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signal.org

https://signal.org· First analyzed 13 Feb 2026· Updated 13 Feb 2026
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signal.org
Desktop screenshot of signal.org
Mobile screenshot of signal.org
Mobile

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Hosting Provider

cloudflare.com

IP Address

104.18.10.47

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

casey.ns.cloudflare.com.zita.ns.cloudflare.com.

Performance

Page Speed

1017 KB
20 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Cloudflare
CDN
Cloudflare

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

5 Technologies Detected

CSS Frameworks

2

Libraries

1

Other

1

SEO Analysis

D52/100
7
3
2
S
signal.orgsignal.org

Signal >> Home

No description available for this page.

Title Length14 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

  • Missing meta description - important for click-through rates
  • Many images missing alt text (10/10)

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Sponsored

B

Security Score

78%Good
Static / Informational

HTTPS

WAF

57d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

11.01.2026

Valid Until

11.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

signal.org

SHA-256 Fingerprint

AD:8E:F3:DB:6B:93:13:3F:C4:B4:54:20:FD:E9:57:BE:2E:D5:80:EB...

Recommendations

Security recommendation preview

HTTP Headers

Developer Console

access-control-allow-origin
*
alt-svc
h3=":443"; ma=86400
cache-control
🟡 0s(public, max-age=0, must-revalidate)
cf-cache-status
DYNAMIC
cf-ray🇩🇪 Frankfurt
9cd0fdba89871d0c-FRA
content-encoding
📦 Gzip(gzip)
Good Warning Issue

Email Infrastructure

Google Workspace

Score

93

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (5)

alt2.aspmx.l.google.com
alt1.aspmx.l.google.com
aspmx3.googlemail.com
aspmx.l.google.com

+1 more

Domain Information

signal.org

Domain Age
24y 10m

Created

15.04.2001

Expires

15.04.2028

Last Updated

08.06.2025

Registrar

MarkMonitor Inc.

DNSSEC
Not Enabled

Typography & Readability

Inter

68/100
Readability
/30
25/40

24px · LH 1.00

Hierarchy
/20
25/25

2.5x ratio

WCAG
/25
15/15

Contrast: undefined

Performance
/25
13/20

1 font

Heading Font

Inter

Sans60px

Body Font

Inter

Sans24px

Contrast Ratio

--

Reading Comfort

~37 CPL

Needs attention
60px
h1
40px
h2
28px
h3
24px
p

✅ Excellent readability: 24px body text is ideal for all devices.

⚠️ Tight line spacing (1.00). Consider 1.4-1.6 for better readability.

✅ Strong hierarchy: Headlines are 2.5x larger than body text.

✅ Good performance: Using 1 font families keeps load times fast.

✅ Consistent design: Single font family with weight variations is a modern best practice.

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

4 Resources

2
Scripts
2
Styles
0
Async
0
Defer

Top Script Sources

local(2)

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Last analyzed: 13 Feb 2026 at 02:45

Historical Analysis & Change Tracking