Proton Mail (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Proton Mail" in English language version.

refsWebsite

Global rank English rank

55web.archive.org

1^st place

27proton.me

low place

4github.com

383^rd place

320^th place

2x.com

low place

2reddit.com

1,082^nd place

764^th place

2archive.today

14^th place

2reuters.com

49^th place

47^th place

2lovieawards.com

low place

1doi.org

2^nd place

1semanticscholar.org

11^th place

8^th place

1vice.com

175^th place

137^th place

1wired.com

193^rd place

152^nd place

1worldcat.org

5^th place

1gizmodo.com

474^th place

329^th place

1infosecurity-magazine.com

low place

1bit-tech.net

low place

9,620^th place

1dailydot.com

998^th place

632^nd place

1theregister.co.uk

1,216^th place

797^th place

1protonmail.com

low place

1simplelogin.io

low place

1ghacks.net

low place

7,914^th place

1theverge.com

114^th place

90^th place

1omgubuntu.co.uk

low place

1techcrunch.com

187^th place

146^th place

1xda-developers.com

5,669^th place

3,664^th place

1stackexchange.com

1,983^rd place

1,330^th place

1thehackernews.com

low place

1itpro.com

low place

1pcmag.com

1,060^th place

700^th place

1techradar.com

1,521^st place

944^th place

1nzz.ch

687^th place

2,985^th place

1techspot.com

7,139^th place

4,608^th place

1kommersant.ru

176^th place

1,455^th place

1themoscowtimes.com

1,388^th place

972^nd place

1interfax.ru

855^th place

3,493^rd place

1ria.ru

183^rd place

1,107^th place

1hindustantimes.com

71^st place

52^nd place

archive.today

"The 6th Annual Lovie Award Winners Announced". The Lovie Awards (Press release). International Academy of Digital Arts and Sciences. September 27, 2016. Archived from the original on August 12, 2023. Retrieved August 12, 2023.
"2017 Winners Gallery". The Lovie Awards. International Academy of Digital Arts and Sciences. 2017. Archived from the original on August 12, 2023. Retrieved August 12, 2023.

bit-tech.net

Halfacree, Gareth (July 1, 2014). "ProtonMail hit by PayPal account freeze". bit-tech. Archived from the original on November 20, 2018. Retrieved October 19, 2015.

dailydot.com

Howell O'Neill, Patrick (July 1, 2014). "PayPal freezes account of email encryption startup Proton Mail [Update]". The Daily Dot. Archived from the original on June 18, 2019. Retrieved October 19, 2015.

doi.org

Saxena, Kumkum; Rajdev, Dev; Bhatia, Divesh; Bahl, Manav (June 25–27, 2021). "ProtonMail: Advance Encryption and Security". 2021 International Conference on Communication information and Computing Technology (ICCICT). pp. 1–6. doi:10.1109/ICCICT50803.2021.9510041. ISBN 978-1-6654-0430-3. S2CID 237000409.

ghacks.net

Brinkmann, Martin (February 22, 2023). "The new Proton Mail Bridge is a major improvement - gHacks Tech News". gHacks Technology News. Retrieved February 26, 2025.

github.com

"iOS mobile app repository". github.com/ProtonMail/ios-mail. Proton AG. Archived from the original on November 1, 2019. Retrieved May 25, 2024.
"Android mobile app repository". github.com/ProtonMail/android-mail. Proton AG. Archived from the original on May 26, 2024. Retrieved May 25, 2024.
"Proton bridge repository". github.com/ProtonMail/proton-bridge. Proton AG. Archived from the original on April 17, 2020. Retrieved May 25, 2024.
"LICENSE". github.com/ProtonMail/WebClient. Proton AG. December 25, 2021. Archived from the original on December 25, 2021. Retrieved May 25, 2024.

gizmodo.com

"Proton Mail Unveils an Overdue Makeover and New Features". Gizmodo. June 8, 2021. Archived from the original on April 7, 2022. Retrieved July 6, 2021.

hindustantimes.com

HC: Take steps to block Proton Mail in India Hindustan Times, Ayesha Arvind, April 30, 2025

infosecurity-magazine.com

"Über-Secure ProtonMail Beta Maxes Out Servers in Just 60 Hours". Infosecurity Magazine. May 22, 2014. Archived from the original on November 7, 2018. Retrieved October 19, 2015.

