3 Best Alternatives to K-9 Mail in 2021
Summary
K-9 Mail
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K-9 Mail is a 100% free and open source email client for Android. |
Parent Company : K-9 Dog Walkers
Rating : 3.9 from 91597 ratings
Investors : -
Download : Google Playstore
K-9 Mail is an open source email client with support for multiple accounts, search, IMAP push email, multi-folder sync, flagging, filing, signatures, BCC-self, PGP/MIME & more! K-9 supports IMAP, POP3 and Exchange 2003/2007 (with WebDAV). Install the app &...K-9 Mail is an open source email client with support for multiple accounts, search, IMAP push email, multi-folder sync, flagging, filing, signatures, BCC-self, PGP/MIME & more!
K-9 supports IMAP, POP3 and Exchange 2003/2007 (with WebDAV).
Install the app "OpenKeychain: Easy PGP" to encrypt/decrypt your emails using OpenPGP.
K-9 is a community developed project. If you're interested in helping to make the most popular open source email client on Android even better, please join us! You can find our bug tracker, source code, mailing list and wiki at https://github.com/k9mail/k-9
We're always happy to welcome new developers, designers, documenters, bug triagers and friends.
If you're having trouble with K-9, please report a bug at https://github.com/k9mail/k-9 rather than just leaving a one-star review. We don't mind you telling the world that you're frustrated, but if you use our bug tracker, we have a better chance of fixing whatever's giving you a hard time.
You can find K-9's release notes at: http://bit.ly/new-k9
Alternatives
Explore these hand-picked list to see what the people around the globe are using as alternatives.
1. ProtonMail - Encrypted Email
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World’s largest encrypted email service - easy to use, free for all. |
Parent Company : Proton Technologies AG
Rating : 4.5 from 28251 ratings
Investors : European Commission
, CRV 
, ... FONGIT , MassChallenge , MIT Venture Mentoring Service (MIT VMS) Download : Google Playstore
“ProtonMail offers encrypted email, which makes it virtually impossible for anyone to read it except the sender and the recipient.” Wall Street Journal ProtonMail is the world’s largest encrypted email service with millions of users. The ProtonMail secure email app fo...“ProtonMail offers encrypted email, which makes it virtually impossible for anyone to read it except the sender and the recipient.” Wall Street Journal
ProtonMail is the world’s largest encrypted email service with millions of users. The ProtonMail secure email app for Android brings easy-to-use email encryption to your mobile device by seamlessly integrating PGP end-to-end encryption. ProtonMail also provides a modern user interface with a full set of innovative features such as customizable swipe gestures and the ability to send expiring emails.
Since we were founded by CERN scientists in 2013, we have been joined by citizens from around the globe who have supported our mission to protect online privacy. Our mobile app was made possible by a record-breaking $550,000 donation campaign. With the ProtonMail app, you can now create your own free ProtonMail email account and start experiencing the secure email of the future.
Why use ProtonMail?
• Ensure your emails stay private and cannot be intercepted or disclosed to third parties
• End-to-end encryption, OpenPGP compatible
• Easy-to-use: encryption is done automatically and is completely invisible to the user
• Zero-access: all messages are stored in encrypted format—not even ProtonMail can read your messages
• Open source: ProtonMail's encryption is open to inspection by security experts from around the world
• Free: ProtonMail is 100% free, no catches. If you like our project, you can donate or upgrade to a premium account
• Swiss privacy and neutrality: ProtonMail is hosted entirely in Switzerland, under the protection of the world's strongest privacy laws
With the ProtonMail app, you can:
• Create a new protonmail.com email address with automatic PGP key creation and management
• Send and receive encrypted emails and attachments automatically
• Set timers for messages to self-destruct after sending
• Quickly organize emails with customizable swipe gestures and labels
• Get push notification of new emails
• Send password protected encrypted emails to non-ProtonMail email addresses
ProtonMail in the press:
“ProtonMail is a gmail-like email system which uses end-to-end encryption, making it impossible for outside parties to monitor.” Forbes
“A new email service being developed by a group from MIT and CERN promises to bring secure, encrypted email to the masses and keep sensitive information away from prying eyes.” Huffington Post
For more information, visit: https://protonmail.com
Our open-source code base: https://github.com/ProtonMail
To donate, visit: https://protonmail.com/donate
2. Yahoo Mail – Organized Email
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Works with Gmail, Outlook and AOL. No Yahoo email required! |
Parent Company : Yahoo
Rating : 4.5 from 5176822 ratings
Investors : SoftBank Capital
, Sequoia , ... Verizon Communications , Visa , Reuters Venture Capital 
, Randy Adams Download : Google Playstore
Thanks for checking out the Yahoo Mail app—the best email app to organize your Gmail, Microsoft Outlook, AOL, AT&T and Yahoo mailboxes. Whether you need a clutter-free mailbox, added customization, different views for deals, receipts, and attachments, or even more storag...Thanks for checking out the Yahoo Mail app—the best email app to organize your Gmail, Microsoft Outlook, AOL, AT&T and Yahoo mailboxes. Whether you need a clutter-free mailbox, added customization, different views for deals, receipts, and attachments, or even more storage, we’ve got you covered.
Favorite features:
Use any email address
Don’t make your other inboxes jelly. Add your Gmail, Outlook or AOL account and keep everything in one place. Custom settings, colors and notifications make it a breeze to keep your accounts separate.
Unsubscribe
Go forth and unsubscribe from the spam and junk mail you don’t want to see in your inbox. Yahoo Mail shows all the mailing lists you're subscribed to on one screen and makes it easy to opt-out in one tap.
Attachments view
Looking for that one doc from that one person? Or, a photo from brunch three Sundays ago? Don’t panic, It’s right here. See all of your photos and files attachments in one easy view.
