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cncf.io

https://cncf.io· First analyzed 17 Feb 2026· Updated 17 Feb 2026
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cncf.io

Sponsored

Hosting Provider

Pantheon
pantheon.io

IP Address

23.185.0.3

Server Location

🇺🇸 San Francisco, United States

ASN

AS54113

Organization

Pantheon

Server

Nginx

CDN

Fastly

Nameservers

ns2.dnsimple-edge.net.ns3.dnsimple.com.ns4.dnsimple-edge.org.ns1.dnsimple.com.

Performance

Page Speed

3.5 MB
117 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
WordPress
cms
CNCF Twenty Two Themev2.0.0
by James Hunt, Chris Abraham
View Theme

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

8 Technologies Detected

Libraries

1
jQueryv3.7.1

UI Components

1
Slick Carousel

CSS Frameworks

1
Tailwind CSS

Analytics

1
Google Analytics

Tag Managers

1
Google Tag Manager

Marketing

1
HubSpot

Web Servers

1
Nginx

Plugins

1
Flying Pages

SEO Analysis

A+94/100
13
1
0
C
cncf.iocncf.io

Cloud Native Computing Foundation

CNCF is the vendor-neutral hub of cloud native computing, dedicated to making cloud native ubiquitous.

Title Length33 chars

Recommended: 50-60 chars

Description Length102 chars

Recommended: 120-160 chars

Issues (0)

    1 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    3,101 URLs

    robots.txt

    4 rules

    Sitemap reference found

    Sponsored

    Sponsored

    C

    Security Score

    66%Fair
    Interactive

    HTTPS

    No WAF

    72d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Let's Encrypt

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    31.01.2026

    Valid Until

    01.05.2026

    Subject Alternative Names (2)

    cncf.iowww.cncf.io

    SHA-256 Fingerprint

    E2:68:C8:4F:21:4C:2A:D7:71:AE:E6:02:CD:B3:F7:2F:2C:CF:EA:B0...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    accept-ranges
    bytes
    age
    855
    cache-control
    🟡 60s(public, max-age=60, s-maxage=43200, stale-while-revalidate=8...)
    content-encoding
    📦 Gzip(gzip)
    content-length
    55328
    content-security-policy
    frame-ancestors 'self';
    Good Warning Issue

    Email Infrastructure

    Google Workspace

    Score

    93

    SPF
    DKIM
    DMARC

    DMARC Policy

    Quarantine (Moderate)

    MX Records (5)

    alt3.aspmx.l.google.com
    alt4.aspmx.l.google.com
    alt1.aspmx.l.google.com
    alt2.aspmx.l.google.com

    +1 more

    Domain Information

    cncf.io

    Domain Age
    10y 7m

    Created

    16.07.2015

    Expires

    16.07.2026

    Last Updated

    26.11.2025

    Registrar

    1API GmbH

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Osano

    Cookie Consent Banner
    Osano
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: Osano
    Privacy policy page linked

    Typography & Readability

    Clarity City

    68/100
    Readability
    /30
    20/40

    12px · LH 1.60

    Hierarchy
    /20
    25/25

    6.5x ratio

    WCAG
    /25
    15/15

    Contrast: undefined

    Performance
    /25
    13/20

    1 font

    Heading Font

    Clarity City

    Sans78px

    Body Font

    Clarity City

    Sans12px

    Contrast Ratio

    --

    Reading Comfort

    ~45 CPL

    Needs attention
    78px
    h1
    16px
    h2
    30px
    h3
    16px
    h4
    12px
    p

    ❌ Critical: 12px body text is too small. Increase to at least 14px.

    ✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

    ✅ Strong hierarchy: Headlines are 6.5x 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.

    Buy on MyFonts

    Business & Marketing Stack

    3 Tools Detected

    Advanced

    CRM Systems

    1
    HubSpotMid-Market

    Customer Relationship Management platforms

    Behavior Analytics

    2
    Google Tag ManagerFree
    Google AnalyticsFree

    User behavior and product analytics

    2

    Categories

    3

    Total Tools

    0

    Enterprise

    1

    Mid-Market

    Assessment: Well-developed marketing technology stack

    Sponsored

    Scripts & Styles

    13 Resources

    11
    Scripts
    2
    Styles
    0
    Async
    8
    Defer

    Top Script Sources

    cncf.io(9)lfx-segment.platform.linuxfoundation.org(1)browser-update.org(1)

    Website Identity

    cncf.io

    10 years old
    1API GmbH📧 Google Workspace

    Sponsored

    Last analyzed: 17 Feb 2026 at 08:00

    Historical Analysis & Change Tracking