interfax.ru

"Proton Mail не получала просьб о помощи в поисках лжеминеров". Interfax.ru (in Russian). January 29, 2020. Archived from the original on January 29, 2020. Retrieved January 29, 2020.

itpro.com

Graw, Michael (October 5, 2022). "ProtonMail review". IT Pro. Archived from the original on August 12, 2023. Retrieved August 12, 2023.

kommersant.ru

"Почтовый сервис Proton Mail заблокировали в России из-за сообщений о минированиях". www.kommersant.ru (in Russian). January 29, 2020. Archived from the original on January 29, 2020. Retrieved January 29, 2020.

lovieawards.com

"The 6th Annual Lovie Award Winners Announced". The Lovie Awards (Press release). International Academy of Digital Arts and Sciences. September 27, 2016. Archived from the original on August 12, 2023. Retrieved August 12, 2023.

winners.lovieawards.com

"2017 Winners Gallery". The Lovie Awards. International Academy of Digital Arts and Sciences. 2017. Archived from the original on August 12, 2023. Retrieved August 12, 2023.

nzz.ch

Silva, Gioia da (August 3, 2021). ""Wenn du noch einmal das Wort Impfpflicht in den Mund nimmst, schlage ich dir und deiner Frau die Zähne aus": Der Schweizer Service ProtonMail wird immer wieder für Drohungen missbraucht" ["If you say the word compulsory vaccination again, I'll knock your and your wife's teeth out": The Swiss service Proton Mail is repeatedly misused for threats]. Neue Zürcher Zeitung (in Swiss High German). Archived from the original on May 13, 2024. Retrieved September 10, 2021.

omgubuntu.co.uk

Sneddon, Joey (March 14, 2024). "Proton Mail's New Desktop App is Available for Linux". OMG! Ubuntu. Archived from the original on April 1, 2024. Retrieved April 1, 2024.

pcmag.com

Rubenking, Neil J. (August 18, 2023). "Proton Mail Review". PCMag. Archived from the original on August 24, 2023. Retrieved March 24, 2025.

proton.me

"Privacy policy". Archived from the original on September 5, 2021. Retrieved May 28, 2022.
Yen (April 18, 2023). "There are now over 100 million Proton Accounts". proton.me. Archived from the original on April 18, 2023. Retrieved December 18, 2023.
"Why Proton Mail is in Switzerland". Proton. May 19, 2014. Archived from the original on July 6, 2022. Retrieved May 28, 2022.
"Fighting Censorship with Proton Mail Encrypted Email Over Tor". Proton Mail Blog. January 19, 2017. Archived from the original on May 28, 2022. Retrieved January 20, 2017.
"Proton Mail goes Open Source with version 2.0". Proton Mail Blog. August 13, 2015. Archived from the original on May 28, 2022. Retrieved January 31, 2016.
"Proton Mail iOS app is open source". Proton Mail Blog. October 30, 2019. Archived from the original on May 28, 2022. Retrieved December 12, 2019.
"The Proton Mail Android app is open source". Proton Mail Blog. April 23, 2020. Archived from the original on May 28, 2022. Retrieved April 24, 2020.
"Proton Mail Bridge is open source on macOS, Windows, and Linux". Proton Mail Blog. April 15, 2020. Archived from the original on May 28, 2022. Retrieved April 24, 2020.
"Proton Mail raises a record $500,000 through crowdfunding to disrupt the state of email communications". Proton. July 29, 2014. Archived from the original on December 3, 2023. Retrieved May 13, 2024. Proton Mail's crowdfunding campaign has surged past $500,000 with the support of over 10,000 backers
Yen, Andy (June 30, 2014). "Paypal Freezes Proton Mail Campaign Funds". Proton Mail Blog. Archived from the original on May 28, 2022. Retrieved October 19, 2015.
"Announcement: Proton Mail has launched worldwide!". Proton Mail Blog. March 17, 2016. Archived from the original on May 28, 2022. Retrieved July 21, 2016.
"Introducing Proton Mail Contacts – the world's first encrypted contacts manager". Proton Mail Blog. November 21, 2017. Archived from the original on May 28, 2022. Retrieved May 28, 2022.
M., Irina (December 6, 2017). "Introducing Proton Mail Bridge, email encryption for Outlook, Thunderbird, and Apple Mail". Proton Mail Blog. Archived from the original on May 28, 2022. Retrieved December 16, 2017.
"Introducing Address Verification and Full PGP Support - Proton Mail Blog". Proton Mail Blog. July 25, 2018. Archived from the original on May 28, 2022. Retrieved September 28, 2018.
Yen, Andy (November 7, 2022). "Proton and SimpleLogin are joining forces". Proton. Archived from the original on June 17, 2023. Retrieved December 14, 2023. We have been following SimpleLogin closely for a long time as many Proton Mail users utilize it to prevent their Proton Mail addresses from being leaked to spammers
"Introducing proton.me, a new email domain for Proton Mail". Proton. April 7, 2022. Retrieved February 26, 2025.
"A new visual universe for Proton". Proton. May 25, 2022. Retrieved February 26, 2025.
"Introducing the Proton Mail desktop app". Proton. March 14, 2024. Archived from the original on April 1, 2024. Retrieved April 1, 2024.
"Introducing Proton Scribe, a private writing assistant that writes and proofreads emails for you". Proton. July 18, 2024. Retrieved December 8, 2024.
Yen, Andy (September 22, 2015). "Proton Mail adds Facebook PGP integration". Proton Mail Blog. Archived from the original on May 28, 2022. Retrieved October 19, 2015.
"Proton Mail Security Details". Proton Mail Security. January 31, 2016. Archived from the original on October 11, 2023. Retrieved January 31, 2016.
Sustaining Proton’s mission over time |https://proton.me/blog/sustaining-mission-over-time
"Proton Privacy Policy". proton.me. May 25, 2022. Archived from the original on September 5, 2021. Retrieved September 10, 2021.
"Privacy Decrypted #4: Understanding anonymity vs. privacy". Proton. October 22, 2021. Retrieved February 26, 2025.
"Transparency Report". proton.me. September 10, 2021. Archived from the original on August 25, 2022. Retrieved September 10, 2021.
"Important clarifications regarding arrest of climate activist". proton.me. September 6, 2021. Archived from the original on May 28, 2022. Retrieved September 10, 2021.
"Is Proton Mail blocked in Belarus?". Proton Mail Blog. November 15, 2019. Archived from the original on November 17, 2019. Retrieved September 14, 2022.

