What protonvpn.com is built with
Read on 2026-10-28 15:02. 11 technologies spotted.
| Technology | Category | Version | Confidence | Tell |
|---|---|---|---|---|
| Astro | Static site generator, JavaScript frameworks | 100% | dom link[href*='/_astro/'] @href: /_astro/ErrorPageContent.C8TsH2qV.css | |
| Cloudflare | CDN | 100% | dns NS: mitch.ns.cloudflare.com | |
| Cloudflare DNS | Hosting | 100% | dns NS: mitch.ns.cloudflare.com | |
| HSTS | Security | 100% | headers strict-transport-security: max-age=31536000; includeSubDomains; prel | |
| Headless UI | UI frameworks | 100% | dom button @id: headlessui-tabs-tab-_r167R_dm_ | |
| Let's Encrypt | SSL/TLS certificate authorities | 100% | certIssuer: Let's Encrypt, YR2 | |
| Open Graph | Miscellaneous | 100% | dom meta[property*='og:']: <meta property="og:title" content="The best VPN for speed and security"> | |
| PWA | Miscellaneous | 100% | dom link[rel='manifest']: <link rel="manifest" href="/site.webmanifest"> | |
| Priority Hints | Performance | 100% | dom iframe[fetchpriority], img[fetchpriority], script[fetchpriority], link[fetchpriority]: <img fetchPriority="high" srcSet="https://vpncdn.protonweb.com/image-transformation/?s=a&image=vpn_devices_UI_mobile | |
| Proton Mail | Webmail | 100% | dns MX: mail.protonmail.ch | |
| Tailwind CSS | UI frameworks | 100% | css: .dtc-border-gray-50{--tw-border-opacity:1;border-color:rgb(249 250 251/var(--tw |
Look up any site with GET /v1/lookup?domain=protonvpn.com. Start free.