Customization
Your inbox, your vibe. Customize the bottom nav bar with the folders and views you care about most. Then, pick custom sounds, themes, swipes to add your own flavor and unboring your inbox.
Travel view
Travel stress-free. This view keeps all of your flight information in one organized spot. Smart Updates, from gate changes to delays and cancellations, will instantly appear in the app, so once you check in—you can check waaaaaay out.
Deals view
Expires today? Challenge accepted. See the deals from your inbox in one quick view or enable location permissions to see a map of deals near you and get notified in real-time as you walk into your favorite stores.
Groceries view
Win at groceries, every time. Add your grocery store loyalty cards to save coupons that will automatically get applied at checkout. To save even more, see all the deals in your area and save them to your shopping list.
People view
Only see emails from your favorite people. Ignore the robots.
Receipts view
No more crumpled receipts in your pocket. Find them neatly organized in your inbox.
Sounds + notifications
Choose from several categories of notifications, custom sound alerts and visual settings—so, you get the reminders you need. And none you don’t.
Accessibility
Features high contrast themes, dynamic text resizing, and optimized for use with VoiceOver screen readers. Plus, folders at the bottom of the Inbox allow assistive technology users to navigate with less effort.
1000 GB storage
You can’t see your whole world without room to roam. Download the app and you’ll never have to delete memories to get your mail again.
Yahoo Mail Pro
Get ad-free mail on Yahoo Mail for Android and priority customer support.
+ Available as an in-app purchase at $0.99/month or $9.99/year
+ Subscription will auto-renew each month or year within 24 hours of your renewal date
+ Manage or cancel your subscription via Account Settings
Terms of service: https://policies.yahoo.com/us/en/yahoo/terms/product-atos/comms-mailadfree/index.htm
Privacy policy: https://policies.yahoo.com/us/en/yahoo/privacy/products/mail/index.htm
https://policies.yahoo.com/us/en/yahoo/terms/product-atos/comms-mailadfree/index.htm and privacy policy at https://policies.yahoo.com/us/en/yahoo/privacy/products/mail/index.htm
Please note: This app features Nielsen’s proprietary measurement software which will allow you to contribute to market research, like Nielsen’s TV Ratings. Please see www.nielsen.com/digitalprivacy for more information. You may also visit Settings in the app to opt-out of Nielsen measurement.
3. Microsoft Outlook: Organize Your Email & Calendar
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Microsoft Outlook is your personal organizer for your emails, calendar & files. |
Parent Company : Microsoft Corporation
Rating : 4.4 from 5121219 ratings
Investors : Microsoft
Download : Google Playstore
Easily organize with email, calendar, and files in one app with Microsoft Outlook. With intelligent email, calendar reminders and contacts, Outlook for Android lets you do more from one powerful inbox. Connect. Organize. Get things done. Email friends, family and coll...Easily organize with email, calendar, and files in one app with Microsoft Outlook. With intelligent email, calendar reminders and contacts, Outlook for Android lets you do more from one powerful inbox. Connect. Organize. Get things done.
Email friends, family and colleagues from multiple accounts on one app and see what matters most first with the Focused Inbox that keeps the important messages on top. Switch between your emails and calendar to schedule your next meeting or share your availability with anyone with just a few taps. Email a document from your Files list or a photo from your Gallery and attach it easily.
Microsoft Outlook provides seamless inbox management that enables you to stay connected on the go. Outlook includes Office, Word, Excel, PowerPoint and OneDrive integrations to help you manage and send files and connects with Teams, Zoom and other video calling providers without hassle.
Customize email and calendars so you can stay on top of your busy day. Listen to what’s new in your inbox, organize schedules and more. Find what you need with Search- it’s only a tap away or you can use your voice and ask for what you need with language you use every day.
Outlook for Android works with Microsoft Exchange, Microsoft 365, Outlook.com, Gmail and Yahoo Mail.
MICROSOFT OUTLOOK FEATURES:
One Place – Email, Calendar, Contacts & Files
• Email, calendar, contacts and files are all together in one place.
• Calendar and file access right from your inbox.
• Connected experiences with Office, Word, Excel, PowerPoint and OneNote.
• Microsoft Office documents are accessible from Outlook, stored locally, or on OneDrive or other cloud storage.
• Create and join your online video calls and meetings with Teams, Zoom, BlueJeans and Webex.
Organized – Email & Day Planner Management
• Outlook helps you stay on top of your day with customized calendar and email capabilities.
• Know what’s Up Next in your day from your calendar with a glance at your inbox.
• Email inbox management displays your most important messages first and enables swipe gestures and smart filters.
• Use as an organizer & share calendars to easily coordinate schedules.
• RSVP to invitations from your inbox and send a personalized comment too.
• Add schedules from Facebook or of your favorite sports & TV shows through Bing calendars.
Intelligent – Calendar & Inbox Organizer
• Outlook provides helpful ways for you to stay focused.
• Use your voice to find people, contacts, emails, events and attachments with Search.
• Use suggested replies instead of typing out your message responses to get things done faster.
• Email manager highlights actions for you through @mentions.
• Calendar automatically updates with travel and delivery information.
• Focused Inbox keeps important emails and conversations front and center.
• Email organizer groups same subject emails and conversations for easier tracking.
• Listen to your emails with Play My Emails in English and catch up hands-free to get time back in your day.
Secure – Safe Email Management & Spam Protection
• Microsoft Outlook protects your information with security you can trust.
• Simple, secure sign-on to authenticate and protect your identity.
• Email management with built-in protection against viruses and spam.
• Advanced protection to keep your messages safe from phishing attacks and other online threats.
• Microsoft security and privacy keeps your email, calendar, contacts and files safe.
Get management for contacts, email, work schedule, files and more with Microsoft Outlook today.
