K-9 Mail Alternatives for Android

There are many alternatives to K-9 Mail for Android if you are looking for a replacement. The best Android alternative is Microsoft Office Outlook. It's not free, so if you're looking for a free alternative, you could try FairEmail or Spark Mail. If that doesn't suit you, our users have ranked more than 25 alternatives to K-9 Mail and 19 are available for Android so hopefully you can find a suitable replacement. Other interesting Android alternatives to K-9 Mail are Delta Chat, Canary Mail, BlueMail and Skiff Mail.

K-9 Mail alternatives are mainly Email Clients but may also be Calendar Apps or WebMail Providers. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of K-9 Mail.

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K-9 Mail

291

Free • Open Source
Email Client

Android
Android Tablet
F-Droid

K-9 is an open source email client for Android with multi-folder sync, email signatures, Bcc-to-self, return-address...

Learn more about K-9 Mail

Microsoft Office Outlook
Do you think this is a good alternative?
Yes
No
Paid • Proprietary
Email Client
Calendar App
Mac
Windows
Online
Android
iPhone
Android Tablet
Windows Phone
iPad
Apple Watch
Android Wear
135 alternatives to Microsoft Office Outlook
Microsoft Outlook, part of the Microsoft 365 (Office) (not to be confused with Microsoft Outlook Express), is a personal information manager that lets you manage your e-mail, calendar, contacts, and tasks.
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Microsoft Office Outlook Features
1. Email OrganizerMicrosoft Office Outlook allows you to take control of your inbox by filtering and control tools.
2. Calendar IntegrationMicrosoft Office Outlook lets you sync your tasks and events with your calendar application.
3. Support for @mentionsMicrosoft Office Outlook supports the use of mentions through @ to a particular user, who will be notified personally.
4. Calendar ViewMicrosoft Office Outlook has a built-in calendar view to have a clear overview of your content over time.
5. Support for AliasesMicrosoft Office Outlook supports aliases, so you can receive email without exposing your main email address
6. Unified inboxView e-mails (or similar) from all accounts in one unified view with Microsoft Office Outlook.
7. Multiple Account supportMicrosoft Office Outlook support multiple accounts without the need to logout and login
8. Works OfflineMicrosoft Office Outlook can be used without the need to connect to the internet.
9. Cloud SyncSync your data (notes, documents, bookmarks, etc.) across your different devices and to the cloud.
Exchange
Native application
Contacts
Built-in Calendar
Onenote Desktop Integration
Address book integration
Dropbox integration
Gmail integration
Office 365 integration
Onedrive integration
Microsoft Office Outlook vs K-9 Mail opinions
This alternative is disputed. Microsoft Office Outlook is still a legitimate alternative to K-9 Mail, but it might have issues that some users think are important.
Guest
Microsoft Office Outlook has more vulnerabilities and so far, seems more of a memory hogger on my device than K-9 Mail. Thank you, K-9 Mail!
Negative comment•
5
FairEmail
Do you think this is a good alternative?
Yes
No
Freemium • Open Source
Email Client
Android
Android Tablet
F-Droid
45 alternatives to FairEmail
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. There are many privacy settings including encryption via OpenPGP and S/MIME and reformatted emails to avoid phishing.
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FairEmail Features
1. Privacy focusedFairEmail is considered a privacy friendly alternative.
2. Multiple Account supportFairEmail support multiple accounts without the need to logout and login
3. PGP EncryptionFairEmail supports PGP, an encryption system used for sending encrypted emails and files.
4. Block TrackersFairEmail has a feature to block trackers from tracking you.
5. Works OfflineFairEmail can be used without the need to connect to the internet.
6. Ad-freeFairEmail doesn't contain any form of external advertising.
7. No TrackingFairEmail will not track you or use your personal data.
