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, Posteo, mailbox.org and Criptext.
Proton Mail alternatives are mainly WebMail Providers but may also be Calendar Apps or Email Clients. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Proton Mail.- Freemium • Open Source
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- iPad
- Self-Hosted
- F-Droid
Tutanota is a free and open source web-mail client that focuses on privacy and security. It has open source iOS and an Android apps.
Tutanota vs Proton Mail opinions
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
Tutanota is a free and open source web-mail client that focuses on privacy. There's also an Android and an iOS app. All data is stored encrypted and can not be searched, i.e. for commercial usage. It offers dead easy end-to-end encryption.
1 GB of storage is free for everyone. We want to make a secure inbox easily available for everybody worldwide.
UltraProgrammerTutanota has historically been a lot more transparent, and arguably has been more honest about issues and plans
android037I 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.
prechallenging_despitousCheap easy to use good clint
Tutanota does not allow immediate access. Must wait 48 hours to use.
BelsimaFunctions on secure browsers like Klar and Tor.
Disroot is a platform providing online services based on principles of freedom, privacy, federation and decentralization.
Disroot vs Proton Mail opinions
Simple, efficient, you can use it with Tunderbird or other mail client.
lelgenioimap smtp support, open source, all free
Web- and IMAP-based email service. 2GB cost 1€/month. Information is hosted on encrypted hard drives. Electricity from renewable resources is used.
Posteo vs Proton Mail opinions
JohnFastmanPosteo 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.
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 vs Proton Mail opinions
JohnFastmanMailbox.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.
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.
Discontinued
Creator 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...
Criptext vs Proton Mail opinions
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.
- Paid • Open Source
- 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.
- Freemium • Open Source
- Android
- iPhone
- Google Chrome
- Brave
- Firefox
- OpenPGP
Simple end-to-end encryption to secure email and attachments on Gmail, Outlook or any other email provider.
Systemli.org is a left network and technics-collective that was founded in 2003. Our aim is to provide safe and trustworthy communication services. The project addresses political activists and people who have a particular need to protect their data.
No screenshots yetTeknik was created to provide users with web services that they can trust. Services range from url shorteners to pastebins and encrypted file uploads.
No screenshots yetGPGMail is a PGP plugin for Apple Mail. It brings the functionality to sign, verify, encrypt and decrypt mails using the OpenPGP standard.
No screenshots yet