knock.app Tech Stack
Live first-party scan of knock.app's tech stack. 5 technologies detected across 5 categories, via Wappalyzer fingerprinting + DNS CNAME + TLS certificate inspection. Last change: Sep 6, 2026 - knock.app added C3.js. Scan timestamp: Oct 4, 2026.
Infrastructure Layer
Google Cloud
CDN
Cloudflare
Cloud hosting
Google Cloud
JavaScript libraries
C3.js
PaaS
Vercel
Security
HSTS
Tech Stack Changes
Compare knock.app's Stack
How was this detected?
For knock.app, DetectZeStack identified 5 technologies: 4 via HTTP fingerprinting and 1 via TLS handshake.
Detection runs four independent layers in parallel: HTTP response headers, TLS handshake metadata, certificate issuer inspection, and DNS record lookups. The breakdown above shows which layers fired for this specific domain — some sites carry most of their fingerprint in HTTP, others rely heavily on infrastructure (DNS/TLS).
How knock.app compares
Symmetric diff between knock.app and similar sites detected on DetectZeStack.
vs www.udacity.com — 3 shared, 2 unique here, 4 unique there
Only on knock.app: Vercel, Google Cloud
Only on www.udacity.com: Cloudflare Bot Management, Let's Encrypt, OneTrust, Amazon Web Services
vs www.chegg.com — 2 shared, 3 unique here, 4 unique there
Only on knock.app: Cloudflare, Google Cloud, Vercel
Only on www.chegg.com: Amazon CloudFront, Amazon Web Services, Google Tag Manager, Amplitude
vs www.mlb.com — 2 shared, 3 unique here, 3 unique there
Only on knock.app: Vercel, Cloudflare, Google Cloud
Only on www.mlb.com: DigiCert, Fastly, Varnish
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Get Free API Key Chrome ExtensionWhat technologies does knock.app use?
knock.app uses 5 technologies across 5 categories. The full breakdown is listed above, organized by function. Each technology was identified through analysis of HTTP headers, DNS records, TLS certificates, and HTML content.
What CDN does knock.app use?
knock.app uses Cloudflare for content delivery. CDN providers are identified through DNS CNAME records and HTTP response headers.
How is knock.app's tech stack detected?
DetectZeStack identifies technologies on knock.app through multiple detection methods: HTTP response header analysis, HTML and JavaScript content scanning, DNS record lookups, and TLS certificate inspection. This multi-layered approach catches technologies that single-method tools miss.