PEPS AlternativesOnly apps categorised as Calendar Apps

The best Calendar alternative to PEPS 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 PEPS and six of them are Calendar Apps so hopefully you can find a suitable replacement. Other interesting Calendar App alternatives to PEPS are Tuta Mail, Mailbox.org, Vivaldi Mail and Kolab Now.

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PEPS 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 PEPS.

PEPS

WebMail Provider
Free • Open Source

PEPS is an open source secure email and file sharing platform.

More about PEPS

PEPS alternatives page was last updated Oct 10, 2018

Proton Mail
Secure email with absolutely no compromises, brought to you by MIT and CERN scientists.
94 Proton Mail alternatives
License model
- Freemium • Open Source
Application types
- WebMail Provider
- Email Client
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- iPad
- Tor
+6
Top Proton Mail Features
1. End-to-End Encryption
2. Privacy focused
3. Encrypted Email
4. Ad-free
5. Two-factor Authentication
6. Mobile friendly
7. No Tracking
8. Custom Domain
9. PGP Encryption
10. Dark Mode
11. Anonymous Email
12. Filters
Show all NaN Proton Mail features ▾
Proton Mail VS PEPS
Is Proton Mail a good alternative to PEPS?
- Proton Mail is the most popular Web-based, Windows, Android & Mac alternative to PEPS.
- Proton Mail is the most popular Open Source & free alternative to PEPS.
- Proton Mail is Freemium and Open SourcePEPS is Free and Open Source
- Proton Mail is Privacy focusedPEPS is not according to our users

Tuta Mail
Tuta is an all-in-one email, calendar and contacts app which protects your data with full end-to-end encryption and it requires zero personal information. Tuta is built with open source software so you can inspect every piece of code running on your devices so you can be sure...
94 Tuta Mail alternatives
License model
- Freemium • Open Source
Application types
- WebMail Provider
- Calendar App
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- iPad
- Self-Hosted
- Flathub
- F-Droid
+6
Top Tuta Mail Features
1. Privacy focused
2. Encrypted Email
3. End-to-End Encryption
4. Dark Mode
5. Custom Domain
6. Encrypted calendar
7. Contacts
8. Integrated File Sharing
9. No Tracking
10. Multiple Account support
11. Lightweight
12. Email Organizer
Show all NaN Tuta Mail features ▾
Tuta Mail VS PEPS
Is Tuta Mail a good alternative to PEPS?
- Tuta Mail is the most popular Self-Hosted alternative to PEPS.
- Tuta Mail is Freemium and Open SourcePEPS is Free and Open Source
- Tuta Mail is Privacy focused and LightweightPEPS is not according to our users

Mailbox.org
E-mail inbox, online office, cloud storage, and video conferencing. Business or personal plans. From 1 € /month (1.10 USD).
75 Mailbox.org alternatives
License model
- Paid • Proprietary
Application types
- WebMail Provider
- Email Client
Platforms
- Online
+5
Top Mailbox.org Features
1. Custom Domain
2. Privacy focused
3. PGP Encryption
4. No Tracking
5. Calendar Integration
6. Spam Filter
7. Two-factor Authentication
8. Automatic Backup
9. Real time collaboration
10. Support for Aliases
11. Cloud Sync
12. Self Destructing Messages
Show all NaN Mailbox.org features ▾
Mailbox.org VS PEPS
Is Mailbox.org a good alternative to PEPS?
- Mailbox.org is the most popular commercial alternative to PEPS.
- Mailbox.org is Paid and ProprietaryPEPS is Free and Open Source
- Mailbox.org is Privacy focusedPEPS is not according to our users

Ad
Proton Mail
Secure email with absolutely no compromises, brought to you by MIT and CERN scientists.

https://proton.me
Learn More
Vivaldi Mail
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...
92 Vivaldi Mail alternatives
License model
- Free • Proprietary
Application types
- WebMail Provider
- Email Client
Platforms
- Online
- Vivaldi
+2
Vivaldi Mail Features
1. Ad-free
2. PGP Encryption
3. Mail Filtering
4. Dark Mode
5. Calendar Integration
6. IMAP Support
7. POP3 Support
8. Encrypted Email
9. Web-Based
Show all NaN Vivaldi Mail features ▾
Vivaldi Mail VS PEPS
Is Vivaldi Mail a good alternative to PEPS?

Kolab Now
Kolab Now provides a suite of intuitive apps in a user friendly environment to make your day to day online comms easier, smarter and most importantly; secure.
77 Kolab Now alternatives
License model
- Paid • Open Source
Application types
- Calendar App
- Mail Server
Platforms
- Online
- Software as a Service (SaaS)
- DAVdroid
Kolab Now Features
1. Support for Aliases
2. Real time collaboration
3. Privacy focused
4. End-to-End Encryption
5. CalDAV Support
6. WebDAV Sync
7. CardDAV Support
Show all NaN Kolab Now features ▾
Kolab Now VS PEPS
Is Kolab Now a good alternative to PEPS?
- Kolab Now is the most popular SaaS alternative to PEPS.
- Kolab Now is Paid and Open SourcePEPS is Free and Open Source
- Kolab Now is Privacy focusedPEPS is not according to our users

mail2world
the free email that has everyone talking!.
71 mail2world alternatives
License model
- Freemium • Proprietary
Application types
- WebMail Provider
- Calendar App
Platforms
- Online
mail2world Features
Spam Filter
Bookmarks
Show all NaN mail2world features ▾
mail2world VS PEPS
Is mail2world a good alternative to PEPS?