37signals.com
37signals
Last scanned Jul 25, 2026, 10:25 PM · 2 views
Overall score
Great
Summary
A catalog of ideas — signals — that drive us. This website is hosted on Cloudflare. SEO is excellent (90/100) and accessibility is excellent (100/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: robots.txt not found.
37signals
A catalog of ideas — signals — that drive us.
- United States
- Hosted on Cloudflare
Top issues to fix
7 issues found · 2 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEOPublish an XML sitemap and reference it from robots.txt to speed up page discovery.
+1 more issue — details in the sections below.
SEO
2 issue(s) found
Performance
579 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
37signals
A catalog of ideas — signals — that drive us.
Contact
Email, phone, and address published on this site's own pages.
Source: https://37signals.com/contact
Meta tags
- Title
- 37signals
- Description
- A catalog of ideas — signals — that drive us.
- Canonical
- https://37signals.com/
- Language
- en
- Charset
- utf-8
- Viewport
- initial-scale=1, width=device-width
- Robots meta
- index, follow
- Manifest
Technologies
Detected frameworks, languages, and tools.
No technologies detected.
Hosting & CDN
- Hosting provider
- Cloudflare
- CDN provider
- Cloudflare
- IP address
- 104.18.1.135
- ASN
- AS13335 (CLOUDFLARENET - Cloudflare, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX |
|
| TXT | — |
| NS |
|
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Google Trust Services
- Subject
- 37signals.com
- Valid from
- Jul 20, 2026
- Valid to
- Oct 18, 2026
- Days until expiry
- 84
- SAN domains
- 37signals.com, *.37signals.com
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 0 · H3 0
Links
44 internal · 8 external · 1 broken
Images
2 total · 0 missing alt
Scripts / Styles
3 scripts · 22 stylesheets
JS / CSS size
760 B · 2.7 KB
Page size
16.7 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- robots.txt not found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Careers
This company has an active careers page, but individual openings weren't reliably parsed from it — visit the page above for current listings.
Scan details
- Requested URL
- https://37signals.com
- Final URL
- https://37signals.com
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 579 ms
- HTML size
- 16.7 KB
- Redirect chain
- https://37signals.com
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does 37signals.com use?
- We did not detect any specific technologies for 37signals.com in the latest scan.
- Is 37signals.com secure (HTTPS)?
- Yes. 37signals.com uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Oct 18, 2026.
- Who hosts 37signals.com?
- 37signals.com is hosted on Cloudflare, behind Cloudflare CDN.
- What is 37signals.com's SEO score?
- 37signals.com scored 90/100 for SEO in the latest analysis (excellent).
- What is 37signals.com's overall website score?
- 37signals.com has an overall SiteGraph score of 88/100, combining SEO, performance, security, and accessibility.
- What company operates 37signals.com?
- 37signals.com is operated by 37signals. A catalog of ideas — signals — that drive us.
- Is 37signals.com hiring?
- 37signals.com has a careers page; check it directly for current openings.
OpenGraph & Twitter Card
OpenGraph
Twitter Card