8. Calendar IntegrationFairEmail lets you sync your tasks and events with your calendar application.
Customizable
Email notifications
Extensive settings menu
IMAP Support
Notifications
S/MIME Support
FairEmail vs K-9 Mail opinions
Almost everyone thinks FairEmail is a great alternative to K-9 Mail.
Spark Mail
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Yes
No
Freemium • Proprietary
Email Client
Calendar App
Mac
Windows
Android
iPhone
iPad
Apple Watch
58 alternatives to Spark Mail
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.
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Spark Mail Features
1. Multiple Account supportSpark Mail support multiple accounts without the need to logout and login
2. Email SchedulingYou can schedule a marketing, sales, or personal email for a time in the future with Spark Mail.
3. Calendar IntegrationSpark Mail lets you sync your tasks and events with your calendar application.
4. Cloud SyncSync your data (notes, documents, bookmarks, etc.) across your different devices and to the cloud.
5. Email OrganizerSpark Mail allows you to take control of your inbox by filtering and control tools.
6. Dark ModeSpark Mail supports dark mode for comfortable usage in low light conditions.
7. Unified inboxView e-mails (or similar) from all accounts in one unified view with Spark Mail.
8. Works OfflineSpark Mail can be used without the need to connect to the internet.
9. Calendar ViewSpark Mail has a built-in calendar view to have a clear overview of your content over time.
Sorting by folder
Snooze Mail
Ad-free
Sync with Google Calendar
Exchange
Postpone email reception
AI-Powered
Delta Chat
Do you think this is a good alternative?
Yes
No
Free • Open Source
Encrypted Chat App
Instant Messenger
Group Chat App
Mac
Windows
Linux
Android
iPhone
Android Tablet
FLATHUB
F-Droid
56 alternatives to Delta Chat
Delta Chat looks and feels like other popular messenger apps, but does not involve centralized control, tracking or selling you, friends, colleagues or family out to large organizations. "Privacy by Design" has never been more fun.
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Delta Chat Features
1. DecentralizedDelta Chat is based on a decentralized infrastructure with no single entity controlling it.
Encrypted Email
IMAP Support
Multiple languages
Electron based
Canary Mail
Do you think this is a good alternative?
Yes
No
Freemium • Proprietary
Email Client
Calendar App
Mac
Windows
Android
iPhone
Android Tablet
iPad
Apple Watch
61 alternatives to Canary Mail
Email, meet AI. Canary can write your emails, prioritize what needs attention, silence spam & much more. Say hello to your Inbox Copilot!
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Canary Mail Features
1. End-to-End EncryptionCanary Mail has E2E Encryption, for entire or parts of the app.
2. Unified inboxView e-mails (or similar) from all accounts in one unified view with Canary Mail.
3. Multiple Account supportCanary Mail support multiple accounts without the need to logout and login
4. PGP EncryptionCanary Mail supports PGP, an encryption system used for sending encrypted emails and files.
5. No TrackingCanary Mail will not track you or use your personal data.
6. Dark ModeCanary Mail supports dark mode for comfortable usage in low light conditions.
7. Two-factor AuthenticationCanary Mail supports two-factor authentication (2FA).
8. Email OrganizerCanary Mail allows you to take control of your inbox by filtering and control tools.
9. Ad-freeCanary Mail doesn't contain any form of external advertising.
AI-Powered
Email tracking
Snooze Mail
Reminders
Email reminder
Gmail
Email template editor
Read receipts
Spam Filter
Calendar View
BlueMail
Do you think this is a good alternative?
Yes
No
Free Personal • Proprietary
Email Client
Mac
Windows
Linux
Android
iPhone
Chrome OS
Android Tablet
iPad
Apple Watch
27 alternatives to BlueMail
BlueMail is a modern, mobile first, powerful Email management tool with a sleek design, unified inbox and support for all your accounts: IMAP,Exchange,POP3.
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BlueMail Features
1. Unified inboxView e-mails (or similar) from all accounts in one unified view with BlueMail.
