37signals.com
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Hosting Provider
cloudflare.comIP Address
104.18.1.135
Server Location
🇨🇦 Toronto, Canada
ASN
AS13335
Organization
Cloudflare, Inc.
Server
Cloudflare
CDN
Cloudflare
WAF
Cloudflare
Nameservers
Performance
Page Speed
Architecture Stack
SEO Analysis
37signals
A catalog of ideas — signals — that drive us.
Recommended: 50-60 chars
Recommended: 120-160 chars
Issues (1)
- • Missing H1 tag - every page should have one H1
3 issues found
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Security Score
HTTPS
WAF
66d
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
Valid From
24.01.2026
Valid Until
24.04.2026
OCSP Stapling
Enabled
Subject Alternative Names (2)
SHA-256 Fingerprint
8A:4E:4A:1A:28:DC:D0:F0:F6:DA:8C:92:16:EE:25:F3:87:0F:ED:F1...
Recommendations
Security recommendation preview
HTTP Headers
Developer Console
Email Infrastructure
Custom Mail Server
Score
73
DMARC Policy
Quarantine (Moderate)
MX Records (1)
Domain Information
37signals.com
Created
13.06.1999
Expires
13.06.2027
Last Updated
21.02.2024
Registrar
Cloudflare, Inc.
Typography & Readability
Lab Grotesque
39px · LH 1.30
1x ratio
Contrast: undefined
1 font
Heading Font
Lab Grotesque
Body Font
Lab Grotesque
Contrast Ratio
--
Reading Comfort
Single Font Family
left aligned✅ Excellent readability: 39px body text is ideal for all devices.
⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.
✅ Good performance: Using 1 font families keeps load times fast.
✅ Consistent design: Single font family with weight variations is a modern best practice.
✅ Protected text on images: Using gradient for readability.
✅ Clean layout: Consistent left alignment throughout.
Business & Marketing Stack
1 Tools Detected
1
Categories
1
Total Tools
0
Enterprise
0
Mid-Market
Assessment: Growing marketing technology adoption
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Scripts & Styles
12 Resources
Top Script Sources
Website Identity
37signals.com
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Historical Analysis & Change Tracking