protonmail.com

"Securitum Security Report" (PDF). Proton mail blog. Archived from the original (PDF) on July 5, 2021.

reddit.com

"Proton Mail responds on Reddit". April 2, 2019. Archived from the original on November 14, 2020. Retrieved September 24, 2020. We don't plan to open source the back-end code, because it doesn't add trust (users can't verify what code is running on the backend) and doing so would given away information about how we do anti-spam and anti-abuse.
"We are rolling out technologies which will help us better overcome attempts to block Proton Mail". Reddit. March 13, 2020. Archived from the original on November 14, 2020. Retrieved March 14, 2020.

reuters.com

Shields, Michael (October 22, 2021). "Secure email group Proton wins Swiss appeal over surveillance rules". Reuters. Archived from the original on October 17, 2023. Retrieved May 26, 2022.
Tsydenova, Nadezhda; Ivanova, Polina (January 29, 2020). Heinrich, Mark (ed.). "Russia blocks encrypted email service Proton Mail". Reuters. Archived from the original on January 30, 2020. Retrieved January 30, 2020.

ria.ru

"Россия не обращалась за информацией о "минерах", заявили в Proton Mail". РИА Новости (in Russian). January 29, 2020. Archived from the original on January 29, 2020. Retrieved January 29, 2020.

semanticscholar.org

api.semanticscholar.org

Saxena, Kumkum; Rajdev, Dev; Bhatia, Divesh; Bahl, Manav (June 25–27, 2021). "ProtonMail: Advance Encryption and Security". 2021 International Conference on Communication information and Computing Technology (ICCICT). pp. 1–6. doi:10.1109/ICCICT50803.2021.9510041. ISBN 978-1-6654-0430-3. S2CID 237000409.

simplelogin.io

"SimpleLogin joins the Proton family". SimpleLogin. April 8, 2022. Archived from the original on December 5, 2023. Retrieved December 14, 2023.

stackexchange.com

security.stackexchange.com

Stockman, Jason (May 22, 2014). "How are Proton Mail keys distributed?". Stack Exchange. Archived from the original on November 15, 2018. Retrieved October 19, 2015.

techcrunch.com

Sawers, Paul (March 14, 2024). "Proton Mail desktop app officially launches, but remains for premium subscribers only". TechCrunch. Archived from the original on April 1, 2024. Retrieved April 1, 2024.

