E-mail inbox, online office, cloud storage, and video conferencing. Business or personal plans. From 1 € /month (1.10 USD).
Germany
EU
+3
mailbox vs Proton Mail Comments
- mailbox is Paid and Proprietary
- mailbox is Security-focused
Proton Mail AlternativesOnly apps categorised as Mail Servers
The best Mail Server alternative to Proton Mail is mailbox. It's not free, so if you're looking for a free alternative, you could try Onion Mail or SwisMail. If that doesn't suit you, our users have ranked more than 50 alternatives to Proton Mail and eight of them are Mail Servers so hopefully you can find a suitable replacement. Other interesting Mail Server alternatives to Proton Mail are Fastmail, Purelymail, Kolab Now and PEPS.
filter to find the best alternatives
Proton Mail alternatives are mainly Mail Servers, but if you're looking for WebMail Providers or Email Clients you can filter on that. Other popular filters include Free, Open Source and Self-Hosted. These are just examples - use the filter bar below to find more specific alternatives to Proton Mail.
Alternatives list
- 82 mailbox alternatives
74 Fastmail alternativesFastmail offers secure email hosting with comprehensive webmail services, including IMAP, POP, and SMTP protocols. It supports file sharing, shared folders, large mailboxes, instant messaging, and is compatible with popular email programs. Excellent for businesses with compliance features.
Cost / License
- Paid
- Proprietary
Application types
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Flathub
- Flatpak
+6
32 Onion Mail alternativesFree encrypted & anonymous email with native Tor .onion support. Auto PGP encryption, no phone number, no KYC, no logs. Pay anonymously with Monero.
24 Purelymail alternativesPurelymail is an email hosting app that allows users to manage their emails using their preferred email client software or through the app's webmail service, which is powered by Roundcube. The app is compatible with most mail apps, supporting IMAP and POP3 protocols.
Cost / License
- Paid
- Proprietary
Application types
Platforms
- Online
- Software as a Service (SaaS)
76 Kolab Now alternativesKolab 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.
Cost / License
- Paid
- Open Source
Application types
Platforms
- Online
- Software as a Service (SaaS)
- DAVx5
Cost / License
- Freemium
- Open Source
Platforms
- Online
- Android
- iPhone
+1
Fripost – the Free Email Association. Fripost organize the people who want an alternative to "free" e-mail services where you are constantly under surveillance and personal data is handed over to third parties.
Australia
United States
Switzerland
Mailbox.org is a partial replacement for Protonmail. It offers a fully functional email solution (email, calendar, contacts), but with the added benefits of PGP encryption support (you can handle the keys or let them do it). It also allows you to send links to people who don't use PGP if you want to send private messages. For the encryption, it's a bit like Protonmail. For everything else, it's like a privacy-respecing Gmail alternative.