2. Ad-freeBlueMail doesn't contain any form of external advertising.
3. LightweightBlueMail consumes less device resources compared to similar apps.
4. Multiple Account supportBlueMail support multiple accounts without the need to logout and login
5. Calendar IntegrationBlueMail lets you sync your tasks and events with your calendar application.
IMAP Support
GDPR Compliant
POP3 Support
BlueMail vs K-9 Mail opinions
Some users think BlueMail is a great alternative to K-9 Mail, some don't.
Skiff Mail
Do you think this is a good alternative?
Yes
No
Freemium • Open Source
WebMail Provider
Email Client
Calendar App
Online
Android
iPhone
49 alternatives to Skiff Mail
Skiff Mail is private, end-to-end encrypted email. Sign up for 10 GB free storage, instant search, and total privacy.
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Skiff Mail Features
1. Ad-freeSkiff Mail doesn't contain any form of external advertising.
2. No TrackingSkiff Mail will not track you or use your personal data.
3. Dark ModeSkiff Mail supports dark mode for comfortable usage in low light conditions.
4. End-to-End EncryptionSkiff Mail has E2E Encryption, for entire or parts of the app.
5. Mail FilteringSkiff Mail classifies email messages according to specified criteria, allowing you to automatically recognize fraudulent or spam messages.
6. Cloud SyncSync your data (notes, documents, bookmarks, etc.) across your different devices and to the cloud.
7. Privacy focusedSkiff Mail is considered a privacy friendly alternative.
8. Spam FilterSkiff Mail can detect unsolicited, unwanted and virus-infected emails, calls, files, etc.
9. Real time collaborationMultiple users can work together in Skiff Mail simultaneously.
Custom Domain
Encrypted Email
Cross-device syncing
Two-factor Authentication
Email Organizer
Support for Aliases
Calendar Integration
Calendar View
Shared Folders
Reminders
TypeApp
Do you think this is a good alternative?
Yes
No
Free Personal • Proprietary
Email Client
Mac
Windows
Linux
Android
iPhone
Android Tablet
iPad
Android Wear
Kindle Fire
59 alternatives to 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 accounts.
Suggest and vote on features
TypeApp Features
1. Unified inboxView e-mails (or similar) from all accounts in one unified view with TypeApp.
2. Email OrganizerTypeApp allows you to take control of your inbox by filtering and control tools.
3. Privacy focusedTypeApp is considered a privacy friendly alternative.
4. Multiple Account supportTypeApp support multiple accounts without the need to logout and login
Live Push Notifications
Exchange
myMail
Do you think this is a good alternative?
Yes
No
Free • Proprietary
Email Client
Android
iPhone
Android Tablet
iPad
Apple Watch
24 alternatives to myMail
myMail is the smart email app for managing all your accounts on iOS and Android.
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myMail Features
1. Multiple Account supportmyMail support multiple accounts without the need to logout and login
2. Mail FilteringmyMail classifies email messages according to specified criteria, allowing you to automatically recognize fraudulent or spam messages.
3. Unified inboxView e-mails (or similar) from all accounts in one unified view with myMail.
Push Notifications
POP3 Support
IMAP Support
Mobile friendly
Filter Management
Aqua Mail
Do you think this is a good alternative?
Yes
No
Freemium • Proprietary
Email Client
Android
Android Tablet
21 alternatives to Aqua Mail
AquaMail is an email app for Internet and Exchange mail, for Android 4.0.3 and higher.
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Aqua Mail Features
1. LightweightAqua Mail consumes less device resources compared to similar apps.
2. Dark ModeAqua Mail supports dark mode for comfortable usage in low light conditions.
3. Multiple Account supportAqua Mail support multiple accounts without the need to logout and login
4. Unified inboxView e-mails (or similar) from all accounts in one unified view with Aqua Mail.
5. Support for AliasesAqua Mail supports aliases, so you can receive email without exposing your main email address
6. Works OfflineAqua Mail can be used without the need to connect to the internet.
IMAP Support
Customizable