techradar.com

Athow, Desire (June 16, 2023). "Proton Mail review". TechRadar. Archived from the original on August 12, 2023. Retrieved August 12, 2023.

techspot.com

"Proton Mail provided user data that led to an arrest in Spain". TechSpot. May 14, 2024. Archived from the original on May 14, 2024. Retrieved May 14, 2024.

thehackernews.com

Khandelwal, Swati (May 26, 2014). "Proton Mail: 'NSA-Proof' End-to-End Encrypted Email Service". The Hacker News. Archived from the original on November 7, 2018. Retrieved October 19, 2015.

themoscowtimes.com

"Russia Blocks Encrypted Swiss Email Service Proton Mail". The Moscow Times. Reuters. January 29, 2020. Archived from the original on January 29, 2020. Retrieved January 29, 2020.

theregister.co.uk

Martin, Alexander J. (January 19, 2017). "Proton Mail launches Tor hidden service to dodge totalitarian censorship". The Register. Archived from the original on January 20, 2017.

theverge.com

Khalid, Amrita (December 14, 2023). "Proton Mail finally gets a desktop app for encrypted email and calendar". The Verge. Archived from the original on April 1, 2024. Retrieved April 1, 2024.

vice.com

"ProtonMail, the Easy-to-Use Encrypted Email Service, Opens Up to the Public". March 17, 2016. Archived from the original on July 2, 2016. Retrieved March 18, 2016.

