OnMail AlternativesOnly apps categorised as Calendar Apps
The best Calendar alternative to OnMail is Proton Mail, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 10 alternatives to OnMail and five of them are Calendar Apps so hopefully you can find a suitable replacement. Other interesting Calendar App alternatives to OnMail are Microsoft Outlook, Mailbox.org, Fastmail and Vivaldi Mail.
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OnMail alternatives are mainly WebMail Providers but may also be Email Clients or Calendar Apps. Filter by these or use the filter bar below if you want a narrower list of alternatives or looking for a specific functionality of OnMail.- Freemium • Proprietary
- 871 likes94 Proton Mail alternatives
Proton Mail provides secure email services with end-to-end encryption, ensuring data protection. Swiss-based and outside US jurisdiction, it offers a free version to champion privacy as a human right. Fully accessible on any device.
License model
- Freemium • Open Source
Application types
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- iPad
- Tor
Proton Mail VS OnMail
Is Proton Mail a good alternative to OnMail? - 394 likes136 Microsoft Outlook alternatives
Streamline emails, calendars, contacts, and task management with a smart inbox prioritizing critical messages. Includes calendar scheduling, third-party app integration like Facebook, Dropbox, and Trello, and support for Microsoft Exchange, Outlook.com, and Gmail, ensuring efficient task and email handling.
License model
- Paid • Proprietary
Application types
Platforms
- Mac
- Windows
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Apple Watch
- Android Wear
Top Microsoft Outlook Features
Microsoft Outlook VS OnMail
Is Microsoft Outlook a good alternative to OnMail? - 59 likes75 Mailbox.org alternatives
E-mail inbox, online office, cloud storage, and video conferencing. Business or personal plans. From 1 € /month (1.10 USD).
Mailbox.org VS OnMail
Is Mailbox.org a good alternative to OnMail? - 68 likes66 Fastmail alternatives
Fastmail provides one of the most secure and reliable email environments in the industry. Rock Solid Reliability. More safety.
License model
- Paid • Proprietary
Application types
Platforms
- Online
- Android
- iPhone
- Android Tablet
- iPad
Fastmail VS OnMail
Is Fastmail a good alternative to OnMail? - 32 likes92 Vivaldi Mail alternatives
Vivaldi Mail is a free email service with no ads and no strings attached developed by Vivaldi Technologies. It also offers contacts and calendar features, search capabilities, folders management, WEB/POP/IMAP access, 10GB of storage capacity, 20 MB of maximum attachment size...
Vivaldi Mail Features
Vivaldi Mail VS OnMail
Is Vivaldi Mail a good alternative to OnMail?