Mailbox Alternatives

Mailbox is described as 'completely redesigned inbox that makes email light, fast, and mobile-friendly. Quickly swipe messages to your archive or trash. Scan an entire conversation at once with chat-like organization' and is a Email Client in the office & productivity category. There are more than 25 alternatives to Mailbox for a variety of platforms, including Mac, Windows, iPhone, iPad and Android. The best alternative is Thunderbird, which is both free and Open Source. Other great apps like Mailbox are K-9 Mail, Microsoft Office Outlook, Spark Mail and Utopia.

Mailbox alternatives are mainly Email Clients but may also be Calendar Apps or Instant Messengers. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Mailbox.

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Mailbox

Free • Proprietary
Email Client

Mac
Android
iPhone
iPad

Mailbox is a completely redesigned inbox that makes email light, fast, and mobile-friendly. Quickly swipe messages to your...

Learn more about Mailbox

Mailbird
Sponsored
Paid • Proprietary
Email Client
Windows
64 alternatives to Mailbird
Mailbird helps individuals and businesses manage emails in one place. This allows you to simplify your workflows. Therefore, spend more time on important tasks. Moreover, 9 in 10 of our customers describe our interface as “intuitive” and beautiful.
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Mailbird Features
1. Dark ModeMailbird supports dark mode for comfortable usage in low light conditions.
2. Unified inboxView e-mails (or similar) from all accounts in one unified view with Mailbird.
3. Multiple Account supportMailbird support multiple accounts without the need to logout and login
4. Email template editorMailbird offers pre-defined email layouts so you can add content or customize your own templates.
5. Email OrganizerMailbird allows you to take control of your inbox by filtering and control tools.
Clean design
Sync Contacts
Undo send
Email tracking
GSuite Integration
Slack integration
Asana integration
Unified communications
Multi Account Switching
Graphical User Interface
Thunderbird
Do you think this is a good alternative?
Yes
No
Free • Open Source
Email Client
Calendar App
Mac
Windows
Linux
BSD
AppImageHub
Snapcraft
Flathub
PortableApps.com
Haiku
Homebrew
Chocolatey
93 alternatives to Thunderbird
Thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after Mozilla Firefox.
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Thunderbird Features
1. Extensible by Plugins/ExtensionsThunderbird can be extended with add-ons, plugins and extensions.
2. Multiple Account supportThunderbird support multiple accounts without the need to logout and login
3. Calendar IntegrationThunderbird lets you sync your tasks and events with your calendar application.
4. Email OrganizerThunderbird allows you to take control of your inbox by filtering and control tools.
5. Dark ModeThunderbird supports dark mode for comfortable usage in low light conditions.
6. Import/Export OPML FeedsImport and export your feed subscriptions into OPML format with Thunderbird.
7. PortableThunderbird can be used from a USB stick or similar with no prior installation.
8. Support for ThemesYou can use themes and templates to change the look and feel of Thunderbird.
9. Integrated Password ManagerThunderbird lets you access all the passwords you’ve saved across your different devices.
IMAP Support
SMTP Support
FOSS
Built-in RSS reader
POP3 Support
Add-ons
Intuitive
Graphical User Interface
Customizable
Built-in Calendar
K-9 Mail
Do you think this is a good alternative?
Yes
No
Free • Open Source
Email Client
Android
Android Tablet
F-Droid
46 alternatives to 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 notifications and more.
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K-9 Mail Features
1. Ad-freeK-9 Mail doesn't contain any form of external advertising.
2. Multiple Account supportK-9 Mail support multiple accounts without the need to logout and login
3. Privacy focusedK-9 Mail is considered a privacy friendly alternative.
4. PGP EncryptionK-9 Mail supports PGP, an encryption system used for sending encrypted emails and files.
IMAP Support
Configurable
POP3 Support
One view multiple accounts
Contacts
Custom notifications
Header sorting
Exchange
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
Spark Mail
Do you think this is a good alternative?
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
Spark Mail vs Mailbox opinions
pros, cons and recent comments
Goldmaster
Has a clean and modern design, can snooze, pin and schedule emails like in mailbox. Has swiping gestures. It's free to use and can even share emails as a link.
Negative comment•
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Utopia
Do you think this is a good alternative?
Yes
No
Free • Proprietary
Instant Messenger
Encrypted Chat App
Group Chat App
Mac
