Proton Mail AlternativesOnly Open Source apps categorised as WebMail Providers

Alternatives list

1. 

   

   Tuta Mail

    563 likes

   Offers comprehensive encryption for email, calendar, and contacts with zero personal info required. Built on open source, install via Play Store, F-Droid, or APK, with Tor and VPN support. Both free and paid plans; utilizes quantum-resistant encryption ensuring privacy-focused, anonymous usage.

   109 Tuta Mail alternatives

   Cost / License

   • Freemium
   • Open Source (GPL-3.0)

   Application types

   • WebMail Provider
   • Email Client

   Origin

   • Germany
   • EU

   Platforms

   • Mac
   • Windows
   • Linux
   • Online
   • Android
   • iPhone
   • iPad
   • Flathub
   • F-Droid
   • Android Tablet
   • Thunderbird

   

   

   

   +1

   

   More about Tuta Mail  

   

   Is Tuta Mail a good alternative to Proton Mail?

    

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   Tuta Mail vs Proton Mail Comments

    

   Top Positive Comment

   Belsima

   May 21, 2018

   10

   Functions on secure browsers like Klar and Tor.

   Advik

   Positive comment•Feb 1, 2022

   3

   Tutanota 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

   Conner Vieira

   Positive comment•Sep 13, 2021

   -1

   Tutanota has historically been a lot more transparent, and arguably has been more honest about issues and plans

   Show more comments

   3 of 10 comments

   

   

   • Tuta Mail is Freemium and Open SourceProton Mail is also Freemium and Open Source
   • Tuta Mail is LightweightProton Mail is not according to our users
2. 

   

   Posteo

    89 likes

   Web- and IMAP-based email service. 4GB cost 1€/month. Information is hosted on encrypted hard drives. Electricity from renewable resources is used.

   79 Posteo alternatives

   Cost / License

   • Paid
   • Open Source

   Application types

   • WebMail Provider
   • Email Client

   Origin

   • Germany
   • EU

   Platforms

   • Online

   

   

   

   +9

   

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   Posteo vs Proton Mail Comments

    

   John Fastman

   Positive comment•Apr 28, 2018

   2

   Posteo 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.

   

   

   • Posteo is Paid and Open SourceProton Mail is Freemium and Open Source
   • Posteo is Security-focusedProton Mail is not according to our users
4. 

   

   Disroot

    120 likes

   Disroot is a platform providing online services based on principles of freedom, privacy, federation and decentralization.

   46 Disroot alternatives

   Cost / License

   • Free
   • Open Source

   Application type

   • WebMail Provider

   Origin

   • Netherlands
   • EU

   Platforms

   • Online
   • F-Droid

   

   

   More about Disroot  

   

   Is Disroot a good alternative to Proton Mail?

    

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   3comments

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   Disroot vs Proton Mail Comments

    

   Leonardo Eugenio

   Positive comment•Jun 7, 2019

   2

   imap smtp support, open source, all free

   Guest

   Positive comment•Jul 8, 2019

   0

   Simple, efficient, you can use it with Tunderbird or other mail client.

   Review by a new / low-activity user.

   Kris22332

   Positive comment•Sep 3, 2022

   -3

   Proton 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)

   

   

   • Disroot is Free and Open SourceProton Mail is Freemium and Open Source
   • Disroot is DecentralizedProton Mail is not according to our users
5. Ad

   

   

   Infomaniak kMail

   Privacy-focused Swiss email system provides 20 GB free storage, supports custom domains and unlimited storage, syncs contacts and calendars, is ad-free, and is part of a secure productivity suite used by over a million users acro...

   https://www.infomaniak.com

   Learn More
6. 

   

   Infomaniak kMail

    48 likes

   Privacy-focused Swiss email system provides 20 GB free storage, supports custom domains and unlimited storage, syncs contacts and calendars, is ad-free, and is part of a secure productivity suite used by over a million users across Europe on all devices.

   50 Infomaniak kMail alternatives

   Cost / License

   • Freemium
   • Open Source (GPL-3.0)

   Application types

   • WebMail Provider
   • Email Client

   Origin

   • Switzerland

   Platforms

   • Online
   • Android
   • iPhone
   • Android Tablet
   • iPad
   • F-Droid

   

   

   

   +8

   

   More about Infomaniak kMail  

   

   Is Infomaniak kMail a good alternative to Proton Mail?

