What powers protonmail.com?

Last seen Mar 2023 · 46 technologies across 21 categories

Analytics

Matomo Analytics
since Jun 2018

CDN

Cloudflare
since May 2019
Google Hosted Libraries
since Feb 2022
Unpkg
since Jul 2021

CMS

Prismic
since Jun 2022

Ecommerce

Cart Functionality
since Aug 2020
Shopify
since Aug 2018

Font scripts

Font Awesome
since Jun 2018
Google Font API
since Sep 2019

Issue trackers

Sentry
since Oct 2020

JavaScript frameworks

Handlebars v1.3.0
since Sep 2019
React
since Jun 2021

JavaScript libraries

Boomerang
since Jul 2021
core-js v3.27.2
since Sep 2021
Flickity
since Sep 2019
jQuery v1.12.4
since Jun 2018
LazySizes
since Feb 2022
List.js
since Feb 2020
Loadable-Components
since Jun 2022
Lodash v4.17.21
since Jul 2021
Modernizr v2.8.3
since Jun 2018

Miscellaneous

Open Graph
since Sep 2022
PWA
since Aug 2022
RSS
since Dec 2022
Webpack
since Jan 2019

Payment processors

American Express
since Aug 2020
Apple Pay
since Aug 2020
Bitcoin
since Sep 2021
Mastercard
since Nov 2021
PayPal
since Nov 2021
Visa
since Aug 2020

Programming languages

Ruby
since Feb 2020

Recruitment & staffing

Recruitee
since Apr 2022

Security

HSTS
since Sep 2022

Shopify apps

Fast Bundle
since Jul 2022
Secomapp
since Apr 2022
Shopify Product Reviews
since Sep 2021

Static site generator

Gatsby
since Jun 2022

Translation

Transcy
since May 2022

UI frameworks

Bootstrap v3.3.6
since Jun 2018
Headless UI
since Jul 2022
Tailwind CSS
since Apr 2022

Video players

YouTube
since Aug 2021

Web frameworks

Ruby on Rails
since Feb 2020

Web Servers

Apache HTTP Server
since Jun 2018

Webmail

Proton Mail
since Jan 2023

AI Crawlers

Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Sep 2026.

  • robots.txt found
  • llms.txt not found
  • ai.txt not found
  • Sep 2026 *: Restricted (was Allowed)
  • Aug 2026 *: Allowed (was Restricted)
  • Aug 2026 *: Restricted (was Allowed)

See who blocks each AI crawler across the web

AI Crawlers

No AI crawlers blocked

Full breakdown

Open Page Rank

7.73 / 10 · ranked #12,336 of all domains

2,143 referring domains · OpenPageRank

Infrastructure

  • Registered Aug 2010 (16 years) via MarkMonitor Inc., renews Aug 2028
  • Hosted on PROTON (185.70.42.12)
  • DNS: protonmail.com
  • Email: Proton Mail
  • Email security: SPF (soft fail), DMARC quarantine, DNSSEC signed, CAA
  • SSL: Let's Encrypt, RSA 4096, wildcard, expires Dec 2026
  • Common Crawl link graph: rank 9,403, 17 hosts
  • Verified with: Brave Creators, Google, Mail.ru, Yandex Webmaster

DNS records as swept Sep 2026, certificate as seen Sep 2026, registration from the registry's RDAP service. How the web is hosted

Subdomains

HostTechs
shop.protonmail.com 25
protonmail.com 14
careers.protonmail.com 9
account.protonmail.com 7
mail.protonmail.com 7
drive.protonmail.com 6
old.protonmail.com 6
www.protonmail.com 6
beta.protonmail.com 3
calendar.protonmail.com 3

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