCloud, and Outlook.com.

Freemium Mac Windows
Calendar integration Automatic Backup Built-in themes Built-in translation ... CalDAV CardDAV Cloud sync Combined Inbox Sync Contacts Contacts Cross-platform Encrypted Email Email preview Exchange Gmail integration Apps that Sync with Google Calendar Support for IMAP Imports email from Live mail Multiple Account support Night mode/Dark Theme Organize mails Outlook integration PGP Encryption POP3 Support Ssl Calendar Sync Threaded Conversations Unified inbox Add a feature

206 Like
Thunderbird

Thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after Mozilla Firefox.
- The addons extend Thunderbird's functionality making it by far the best email client ever made. zibusisomasuku • May 2017 • 0 agrees and 2 disagrees
Free Open Source Mac Windows Linux BSD PortableApps.com ... Haiku
Extensible by Plugins/Extensions Support for IMAP Built-in RSS reader Encryption ... SMTP integration Add-ons Calendar integration Extensions Multiple Account support Protected by Password Tabs Built-in Calendar Categories Customizable Delivery reports Desktop interface Extensible by Plugins/Extensions Free API Gmail integration Google Calendar integration Import from Google Reader Gui HTML Compose Integrated Chat Integrated Password Manager Integrated Web Browser Intuitive Legacy addons support Export to OPML Import feeds from OPML Organize mails POP3 Support Portable Secure File Sharing Support for POP3 Tabbed interface Support for Themes Add a feature

2025 Like
K-9 Mail

Open source Android email client with support for multi-folder sync, keyboard shortcuts, and more.
- Not a desktop email application ndlinn • Mar 2020
Free Open Source Android Android Tablet F-Droid
Ad-free Encryption Configurable Encrypted chat ... Exchange Header sorting Support for IMAP Multiple Account support One view multiple accounts PGP Encryption POP3 Support Privacy focused Add a feature

239 Like
Microsoft Office Outlook

Part of the Microsoft Office Suite, Outlook is a personal information manager that lets you manage your e-mail, calendar, contacts, and tasks.

Freemium $ $ $ Mac Windows Web Android iPhone ... Android Tablet Windows Phone iPad Apple Watch Android Wear
Address book integration Built-in Calendar Calendar integration Exchange ... Box.com integration Contacts Custom rules Dropbox integration Email scheduling Exchange Integration Flight Status Gmail integration ICloud Integration Integrated Search Multiple Account support Night mode/Dark Theme Office 365 integration Onedrive integration Organize mails Shared calendars Signature with image Smart attachments Todos Unified inbox Yahoo Integration Add a feature

363 Like
eM Client

eM Client is a full featured e-mail client with a modern and easy to use interface. eM Client also offers calendar, tasks, contacts and chat.
- Compatibility with native exchange server, so one can sync not only mail, but tasks, calender and contacts too. hanssietsma • Dec 2016 • 2 agrees and 1 disagrees
Freemium Mac Windows
Calendar integration Automatic Backup Built-in themes Built-in translation ... CalDAV CardDAV Cloud sync Combined Inbox Sync Contacts Contacts Cross-platform Encrypted Email Email preview Exchange Gmail integration Apps that Sync with Google Calendar Support for IMAP Imports email from Live mail Multiple Account support Night mode/Dark Theme Organize mails Outlook integration PGP Encryption POP3 Support Ssl Calendar Sync Threaded Conversations Unified inbox Add a feature

206 Like
Mailspring

Boost your productivity and send better email with Mailspring, a beautiful, fast email client for Mac, Windows, and Linux. Mailspring is free to use and an optional pro...

Freemium $ $ $ Mac Windows Linux Arch Linux Fedora ... Ubuntu
Unified inbox Multiple Account support Customizable Email tracking ... Night mode/Dark Theme Ad-free Auto update Beauty and fluid interface Built-in themes Multi-platform support Notifications Sidebar Theme Customization Support for Themes User friendly Drag n drop Electron based Email Analytics Extensible by Plugins/Extensions Support for IMAP Snooze mail Threaded Conversations Add a feature

77 Like
Evolution

Evolution is a personal information management application that provides integrated mail, calendaring, address book and task list functionality.

Free Open Source Linux BSD S/MIME GNOME OpenPGP
Calendar integration CalDAV Exchange Built-in RSS reader ... Calendar view CardDAV Contacts Encrypted Email Integrated Spam Protection Multiple languages POP3 Support Reminders Support for WebDAV Add a feature

175 Like
Spark

E-mail app with all the great features: swipes (long/short), snooze, add (multiple) attachments from the cloud, support for various e-mail services and more.

Freemium Mac Android iPhone
Clean design Multiple Account support Sync across Devices Calendar integration ... Email scheduling Exchange Organize mails Postpone email reception Smart inbox Snooze mail Add a feature

91 Like
Apple Mail

There’s big news attached. The best way to manage email on a Mac gets even better with OS X Yosemite.

Free Mac iPhone iPad
Bundled with macOS CalDAV CardDAV Encrypted Email ... Exchange Organize mails Rich text editing UI customization Add a feature

226 Like
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OpenProject

OpenProject is an open-source project management software with a wide set of features and plugins. It supports project timelines / Gantt charts, issue tracking, wiki...

Freemium $ $ $ Open Source Web Self-Hosted Ruby Cloudron
Gantt-charts Kanban boards Work Item Tracking Agile boards ... Computer-aided manufacturing (CAM) Cost Calculator Cost estimate Email tracking Gantt-charts Issue Tracking Project Tracking Reporting Splitting costs Task Management Timeline Wiki Add a feature

74 Like
Claws Mail

Claws Mail is an email client (and news reader), based on GTK+, featuring Quick response Graceful, and sophisticated interface Easy configuration...
- No central inbox or unread box for all mailbox accounts Guest • Oct 2017
Free Open Source Windows Linux BSD
Lightweight Built-in RSS reader Content Filtering Customizable ... Extensible by Plugins/Extensions Support for IMAP Integrated Email Client Multiple languages Multiple Account support Add a feature

88 Like

3.5 out of 5 with 2 ratings

Opera Mail Comments

Almost

Comment by DanMan

about Opera Mail · May 2015 · Helpful Not helpful Report as spam

I'd be all over this, if only it supported GPG encryption. But it doesn't so it's not an option.

Best search driven email client that's not gmail

Comment by Seth

about Opera Mail · Apr 2013 · Helpful Not helpful Report as spam

Fun fact: Opera's unique search driven email interface actually predates gmail. I ended up switching back to Opera Mail (previously called "M2") after making the decision to close all Google accounts.

The contact management, import/export, and (non-existent) sync sucks, and there's no support for encryption, but aside from those drawbacks I'm pretty happy with it.

[Edited by Seth, April 05]

Opera Mail

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Alternatives to Opera Mail for all platforms with any license

eM Client Sponsored

Thunderbird

K-9 Mail

Microsoft Office Outlook

eM Client

Mailspring

Evolution

Spark

Apple Mail

Know any more alternatives to Opera Mail?

OpenProject

Claws Mail

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Mobile

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Opera Mail Comments

Almost

Best search driven email client that's not gmail