    
7. 

   

   Kolab Now

    43 likes

   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.

   76 Kolab Now alternatives

   Cost / License

   • Paid
   • Open Source

   Application types

   • WebMail Provider
   • Mail Server

   Origin

   • Switzerland

   Platforms

   • Online
   • Software as a Service (SaaS)
   • DAVx5

   

   

   

   More about Kolab Now  

   

   Is Kolab Now a good alternative to Proton Mail?

    
8. 

   

   Forward Email

    8 likes

   Forward Email is the best email service, encrypted email service, and fastest email service. It supports unlimited domains and aliases for no extra cost. It uses quantum safe ChaCha20-Poly1305 encryption and offers SMTP, IMAP, POP3, email webhooks, email regular expressions...

   Cost / License

   • Freemium
   • Open Source (MPL-2.0)

   Application type

   • WebMail Provider

   Origin

   • United States

   Platforms

   • Self-Hosted
   • Online

   

   More about Forward Email  

   

   Is Forward Email a good alternative to Proton Mail?

    

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   Forward Email vs Proton Mail Comments

    

   linuxplayer

   Negative comment•Jul 7, 2024

   1

   Needs an existing email to be used for free. You have to pay to create an email.

   

   

   • Forward Email is Freemium and Open SourceProton Mail is also Freemium and Open Source
10. 

    

    Swisscows.email

     5 likes

    Swisscows.email is another product of Swisscows AG. This product offers you secure email traffic. With Swisscows.email you can send your emails encrypted so that absolutely no one can read them. The service is comparable to a letter that is protected from prying eyes in an...

    57 Swisscows.email alternatives

    Cost / License

    • Paid
    • Open Source

    Application types

    • WebMail Provider
    • Email Client

    Origin

    • Switzerland

    Platforms

    • Online
    • iPhone
    • iPad
    • Android
    • Android Tablet

    

    

    

    +6

    

    More about Swisscows.email  

    

    Is Swisscows.email a good alternative to Proton Mail?

     
11. 

    

    Zero Email

     6 likes

    Zero is an open-source AI email solution that gives users the power to self-host their own email app while also integrating external services like Gmail and other email providers. Our goal is to modernize and improve emails through AI agents to truly modernize emails.

    52 Zero Email alternatives

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    • WebMail Provider

    Origin

    • United States

    Platforms

    • Online
    • Self-Hosted
    • Docker

    

    

    More about Zero Email  

    

    Is Zero Email a good alternative to Proton Mail?

     
12. 

    

    Cloud Mail

     2 likes

    Cloudflare Workers-based email solution providing multiple address generation, attachment storage via R2, responsive web interface, RBAC management, Resend bulk email, Telegram or third-party forwarding, verification code recognition, and ECharts analytics.

    20 Cloud Mail alternatives

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    • WebMail Provider

    Origin

    • China

    Platforms

    • Self-Hosted

    

    

    

    +1

    

    More about Cloud Mail  

    

    Is Cloud Mail a good alternative to Proton Mail?

     
13. 

    

    Galae

     1 like

    Galae is a secure email service focused on deliverability, self-management and interoperability. It totally relies on free/libre opensource software.

    Cost / License

    • Paid
    • Open Source (GPL-3.0)

    Application type

    • WebMail Provider

    Origin

    • France
    • EU

    Platforms

    • Online
    • Software as a Service (SaaS)

    

    Is Galae a good alternative to Proton Mail?

     
14. 

    

    I2P Mail

     1 like

    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

    • WebMail Provider

    Platforms

    • Online
    • I2P

    

    More about I2P Mail  

    

    Is I2P Mail a good alternative to Proton Mail?

     
15. 

    

    PEPS

     9 likes

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

    Cost / License

    • Free
    • Open Source (AGPL-3.0)

    Application type

    • WebMail Provider

    Alerts

    • Discontinued

    Platforms

    • Linux

    

    More about PEPS  

    

    Is PEPS a good alternative to Proton Mail?