Open Source Microsoft Office Outlook Alternatives
The best open source alternative to Microsoft Office Outlook is Thunderbird, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Microsoft Office Outlook and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Microsoft Office Outlook are Evolution (Free, Open Source), K-9 Mail (Free, Open Source), Mailspring (Freemium, Open Source) and Geary (Free, Open Source).
- Free email application that’s easy to set up and customize - and it’s loaded with great features!. View 90 alternatives to Thunderbird
- Free • Open Source
- Mac
- Windows
- Linux
- BSD
- PortableApps.com
- Haiku
Thunderbird vs Microsoft Office Outlook
Seems to be more secure than Microsoft alternatives and more easily updatable.JohnFastman Despite its age, Thunderbird remains the most fully featured email client out there. Various add-ons can extend its functionality, it (now) has a built in calendar and, unlike Outlook, it's free, open source and respects your privacy.The interface is just impossible for many people to use.I transitioned all ove my computers from Windows to Linux. I had 4 computers so I used four different distributions with different linux bases, Debian and Arch. Thunderbird worked perfectly. The email client is awesome, I think they should devote more development efforts to calender and task management integration.sangwenobdi It can access email server just as outlookCan202 ThunderBird es la mejor alternativa open source, ya que puedes personalizarlo, mi recomendación es usar la extención CheckBox, Thunderbird junto a CheckBox (extensión), la mejor APP para MailThunderbird is best that other application listed here and GUI is also nice - Evolution is a personal information management application that provides integrated mail, calendaring, address book and task list functionality. View 58 alternatives to Evolution
- Free • Open Source
- Linux
- BSD
- S/MIME
- GNOME
- OpenPGP
Evolution vs Microsoft Office Outlook
Fast and User friendly. Light-weight and classic menus really give a touch of old classic office 2003. Easy integration of mails especially exchange mails without facing any bottlenecks.Support for EWS allows me to connect to exchange and get all the benefits like contacts and calendar I wouldn't so easily get on Thunderbird. Also it nicely integrates with the built in Ubuntu calendar as well which is a big plus.I've found it better than thunderbird and it can work with exchange just with one free pluginThis would be the best alternative, except that it requires the Gnome desktop, so users of other desktop environments need to look elsewhere. - Open source Android email client with support for multi-folder sync, keyboard shortcuts, and more. View 38 alternatives to K-9 Mail
- Free • Open Source
- Android
- Android Tablet
- F-Droid
K-9 Mail vs Microsoft Office Outlook
Online_Purchases1 Deletes e-mail from the server even when underground in NYC subway. Makes life so easy to delete e-mails while on the train When surfacing, K-9 syncs with the server and POOF....those unwanted e-mails are gone from the server.JohnFastman Not the prettiest, but it's open source (trustworthy), free, privacy-respecting and very functional. My go-to Android email client. I cannot hesitate less in recommending it. - 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 version adds read receipts, send later, reminders and more. View 39 alternatives to Mailspring
- Freemium • Open Source
- Mac
- Windows
- Linux
- Arch Linux
- Fedora
- Ubuntu
Mailspring vs Microsoft Office Outlook
Beautiful theme options with custom designed themes available. I tried thunderbird a few times but always came back to mailspring. I LOVE the "views" feature that shows you how many times an email was opened and if it was forwarded by the recipient!Speed of work, good connection to the mail server, speed search. - Geary is an email application built around conversations, for the GNOME 3 desktop. View 49 alternatives to Geary
- Free • Open Source
- Linux
- Chrome OS
- BSD
- GNOME
Geary vs Microsoft Office Outlook
Beatiful frontend Stable working Advanced features - FairEmail is a privacy-focused email client with a setup wizard that helpfully walks you through the steps to use it with any email provider. View 38 alternatives to FairEmail
- Freemium • Open Source
- Android
- Android Tablet
FairEmail vs Microsoft Office Outlook
RasheedAZ open source, secure, regularly updated - Claws Mail is an email client (and news reader), based on GTK+, featuring Quick response Graceful, and sophisticated interface Easy configuration, intuitive... View 80 alternatives to Claws Mail
- Free • Open Source
- Windows
- Linux
- BSD
Claws Mail vs Microsoft Office Outlook
Claws Mail is email only, does not have many of the features of Outlook. Displaying HTML mail is sketchy at best. - KMail is the email component of Kontact, the integrated personal information manager of KDE. Kontact is a personal information manager and groupware software suite for KDE. View 55 alternatives to Kontact - KMail
- Free • Open Source
- Linux
- BSD
Kontact - KMail vs Microsoft Office Outlook
This is a very integrated suite of programs offering all the functionality of Outlook. Native to KDE's Plasma desktop environment. - Mutt is a small but very powerful text-based mail client for Unix operating systems. View 52 alternatives to Mutt
- Free • Open Source
- Mac
- Windows
- Linux
- Xfce
Mutt vs Microsoft Office Outlook
scholasticphilosopher Powerful configuration is possible with mutt, and vim in the terminal.mutt is email only, terminal based. - Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features. View 57 alternatives to Mailpile