web.archive.org

"Privacy policy". Archived from the original on September 5, 2021. Retrieved May 28, 2022.
Yen (April 18, 2023). "There are now over 100 million Proton Accounts". proton.me. Archived from the original on April 18, 2023. Retrieved December 18, 2023.
"iOS mobile app repository". github.com/ProtonMail/ios-mail. Proton AG. Archived from the original on November 1, 2019. Retrieved May 25, 2024.
"Android mobile app repository". github.com/ProtonMail/android-mail. Proton AG. Archived from the original on May 26, 2024. Retrieved May 25, 2024.
"Proton bridge repository". github.com/ProtonMail/proton-bridge. Proton AG. Archived from the original on April 17, 2020. Retrieved May 25, 2024.
"LICENSE". github.com/ProtonMail/WebClient. Proton AG. December 25, 2021. Archived from the original on December 25, 2021. Retrieved May 25, 2024.
"Why Proton Mail is in Switzerland". Proton. May 19, 2014. Archived from the original on July 6, 2022. Retrieved May 28, 2022.
"ProtonMail, the Easy-to-Use Encrypted Email Service, Opens Up to the Public". March 17, 2016. Archived from the original on July 2, 2016. Retrieved March 18, 2016.
"Fighting Censorship with Proton Mail Encrypted Email Over Tor". Proton Mail Blog. January 19, 2017. Archived from the original on May 28, 2022. Retrieved January 20, 2017.
Edelman, Gilad (May 25, 2022). "Proton Is Trying to Become Google—Without Your Data". Wired. ISSN 1059-1028. Archived from the original on September 30, 2023. Retrieved May 27, 2022.
Proton Mail [@Protonmail] (September 25, 2020). "@TheEvanCarroll That is correct. We don't have a stand-alone back-end that can be installed for small deployment, because our backend software is optimized for large deployments with millions of users and distributed infrastructure" (Tweet). Archived from the original on July 10, 2021. Retrieved September 11, 2021 – via Twitter.
"Proton Mail responds on Reddit". April 2, 2019. Archived from the original on November 14, 2020. Retrieved September 24, 2020. We don't plan to open source the back-end code, because it doesn't add trust (users can't verify what code is running on the backend) and doing so would given away information about how we do anti-spam and anti-abuse.
"Proton Mail goes Open Source with version 2.0". Proton Mail Blog. August 13, 2015. Archived from the original on May 28, 2022. Retrieved January 31, 2016.
"Proton Mail iOS app is open source". Proton Mail Blog. October 30, 2019. Archived from the original on May 28, 2022. Retrieved December 12, 2019.
"The Proton Mail Android app is open source". Proton Mail Blog. April 23, 2020. Archived from the original on May 28, 2022. Retrieved April 24, 2020.
"Proton Mail Bridge is open source on macOS, Windows, and Linux". Proton Mail Blog. April 15, 2020. Archived from the original on May 28, 2022. Retrieved April 24, 2020.
"Proton Mail Unveils an Overdue Makeover and New Features". Gizmodo. June 8, 2021. Archived from the original on April 7, 2022. Retrieved July 6, 2021.
"Über-Secure ProtonMail Beta Maxes Out Servers in Just 60 Hours". Infosecurity Magazine. May 22, 2014. Archived from the original on November 7, 2018. Retrieved October 19, 2015.
"Proton Mail raises a record $500,000 through crowdfunding to disrupt the state of email communications". Proton. July 29, 2014. Archived from the original on December 3, 2023. Retrieved May 13, 2024. Proton Mail's crowdfunding campaign has surged past $500,000 with the support of over 10,000 backers
Halfacree, Gareth (July 1, 2014). "ProtonMail hit by PayPal account freeze". bit-tech. Archived from the original on November 20, 2018. Retrieved October 19, 2015.
Howell O'Neill, Patrick (July 1, 2014). "PayPal freezes account of email encryption startup Proton Mail [Update]". The Daily Dot. Archived from the original on June 18, 2019. Retrieved October 19, 2015.
Yen, Andy (June 30, 2014). "Paypal Freezes Proton Mail Campaign Funds". Proton Mail Blog. Archived from the original on May 28, 2022. Retrieved October 19, 2015.
"Announcement: Proton Mail has launched worldwide!". Proton Mail Blog. March 17, 2016. Archived from the original on May 28, 2022. Retrieved July 21, 2016.
Martin, Alexander J. (January 19, 2017). "Proton Mail launches Tor hidden service to dodge totalitarian censorship". The Register. Archived from the original on January 20, 2017.
"Introducing Proton Mail Contacts – the world's first encrypted contacts manager". Proton Mail Blog. November 21, 2017. Archived from the original on May 28, 2022. Retrieved May 28, 2022.
M., Irina (December 6, 2017). "Introducing Proton Mail Bridge, email encryption for Outlook, Thunderbird, and Apple Mail". Proton Mail Blog. Archived from the original on May 28, 2022. Retrieved December 16, 2017.
"Introducing Address Verification and Full PGP Support - Proton Mail Blog". Proton Mail Blog. July 25, 2018. Archived from the original on May 28, 2022. Retrieved September 28, 2018.
"Securitum Security Report" (PDF). Proton mail blog. Archived from the original (PDF) on July 5, 2021.
"SimpleLogin joins the Proton family". SimpleLogin. April 8, 2022. Archived from the original on December 5, 2023. Retrieved December 14, 2023.
Yen, Andy (November 7, 2022). "Proton and SimpleLogin are joining forces". Proton. Archived from the original on June 17, 2023. Retrieved December 14, 2023. We have been following SimpleLogin closely for a long time as many Proton Mail users utilize it to prevent their Proton Mail addresses from being leaked to spammers
"Introducing the Proton Mail desktop app". Proton. March 14, 2024. Archived from the original on April 1, 2024. Retrieved April 1, 2024.
