Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 104.18.15.197 |
| Server Software | cloudflare |
| CDN | Cloudflare |
| Compression | gzip |
|
ℹ 🔵 Missing HSTS | HTTP Strict Transport Security is not configured. Recommended for HTTPS sites. |
|
ℹ 🔵 Missing Content Security Policy | CSP is not configured. It helps prevent XSS attacks and content injection. |
|
ℹ 🔵 Missing X-Frame-Options | The site can be embedded in iframes by third parties (clickjacking risk). |
HTTP Status Code 200
HTTP Version HTTP/1.1
HTTPS ✔ Available
IP Address 104.18.15.197
Server Software cloudflare
CDN Cloudflare
Compression gzip
ℹ 🔵 Missing HSTS HTTP Strict Transport Security is not configured. Recommended for HTTPS sites.
ℹ 🔵 Missing Content Security Policy CSP is not configured. It helps prevent XSS attacks and content injection.
ℹ 🔵 Missing X-Frame-Options The site can be embedded in iframes by third parties (clickjacking risk).
Redirect Chain
| # | URL | HTTP Status Code | Status |
| 1 | https://whispersystems.org:443 | 301 | HTTP/2 301 |
| 2 | https://signal.org/ | 200 | HTTP/2 200 |
#1 URL https://whispersystems.org:443
HTTP Status Code 301
Status HTTP/2 301
#2 URL https://signal.org/
HTTP Status Code 200
Status HTTP/2 200
Performance
| DNS Lookup | 5.2 ms |
| TCP Connect | 6.9 ms |
| TLS Handshake | 7.8 ms |
| Time To First Byte (TTFB) | 68.5 ms |
| Content Download | 0.3 ms |
| Total Response Time | 68.8 ms |
DNS Lookup 5.2 ms
TCP Connect 6.9 ms
TLS Handshake 7.8 ms
Time To First Byte (TTFB) 68.5 ms
Content Download 0.3 ms
Total Response Time 68.8 ms
Security
| HTTPS | ✔ Enabled |
| HSTS | ✘ Not configured |
| CSP | ⚠ Not configured |
| X-Frame-Options | ⚠ Not configured |
| X-Content-Type-Options | ✔ nosniff |
| Referrer Policy | strict-origin-when-cross-origin |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Enabled
HSTS ✘ Not configured
CSP ⚠ Not configured
X-Frame-Options ⚠ Not configured
X-Content-Type-Options ✔ nosniff
Referrer Policy strict-origin-when-cross-origin
HTTP/2 ⚠ HTTP/1.1
SEO Quick Check
| Title | Signal >> Home |
| Open Graph Title | Signal Messenger: Speak Freely |
| Open Graph Description | Say "hello" to a different messaging experience. An unexpected focus on privacy, combined with all of the features you expect. |
| Open Graph Image | https://signal.org/assets/images/og/og-image.png |
| Twitter Card | app |
Title Signal >> Home Open Graph Title Signal Messenger: Speak Freely Open Graph Description Say "hello" to a different messaging experience. An unexpected focus on privacy, combined with all of the features you expect. Open Graph Image https://signal.org/assets/images/og/og-image.png Twitter Card app Detected Technologies
| Technology | Google Analytics Cloudflare Node.js |
Technology Google Analytics Cloudflare Node.js
HTTP Headers
| Date
| Tue, 28 Jul 2026 19:54:33 GMT |
| Content-type
| text/html; charset=utf-8 |
| X-content-type-options
| nosniff |
| Report-to
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| Nel
| {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800} |
| Access-control-allow-origin
| * |
| Cache-control
| public, max-age=0, must-revalidate |
| Referrer-policy
| strict-origin-when-cross-origin |
| Vary
| accept-encoding |
| Server
| cloudflare |
| Cf-cache-status
| DYNAMIC |
| Content-encoding
| gzip |
| Cf-ray
| a2266fb57b0b02af-CDG |
| Alt-svc
| h3=":443"; ma=86400 |
Meta Tags
| X-UA-Compatible | IE=edge |
| Viewport | width=device-width, initial-scale=1 |
| Apple-itunes-app | app-id=874139669 |
| Msapplication-TileColor | #e3e8fe |
| Msapplication-config | /assets/images/favicon/browserconfig.xml |
| Theme-color | #e3e8fe |
Date Tue, 28 Jul 2026 19:54:33 GMT
Content-type text/html; charset=utf-8
X-content-type-options nosniff
Report-to {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=CjRSSRFa6kaDSCOfHAmjMx%2FfMPf1XgLge4D3Svd7sJVnKRHnf3rtpwEoG%2FmgNizqUP7xeMQVrGdXvczQe4Jt4waAEM5zgpJf3Q3qM2EznCJQ4I8uYgGlFzgvxdV6k0Nq4gplJDSgm2mt"}]}
Nel {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}
Access-control-allow-origin *
Cache-control public, max-age=0, must-revalidate
Referrer-policy strict-origin-when-cross-origin
Vary accept-encoding
Server cloudflare
Cf-cache-status DYNAMIC
Content-encoding gzip
Cf-ray a2266fb57b0b02af-CDG
Alt-svc h3=":443"; ma=86400
