Inbox2

Inbox2 is a premium connected lifestyle application that brings communication - and the people you communicate with - into a single, synchronized application that is accessible everywhere.

Free
Open Source
Windows
Web

Inbox2 is a premium connected lifestyle application that brings communication and the people you communicate with into a single, synchronized application that is accessible everywhere. The innovative email platform allows you to plugin your existing email accounts (Gmail, Yahoo, Hotmail, Exchange) or any custom IMAP/POP3 accounts and social networks (Facebook, LinkedIn, Hyves, Yammer, Twitter) in one application.

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The Best 33 Inbox2 Alternatives

1709 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.

Free Open Source Windows Linux BSD Mac Haiku

Customizable Extensible by Plugins/Extensions Portable Integrated Chat Built in RSS reader Calendar integration Free API Import from Google Reader Integrated Web Browser Multiple Account support Export to OPML Import feeds from OPML POP3 Support Tabbed interface
303 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.

Commercial Mac OS X Windows Android iPhone Android Tablet iPad Web Windows Phone

Built in Calendar Dark theme Signature with image
269 Like

Mailbird

Mailbird is more than just another email client - It's an all-in-one communication platform for email, contacts, calendar, apps, task management, video meetings and much more. Try it free, today.

Freemium Windows

Sync Contacts GSuite Integration Multiple Account support Slack integration Dropbox integration Facebook integration Asana integration Conversation view Trello integration Twitter integration Undo send Unified inbox
222 Like

Inbox by Gmail

Built on everything that we've learned from Gmail, Inbox is a fresh start that goes beyond email to help you get back to what matters. Bundles, because some messages just belong together. Promotions are now neatly organised.

Free Android iPhone iPad Chrome OS Web Chrome

Sync with Google Calendar Mobile friendly No Exchange/365 Support To Do management
177 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.

Freemium Windows

Support for IMAP Calendar integration POP3 Support Dark theme Encrypted email Conversation view Automatic Backup Built in themes Built in translation Combined Inbox Email preview Imports email from Live mail Tasks managment
165 Like

K-9 Mail

K-9 is an open source email client for Android with multi-folder sync, email signatures, Bcc-to-self, return-address configuration, keyboard shortcuts, Exchange Support, message flagging, IMAP deletes, saving attachments, configurable...

Free Open Source Android Android Tablet

Privacy focused Ad free Multiple Account support PGP Encryption
146 Like

Evolution

Evolution is the official personal information manager and workgroup information management tool for GNOME. It combines e-mail, calendar, address book, and task list management functions.

Free Open Source Linux BSD S/MIME GNOME OpenPGP

Integrated Spam Protection Multiple languages Built in RSS reader Calendar integration POP3 Support Encrypted email CalDAV CardDAV
75 Like

Claws Mail

Claws Mail is an email client (and news reader), based on GTK+, featuring Quick response Graceful, and sophisticated interface Easy configuration, intuitive operation Abundant features Extensibility ...

Free Open Source Windows Linux BSD Xfce

Customizable Extensible by Plugins/Extensions Support for IMAP Multiple languages Built in RSS reader Multiple Account support Lightweight Content Filtering
69 Like

Geary

Geary is an email application built for GNOME 3. It allows you to read and send email with a simple, modern interface.

Free Open Source Linux BSD GNOME
54 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 signatures.

Commercial Mac OS X iPhone iPad Apple Watch

Customizable Multiple Account support Lightweight Dropbox integration Fullscreen support
51 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.

Free Mac OS X iPhone iPad Apple Watch

Calendar integration Export to PDF
30 Like

Zimbra Desktop

The free Zimbra Desktop client allows you to meld the online and offline worlds – storing and synching your email, calendar, contacts, files and documents in the cloud, yet having them locally accessible when on the road.

Free Personal Mac OS X Windows Linux
28 Like

Kontact - KMail

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.

Free Open Source Mac OS X Windows Linux BSD
24 Like

Kontact

Kontact is the integrated Personal Information Manager of KDE. Kontact suite unites mature and proven KDE PIM applications under one roof. Thanks to the powerful KPart technology, existing applications are seamlessly integrated into one.

Free Open Source Windows Linux
21 Like

Icedove

icedove is the thunderbird email client rebranded by debian .

Free Open Source Linux Xfce

Extensible by Plugins/Extensions Integrated Chat Built in RSS reader Export to OPML Import feeds from OPML Tabbed interface
18 Like

Microsoft Mail and Calendar

windows 10 has mail and calendar apps already built in.

Free Windows Windows RT
17 Like

TypeApp

TypeApp is an all-free, beautifully designed, universal email app, capable of managing unlimited number of mail accounts from various providers, allowing for smart push notifications while enabling personalization across multiple email...

Free Personal Android iPhone Android Tablet iPad Android Wear Kindle Fire

Multiple Account support Live Push Notifications Unified inbox
16 Like

iRedMail

A fully fledged, free email server solution, an open source project (GPL v2). Use official binary packages from Linux/BSD distributions, with both i386 and x86_64 support. Easy, fast deployment in LESS THAN 1 MINUTE.

Free Open Source Linux BSD Self-Hosted
12 Like

Unified Inbox

Unified Inbox is a cloud based unified communication & social collaboration platform that centralizes external conversations, social engagement and internal team collaboration into one single experience across desktop and mobile...

Freemium Web

Real time collaboration Unified messaging
5 Like

SlideMail

Making email better through artificial intelligence.

Free iPhone

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Inbox2

Links to official Inbox2 sites

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The Best 33 Inbox2 Alternatives

Thunderbird

Microsoft Office Outlook

Mailbird

Inbox by Gmail

eM Client

K-9 Mail

Evolution

Claws Mail

Geary

Airmail

Spark

Zimbra Desktop

Kontact - KMail

Kontact

Icedove

Microsoft Mail and Calendar

TypeApp

iRedMail

Unified Inbox

SlideMail

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