Khalid, Amrita (December 14, 2023). "Proton Mail finally gets a desktop app for encrypted email and calendar". The Verge. Archived from the original on April 1, 2024. Retrieved April 1, 2024.
Sneddon, Joey (March 14, 2024). "Proton Mail's New Desktop App is Available for Linux". OMG! Ubuntu. Archived from the original on April 1, 2024. Retrieved April 1, 2024.
Sawers, Paul (March 14, 2024). "Proton Mail desktop app officially launches, but remains for premium subscribers only". TechCrunch. Archived from the original on April 1, 2024. Retrieved April 1, 2024.
Jawad, Usama (March 14, 2024). "Proton Mail's desktop app is now generally available for Windows and Mac". XDA Developers. Archived from the original on March 17, 2024. Retrieved April 1, 2024.
Stockman, Jason (May 22, 2014). "How are Proton Mail keys distributed?". Stack Exchange. Archived from the original on November 15, 2018. Retrieved October 19, 2015.
Khandelwal, Swati (May 26, 2014). "Proton Mail: 'NSA-Proof' End-to-End Encrypted Email Service". The Hacker News. Archived from the original on November 7, 2018. Retrieved October 19, 2015.
Yen, Andy (September 22, 2015). "Proton Mail adds Facebook PGP integration". Proton Mail Blog. Archived from the original on May 28, 2022. Retrieved October 19, 2015.
"Proton Mail Security Details". Proton Mail Security. January 31, 2016. Archived from the original on October 11, 2023. Retrieved January 31, 2016.
Graw, Michael (October 5, 2022). "ProtonMail review". IT Pro. Archived from the original on August 12, 2023. Retrieved August 12, 2023.
Rubenking, Neil J. (August 18, 2023). "Proton Mail Review". PCMag. Archived from the original on August 24, 2023. Retrieved March 24, 2025.
Athow, Desire (June 16, 2023). "Proton Mail review". TechRadar. Archived from the original on August 12, 2023. Retrieved August 12, 2023.
"Proton Privacy Policy". proton.me. May 25, 2022. Archived from the original on September 5, 2021. Retrieved September 10, 2021.
"Transparency Report". proton.me. September 10, 2021. Archived from the original on August 25, 2022. Retrieved September 10, 2021.
Silva, Gioia da (August 3, 2021). ""Wenn du noch einmal das Wort Impfpflicht in den Mund nimmst, schlage ich dir und deiner Frau die Zähne aus": Der Schweizer Service ProtonMail wird immer wieder für Drohungen missbraucht" ["If you say the word compulsory vaccination again, I'll knock your and your wife's teeth out": The Swiss service Proton Mail is repeatedly misused for threats]. Neue Zürcher Zeitung (in Swiss High German). Archived from the original on May 13, 2024. Retrieved September 10, 2021.
"Important clarifications regarding arrest of climate activist". proton.me. September 6, 2021. Archived from the original on May 28, 2022. Retrieved September 10, 2021.
"Proton Mail provided user data that led to an arrest in Spain". TechSpot. May 14, 2024. Archived from the original on May 14, 2024. Retrieved May 14, 2024.
Shields, Michael (October 22, 2021). "Secure email group Proton wins Swiss appeal over surveillance rules". Reuters. Archived from the original on October 17, 2023. Retrieved May 26, 2022.
"Is Proton Mail blocked in Belarus?". Proton Mail Blog. November 15, 2019. Archived from the original on November 17, 2019. Retrieved September 14, 2022.
Tsydenova, Nadezhda; Ivanova, Polina (January 29, 2020). Heinrich, Mark (ed.). "Russia blocks encrypted email service Proton Mail". Reuters. Archived from the original on January 30, 2020. Retrieved January 30, 2020.
"Почтовый сервис Proton Mail заблокировали в России из-за сообщений о минированиях". www.kommersant.ru (in Russian). January 29, 2020. Archived from the original on January 29, 2020. Retrieved January 29, 2020.
"Russia Blocks Encrypted Swiss Email Service Proton Mail". The Moscow Times. Reuters. January 29, 2020. Archived from the original on January 29, 2020. Retrieved January 29, 2020.
"Proton Mail не получала просьб о помощи в поисках лжеминеров". Interfax.ru (in Russian). January 29, 2020. Archived from the original on January 29, 2020. Retrieved January 29, 2020.
"Россия не обращалась за информацией о "минерах", заявили в Proton Mail". РИА Новости (in Russian). January 29, 2020. Archived from the original on January 29, 2020. Retrieved January 29, 2020.
"We are rolling out technologies which will help us better overcome attempts to block Proton Mail". Reddit. March 13, 2020. Archived from the original on November 14, 2020. Retrieved March 14, 2020.

wired.com

Edelman, Gilad (May 25, 2022). "Proton Is Trying to Become Google—Without Your Data". Wired. ISSN 1059-1028. Archived from the original on September 30, 2023. Retrieved May 27, 2022.

worldcat.org

search.worldcat.org

Edelman, Gilad (May 25, 2022). "Proton Is Trying to Become Google—Without Your Data". Wired. ISSN 1059-1028. Archived from the original on September 30, 2023. Retrieved May 27, 2022.

x.com

Proton Mail [@Protonmail] (September 25, 2020). "@TheEvanCarroll That is correct. We don't have a stand-alone back-end that can be installed for small deployment, because our backend software is optimized for large deployments with millions of users and distributed infrastructure" (Tweet). Archived from the original on July 10, 2021. Retrieved September 11, 2021 – via Twitter.
Proton (January 29, 2020). "For now, we recommend using the TOR network (via the TOR Browser) to access our services". X.

xda-developers.com

Jawad, Usama (March 14, 2024). "Proton Mail's desktop app is now generally available for Windows and Mac". XDA Developers. Archived from the original on March 17, 2024. Retrieved April 1, 2024.