Thunderbird
Open Source
Thunderbird is a open source mail client developed and maintained by Mozilla foundation.
Mailbird
Freemium
Mailbird is a desktop email client for Windows 7, 8 and 10.
eM Client
Free Personal
eM Client is a Windows based e-mail client for sending and receiving e-mails, managing calendars, contacts, and tasks.
Postbox
Commercial
Postbox is powerful, intuitive, ultra-customizable, speedy task manager.
Claws Mail
Open Source
Claws Mail is a free and open-source, GTK+-based email and news client. It offers easy configuration and an abundance of features.
Airmail
Commercial
Airmail is a fast mail client for Mac and iPhone.
Polymail
Freemium
Polymail is an email application for OS X and iOS known for its clean interface and additional features atop the Gmail platform.
MailMate
Commercial
MailMate is an IMAP email client for macOS featuring extensive keyboard control, Markdown integrated email composition, advanced search conditions.
Microsoft Office Outlook
Commercial
Microsoft Outlook is a personal information manager from Microsoft.
Apple Mail
Free
Apple Mail is an email client included with the operating systems macOS, iOS and watchOS by Apple Inc.
K-9 Mail
Open Source
K-9 Mail is an open source email client with support for multiple accounts, search, IMAP push email, multi-folder sync, flagging, filing, signatures.
Mailspring
Freemium
Mailspring is a multi-platform email client.
The Bat
Commercial
The Bat! is an email program for Windows that protects the correspondence and empowers the users to handle large amounts of emails quickly and efficiently.
OpenProject
Open Source
OpenProject is a web-based project management system for location-independent team collaboration.
Microsoft Mail and Calendar apps help you stay up to date on your email, manage your schedule and stay in touch with people you care about the most.
TypeApp
Free Personal
TypeApp is a mobile email client app.
Compare Spark with alternatives
Compare Microsoft Office Outlook and Spark and decide which is most suitable for you.
Compare Microsoft Mail and Calendar and Spark and decide which is most suitable for you.