JavaScript frameworks
3 detectedAstro
First seen Jul 17, 2026Last seen Jul 17, 2026
100%
confidence
Classnames
First seen Jul 17, 2026Last seen Jul 17, 2026
100%
confidence
Headless UI
First seen Jul 17, 2026Last seen Jul 17, 2026
100%
confidence
Public technology profileAging scan
protonmail.com
Our latest scan of protonmail.com detected 8 technologies across 5 categories. The strongest signals include Algolia, Astro, Classnames.
8
Technologies
5
Categories
99%
Avg. confidence
42d ago
Last scanned
Current snapshot
Detected technology stack
Grouped by category · confidence is detection certainty
Other
2 detectedPayments
1 detectedPayPal
First seen Jul 17, 2026Last seen Jul 17, 2026
100%
confidence
Frontend
1 detectedTailwind CSS
First seen Jul 17, 2026Last seen Jul 17, 2026
100%
confidence
Security
1 detectedLetsEncrypt
First seen Jul 17, 2026Last seen Jul 17, 2026
95%
confidence
Publisher intelligence
Advertising ecosystem
Declared direct and reseller relationships from ads.txt and app-ads.txt. These are publisher declarations, not runtime detections.
Declaration files
0/2
ads.txt and app-ads.txt
Direct relationships
0
Reseller relationships
0
Declared systems
0
Counted per declaration file
ads.txt
Not presentHTTP 404
- Direct
- 0
- Reseller
- 0
- Systems
- 0
app-ads.txt
Not presentHTTP 404
- Direct
- 0
- Reseller
- 0
- Systems
- 0
Infrastructure
Network and security
DNS, hosting, TLS and email-security evidence observed during the latest scan. Incomplete lookups remain explicitly unknown.
Transport and email security
HTTPSObserved
HSTSObserved on scanned response
SPFLookup incomplete
DMARCLookup incomplete
Network footprint
Site signals
Content and capabilities
Structured data, languages, social platforms and page capabilities observed across the scanned pages.
Languages
en
Structured data
AggregateRatingAnswerCorporationDownloadActionEntryPointFAQPageOfferPersonPostalAddressQuestionRegisterActionSoftwareApplicationUseActionWebPageWebSite
Social platforms
facebookinstagramlinkedinxyoutube
Currencies
CHFUSD
Observed capabilities
Responsive viewportApple touch iconPricing pageDocumentationContact pageCareers pageBlog
Recent technology changes
Observed changes between stored scans, not vendor-confirmed installation dates.