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Proton Mail is Open Source!

Proton Team

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Earlier today, we released Proton Mail 2.0 to the world. We are happy to announce that we are also releasing Proton Mail 2.0 as open source software! From the beginning, we have been strong proponents of open source software and the core cryptography libraries that we develop and use have been open source from day one.

Today, we are happy to take the next step and completely open source our webmail interface. This means all the Proton Mail code that runs on your computer is now available for inspection. We hope that by opening up our platform, we will encourage additional contributors to help us make Proton Mail the world’s most secure email service.

Our move to open source has actually been coming for a long time. While it would have also been possible to open source Proton Mail 1.x, we felt that such a move was not appropriate given that the code was intended to be deprecated. By open sourcing Proton Mail 2.0, we are open sourcing the future of Proton Mail. As we continue to expand our private email service with mobile apps, you can look forward to more open source announcements as our code base matures.

Proton Mail 2.0 can be viewed online on Github at the link below. As a nod to our CERN and MIT roots, we are releasing under the permissive MIT license. Let us know if you do something cool with our code.

https://github.com/ProtonMail/WebClient(new window)

We welcome all feedback at security@proton.me and look forward to continuing to improve Proton Mail with your help!

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