Open Source Proton Mail Alternatives
The best open source alternative to Proton Mail is Tutanota. If that doesn't suit you, our users have ranked more than 50 alternatives to Proton Mail and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Proton Mail are Disroot, Mailbox.org, Posteo and Skiff Mail.
Proton Mail alternatives are mainly WebMail Providers but may also be Email Clients or Calendar Apps. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Proton Mail.Tutanota
Is this is a good alternative?YesNo- Freemium • Open Source
- Calendar App
- WebMail Provider
- Email Client
89 Tutanota alternatives- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- iPad
- Self-Hosted
- Flathub
- F-Droid
Tutanota is the world's most secure email service, easy to use and private by design. You get fully encrypted calendars and contacts with all our personal and business email accounts. It has open source iOS and an Android apps.
- - Tutanota is the most popular Web-based, Windows, Android & Mac alternative to Proton Mail.
- - Tutanota is the most popular Open Source & free alternative to Proton Mail.
Tutanota Features
Comments about Tutanota as a Alternative to Proton Mail
AdvikTutanota is end-to-end encrypted, as well offers 1 GB mail storage on free plan. The pro plans are cheap compared to protonmail, so it's better for low budget users
3Conner VieiraTutanota has historically been a lot more transparent, and arguably has been more honest about issues and plans
-1Ada ByronI use both, ProtonMail is more secure but also more expensive and not as user-friendly. You cannot beat the price of Tutanota for service they provide.
0prechallenging_despitousCheap easy to use good clint
-1Tutanota does not allow immediate access. Must wait 48 hours to use.
-14Disroot
Is this is a good alternative?YesNo- Free • Open Source
- WebMail Provider
27 Disroot alternatives- Online
- F-Droid
Disroot is a platform providing online services based on principles of freedom, privacy, federation and decentralization.
Disroot Features
Comments about Disroot as a Alternative to Proton Mail
Leonardo Eugenioimap smtp support, open source, all free
1Simple, efficient, you can use it with Tunderbird or other mail client.
0Kris22332Proton is not confidential at all, because it is under the influence of the EU. The best thing you can find for anonymous messaging and file sharing is the Utopia ecosystem (U.IS)
-2Mailbox.org
Is this is a good alternative?YesNo- Paid • Open Source
- WebMail Provider
- Email Client
- Calendar App
71 Mailbox.org alternatives- Online
Mailbox.org offers a secure e-mail account for home and business use. The domain name, me@mailbox.org, is easy to remember and can be understood anywhere in the world. They have been operating e-mail accounts for more than 20 years and are a highly reliable service provider.
- - Mailbox.org is the most popular commercial alternative to Proton Mail.
Mailbox.org Features
Comments about Mailbox.org as a Alternative to Proton Mail
John FastmanMailbox.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.
2Posteo
Is this is a good alternative?YesNo- Paid • Open Source
- WebMail Provider
- Email Client
- Calendar App
61 Posteo alternatives- Online
Posteo is an independent email service provider. Based in Berlin since 2009. With focus on security, privacy, and sustainability. They offer ad free paid email accounts for individuals and businesses.
Posteo Features
Comments about Posteo as a Alternative to Proton Mail
John FastmanPosteo could be a good Protonmail alternative. It offers email encryption in a similar way: Posteo's people, government surveillance and successful hackers won't get into your email content. It also offers a calendar feature, which protonmail users have been crying out for for years.
2Skiff Mail
Is this is a good alternative?YesNo- Freemium • Open Source
- WebMail Provider
- Email Client
- Calendar App
49 Skiff Mail alternatives- Online
- Android
- iPhone
Skiff Mail is private, end-to-end encrypted email. Sign up for 10 GB free storage, instant search, and total privacy.
Skiff Mail Features
Criptext
Is this is a good alternative?YesNo- Free Personal • Open Source
- Email Client
22 Criptext alternatives- Mac
- Windows
- Linux
- Android
- iPhone
Finally, an email service that's built around your privacy. Get your @criptext.com email address and see what it's like to have peace of mind and privacy in every email you send.
Criptext Features
DiscontinuedCreator recently sent and email about going solo, but since then support has been unresponsive, as have nearly all new issues on github for a year now if not more...
Comments about Criptext as a Alternative to Proton Mail
Even thought Proton Mail is a good privacy focused email, it still holds both your emails and your keys on their servers. Regarding ownership, Criptext gives the user ownership over their keys, which reside only on the user's devices. It also uses Signal Protocol for encryption which I personally like better than just using pgp.
3Kolab Now
Is this is a good alternative?YesNo- Paid • Open Source
- Calendar App
- Mail Server
- Cloud Storage Service
76 Kolab Now alternatives- Online
- Software as a Service (SaaS)
- DAVdroid
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.
- - Kolab Now is the most popular SaaS alternative to Proton Mail.
Kolab Now Features