ProtonBlog(new window)

Proton Mail is Open Source!

Share this page

Earlier today, we released Proton Mail 2.0 to the world(new window). 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(new window).

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!

Protect your privacy with Proton
Create a free account

Share this page

Proton Team(new window)

We are scientists, engineers, and specialists from around the world drawn together by a shared vision of protecting freedom and privacy online. Proton was born out of a desire to build an internet that puts people before profits, and we're working to create a world where everyone is in control of their digital lives.

Related articles

Apple’s marketing team has built a powerful association between the iPhone and privacy. The company’s ad campaigns claim that “what happens on your iPhone, stays on your iPhone.” And, “Privacy. That’s iPhone.” But Apple’s lawyers are telling a diffe
A cyberattack on national public employment service France Travail has exposed the personal data of as many as 43 million people.  The latest breach is the second major cybersecurity attack to happen in France in the past month, raising concerns abo
If I share a folder in Google Drive, can anybody see my other folders
Google Drive makes it easy to share files and folders, but you may have wondered at some point whether the people you’ve shared a folder with can see your other folders. We answer this question below and also share some tips for truly secure link sha
In 2014, Proton Mail was introduced as a web app, revolutionizing how we think about email privacy. Today, we’re excited to broaden the horizons of secure communication by launching the Proton Mail desktop app. Anyone can now use the new Proton Mail
what is a digital footprint
What you do online isn’t private. Everything you do leaves behind some kind of mark. This trail is often referred to as a digital footprint, and it’s used to track you in many different ways. In this article, we go over what a digital footprint is, h
In February 2024, media reported that Indian authorities may decide to block Proton Mail. Proton Mail is still available in India despite any reports suggesting otherwise.  In response to hoax bomb threats that were sent through Proton Mail, some me