Windows
Linux
42 alternatives to Utopia
Utopia P2P Ecosystem. Utopia is a feature-rich platform that is specifically designed to protect privacy of communication, confidentiality, and security of personal data. Utopia is a decentralized network, with no central server involved in data transmission or storage.
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Utopia Features
1. No TrackingUtopia will not track you or use your personal data.
2. DecentralizedUtopia is based on a decentralized infrastructure with no single entity controlling it.
3. AES-256 EncryptionUtopia has AES-256 Encryption, i.e. very strong security.
4. VoiP CallsUtopia allows you to make voice calls over Internet using the Voice over Internet Protocol (VoIP).
Encrypted Email
P2P Network
Own crypto currency (CRP)
Multiple languages
In-built Cryptocurrency Cryptons (CRP)
App lock option
Encrypted database
Integrated Web Browser
Todoist integration
In-built voice-synthesizer
eM Client
Do you think this is a good alternative?
Yes
No
Freemium • Proprietary
Email Client
Calendar App
Mac
Windows
64 alternatives to 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, notes and chat.
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eM Client Features
1. Calendar IntegrationeM Client lets you sync your tasks and events with your calendar application.
2. Multiple Account supporteM Client support multiple accounts without the need to logout and login
3. PGP EncryptioneM Client supports PGP, an encryption system used for sending encrypted emails and files.
4. Dark ModeeM Client supports dark mode for comfortable usage in low light conditions.
5. Unified inboxView e-mails (or similar) from all accounts in one unified view with eM Client.
6. Cloud SyncSync your data (notes, documents, bookmarks, etc.) across your different devices and to the cloud.
7. Email OrganizereM Client allows you to take control of your inbox by filtering and control tools.
8. Sync with Google CalendareM Client can be synchronized with Google Calendar
9. Automatic BackupeM Client will automatically back up your data periodically.
IMAP Support
Exchange
CardDAV Support
CalDAV Support
Contacts
Gmail integration
Calendar Sync
POP3 Support
Email preview
Sync Contacts
Mailbird
Do you think this is a good alternative?
Yes
No
Paid • Proprietary
Email Client
Windows
64 alternatives to Mailbird
Mailbird helps individuals and businesses manage emails in one place. This allows you to simplify your workflows. Therefore, spend more time on important tasks. Moreover, 9 in 10 of our customers describe our interface as “intuitive” and beautiful.
Suggest and vote on features
Mailbird Features
1. Dark ModeMailbird supports dark mode for comfortable usage in low light conditions.
2. Unified inboxView e-mails (or similar) from all accounts in one unified view with Mailbird.
3. Multiple Account supportMailbird support multiple accounts without the need to logout and login
4. Email template editorMailbird offers pre-defined email layouts so you can add content or customize your own templates.
5. Email OrganizerMailbird allows you to take control of your inbox by filtering and control tools.
Clean design
Sync Contacts
Undo send
Email tracking
GSuite Integration
Slack integration
Asana integration
Unified communications
Multi Account Switching
Graphical User Interface
Claws Mail
Do you think this is a good alternative?
Yes
No
Free • Open Source
Email Client
Calendar App
News Reader
Windows
Linux
BSD
88 alternatives to 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 Robustness and stability.
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Claws Mail Features
1. LightweightClaws Mail consumes less device resources compared to similar apps.
2. Extensible by Plugins/ExtensionsClaws Mail can be extended with add-ons, plugins and extensions.
3. Multiple Account supportClaws Mail support multiple accounts without the need to logout and login
4. No registration requiredYou can use most of the features in Claws Mail without registration.
5. Import/Export OPML FeedsImport and export your feed subscriptions into OPML format with Claws Mail.
6. Spam FilterClaws Mail can detect unsolicited, unwanted and virus-infected emails, calls, files, etc.
7. PortableClaws Mail can be used from a USB stick or similar with no prior installation.
IMAP Support
Customizable
Multiple languages
Integrated Email Client
Content Filtering
Built-in RSS reader
Microsoft Mail and Calendar
Do you think this is a good alternative?
Yes
No
Free • Proprietary
Email Client
Calendar App
Windows
91 alternatives to Microsoft Mail and Calendar
Windows 10 has Mail and Calendar apps already built in.
Suggest and vote on features
Microsoft Mail and Calendar Features
1. Unified inboxView e-mails (or similar) from all accounts in one unified view with Microsoft Mail and Calendar.
Run in background
Bundled with Windows
Email tracking