Alternatives to Spark for Mac with any license

Thunderbird

Thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after Mozilla Firefox.
- Thunderbird is buggy, frequently locks up, slow and takes long to update from server. Spark is fast, easy and beautiful Guest • Mar 2017 • 13 agrees and 3 disagrees
- There is NO Spark Version for Windows. That's why Thunderbird is the Best Alternative IMO. Guest • Apr 2018 • 4 agrees and 1 disagrees
Free Open Source Mac Windows Linux BSD PortableApps.com ... Haiku
Extensible by Plugins/Extensions Built-in RSS reader Built-in Calendar Calendar integration ... Categories Customizable Extensible by Plugins/Extensions Free API Gmail integration Google Calendar integration Import from Google Reader HTML Compose Support for IMAP Integrated Chat Integrated Password Manager Integrated Web Browser Legacy addons support Multiple Account support Export to OPML Import feeds from OPML POP3 Support Portable Secure File Sharing SMTP integration Tabbed interface Support for Themes Add a feature

1793 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.
- Integrates deeply into windows OS and has all the bells and whistles. Guest • Jun 2017 • 1 agrees and 2 disagrees
- Best client for windows that is out there. others are buggy or do not sync correctly. Guest • May 2017 • 0 agrees and 4 disagrees
Freemium $ $ $ Mac Windows Web Android iPhone ... Android Tablet Windows Phone iPad Apple Watch Android Wear
Box.com integration Built-in Calendar Calendar integration 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 Unified inbox Yahoo Integration Add a feature

319 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
CalDAV CardDAV Bundled with macOS Add a feature

211 Like
Postbox

Postbox is an email application that helps you organize your work life and get stuff done. It has all the elegance and simplicity of Apple Mail, but with more power...

Commercial Mac Windows
Multiple Account support Box.com integration Built-in RSS reader Dropbox integration ... Extensible by Plugins/Extensions Support for IMAP Multiple languages Onedrive integration POP3 Support Tabbed interface Visual Programming Add a feature

132 Like
Opera Mail

Opera Mail powerfully organizes, indexes, and sorts your messages. It has spam filtering (both automated and Bayesian), supports POP3 and IMAP, newsgroups as well as...

Free Mac Windows PortableApps.com
Built-in RSS reader Integrated Spam Protection Mail filtering Message Filtering ... Portable Add a feature

97 Like
- Discontinued Opera Mail is no longer updated and supported, but last version, 1.0.1044, released in February 2016, can be still downloaded from the official website.
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...
- It's the most similar, with the features most inline. It even looks the same in appearance, and all the menus and shortcut keys match. Guest • Mar 2018 • 0 agrees and 1 disagrees
Freemium $ $ $ Mac Windows Linux Arch Linux Fedora ... Ubuntu
Multiple Account support Night mode/Dark Theme Email tracking Sync Contacts ... Customizable Drag n drop Email Analytics Email tracking & analytics Extensible by Plugins/Extensions Support for IMAP Support for Themes Threaded Conversations Unified inbox Add a feature

32 Like
Airmail

Airmail is a lightweight and lightning fast mail client for Mac. Feature list: Accounts: - Unified Inbox and folders - Multi Account with editable html...

Commercial Mac iPhone iPad Apple Watch
Customizable Dropbox integration Fullscreen support Lightweight ... Multiple Account support Add a feature

59 Like
Canary Mail

Canary is an exciting new email client for Mac that offers a full set of powerful features with one key difference - your emails are not stored on a 3rd party server. ...

Commercial Mac iPhone
No features added Add a feature

10 Like
Polymail

The most powerful platform for email productivity in a beautiful native app — on desktop and mobile.

Commercial $ $ $ Mac iPhone iPad
Sync Contacts Email scheduling Email tracking Multiple Account support Add a feature

20 Like
Unibox

Unibox is a people centric email client that organizes your messages by person. It avoids having email like a to-do list. Features: - Unibox supports IMAP servers:...

Commercial Mac
Multiple Account support Add a feature

15 Like
MailMate

MailMate is an IMAP email client for Mac featuring extensive keyboard control, Markdown supported email composition.

Commercial $ $ $ Mac S/MIME OpenPGP
No features added Add a feature

17 Like
Nylas Mail Lives

Nylas Mail Lives is a fork of Nylas Mail that fixes many longstanding issues, improves the client experience, and is committed to...

Free Open Source Mac Windows Linux Self-Hosted
Extensible by Plugins/Extensions Multiple Account support Add a feature

3 Like
- Discontinued On its github page it states it is archived and is no longer maintained.
Hiri

Fast, good looking email client. Lighter than MS Outlook with some unique and clever features. Works ONLY with Outlook / Exchange.

Commercial $ $ $ Mac Windows Linux
Calendar integration Office 365 integration Convert Email to Task Add a feature

23 Like
GyazMail

GyazMail is a email client software for Mac OS X, based on Cocoa framework, simple, easy-to-use with many features.

Commercial Mac
POP3 Support Add a feature

3 Like
Columba

Columba is an email client written in Java, featuring a user-friendly graphical interface with wizards and internalionalization support. Its a powerful mail management...

Free Open Source Mac Windows Linux BSD
No features added Add a feature

3 Like
- Discontinued The project is no longer developed. Last version, 1.4, released in March 2007, can be still downloaded from SourceForge.