What powers proton.co.jp?
Last seen Aug 2026 · 6 technologies across 6 categories
Analytics
Google Analytics
since Jul 2021
Hosting
Sakura Internet
since Aug 2022
JavaScript libraries
Miscellaneous
SWFObject
since Jul 2021
Tag managers
Google Tag Manager
since Oct 2022
Web servers
Nginx
since Jul 2021
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Sep 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.97 / 10 · ranked #593,209 of all domains
38 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.8 s |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese
- Weight: 1.9 MB · 60 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on Sakura Internet (49.212.198.94)
- Email: proton.co.jp
- Email security: no SPF record, no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 656,156, 3 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted