cncf.io
Cloud Native Computing Foundation
Last scanned Aug 2, 2026, 7:00 AM · 16 views
Overall score
Excellent
Summary
CNCF is the vendor-neutral hub of cloud native computing, dedicated to making cloud native ubiquitous. This website uses WordPress behind Fastly CDN. SEO is excellent (90/100) and accessibility is excellent (100/100). Security scores excellent (95/100) and performance excellent (100/100). Top issue: robots.txt not found.
CNCF is the vendor-neutral hub of cloud native computing, dedicated to making cloud native ubiquitous.
Top issues to fix
4 issues found
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
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.
20 broken links on the page
SEOFix or remove broken links — they waste crawl budget and erode user trust.
SEO
2 issue(s) found
Performance
702 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Score history
-1 overall since Jul 26, 2026
- Overall
- 96
- SEO
- 90
- Security
- 95
- Performance
- 100
- Accessibility
- 100
Organization
Company details published in this site's own structured data.
Meta tags
- Title
- Cloud Native Computing Foundation
- Description
- CNCF is the vendor-neutral hub of cloud native computing, dedicated to making cloud native ubiquitous.
- Canonical
- https://www.cncf.io/
- Language
- en-US
- Charset
- UTF-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- max-snippet:-1,max-image-preview:standard,max-video-preview:-1
- Manifest
- https://www.cncf.io/wp-content/themes/cncf-twenty-two/images/manifest.webmanifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- Fastly
- IP address
- —
- ASN
- —
DNS records
| Type | Value |
|---|---|
| A | — |
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- cncf.io
- Valid from
- Jul 30, 2026
- Valid to
- Oct 28, 2026
- Days until expiry
- 86
- SAN domains
- cncf.io, www.cncf.io
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyEnabled
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 7 · H3 8
Links
142 internal · 31 external · 20 broken
Images
108 total · 0 missing alt
Scripts / Styles
25 scripts · 2 stylesheets
JS / CSS size
35.3 KB · 27.3 KB
Page size
202 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.
Scan details
- Requested URL
- https://cncf.io
- Final URL
- https://www.cncf.io/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 698 ms
- HTML size
- 202 KB
- Redirect chain
- https://cncf.io → https://www.cncf.io/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does cncf.io use?
- cncf.io is built with WordPress, jQuery, Nginx.
- Is cncf.io secure (HTTPS)?
- Yes. cncf.io uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 28, 2026.
- Who hosts cncf.io?
- Hosting provider information for cncf.io is not available yet.
- What is cncf.io's SEO score?
- cncf.io scored 90/100 for SEO in the latest analysis (excellent).
- What is cncf.io's overall website score?
- cncf.io has an overall SiteGraph score of 96/100, combining SEO, performance, security, and accessibility.
- Has cncf.io's score changed over time?
- cncf.io's overall score has declined by 1 point (from 97 to 96) since Jul 26, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card