Unofficial ProtonMail extension. Provides notifications and makes it possible to close the ProtonMail tab, and even the browser, without getting logged out.
Cost / License
- Free
- Open Source
Platforms
- Online
- ProtonMail
- Google Chrome
- Firefox
+2
Open Source Proton Mail Alternatives
The best open source alternative to Proton Mail is Tuta Mail. If that doesn't suit you, our users have ranked more than 100 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 Posteo, Disroot, Infomaniak kMail and FlowCrypt.
filter to find the best alternatives
Proton Mail alternatives are mainly WebMail Providers, but if you're looking for Email Clients or Mail Servers 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
Cost / License
- Freemium
- Open Source
Platforms
- Online
- Android
- iPhone
+1
Galae is a secure email service focused on deliverability, self-management and interoperability. It totally relies on free/libre opensource software.
GPGMail is a PGP plugin for Apple Mail. It brings the functionality to sign, verify, encrypt and decrypt mails using the OpenPGP standard.
Cost / License
- Paid
- Open Source
Platforms
- Mac
- GPGTools
- Apple Mail
Anonymous peer-to-peer distributed communication layer built with open source tools and designed to run any traditional Internet service such as email, IRC or web hosting.
Cost / License
- Free
- Open Source
Application type
Alerts
- Discontinued
Platforms
- Online
- Self-Hosted
N
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.
Cost / License
- Free
- Open Source
Application type
Alerts
- Discontinued
Platforms
- Mac
- Windows
- Linux
- Google Chrome
- Thunderbird
- SeaMonkey
- Chromium
- Firefox
- OpenPGP
+1
6 Aster Mail alternativesAster is a privacy-focused, quantum-safe, end-to-end encrypted email service. Unlike other encrypted email providers, Aster uses standard OpenPGP (RSA-4096) with portable keys that work in GPG, Thunderbird, or any other PGP client.
+2
- Senders send messages stamped with Bitcoin ecash to Nostr relays. The Nostr relays collect the Bitcoin ecash, then deliver messages to receivers.
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