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circleci.com

https://circleci.com· First analyzed 18 Feb 2026· Updated 18 Feb 2026
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circleci.com
Desktop screenshot of circleci.com
Mobile screenshot of circleci.com
Mobile

Sponsored

Hosting Provider

aws.amazon.com

IP Address

18.165.122.24

Server Location

🇮🇪 Dublin, Ireland

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

CDN

CloudFront

Nameservers

ns-1572.awsdns-04.co.uk.ns-225.awsdns-28.com.ns-837.awsdns-40.net.ns-1065.awsdns-05.org.

Performance

Page Speed

1 KB
59 requests

Image Optimization

Responsive
0–49
50–89
90–100

Architecture Stack

Headless
⚙️ SSR
Decoupled
Frontend
Styling
Tailwind CSS
API
Data Source
Headless CMS
Contentful
Infrastructure
Hosting
Amazon Web Services (AWS)
CDN
CloudFront

Progressive Web App

Web ManifestApple Touch IconTheme Color

Detected API Sources

//images.ctfassets.net/il1yand...

Technology Stack

13 Technologies Detected

SEO Analysis

B78/100
12
1
1
C
circleci.comcircleci.com

Autonomous validation for the AI era - CircleCI

Deliver production-ready software at AI speed. CircleCI helps modern teams validate, test, and ship every change with intelligent automation.

Title Length47 chars

Recommended: 50-60 chars

Description Length141 chars

Recommended: 120-160 chars

Issues (1)

  • Many images missing alt text (44/46)

Crawlability

Sitemap

Type: standard

206 URLs

robots.txt

19 rules

Sitemap reference found

Sponsored

Sponsored

A+

Security Score

91%Excellent
Static / Informational

HTTPS

No WAF

351d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

06.01.2026

Valid Until

04.02.2027

OCSP Stapling

Enabled

Subject Alternative Names (5)

circleci.comcanary.circleci.comexperiment.circleci.combadges.circleci.comemail.circleci.com

SHA-256 Fingerprint

13:3B:CC:17:62:69:DC:BA:D7:DE:AB:0A:18:99:03:52:C3:DC:AD:74...

Recommendations

Security recommendation preview

HTTP Headers

Developer Console

cache-control
🟡 10s(private,max-age=10)
content-encoding
📦 Gzip(gzip)
content-type
text/html; charset=UTF-8
date
Wed, 18 Feb 2026 08:07:24 GMT
etag
W/"9a62bb119aadc24cd155e6468cf3653d"
feature-policy
autoplay 'none'; camera 'none'
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

95

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

mxa-00672001.gslb.pphosted.com
mxb-00672001.gslb.pphosted.com

Domain Information

circleci.com

Domain Age
14y 5m

Created

01.09.2011

Expires

01.09.2026

Last Updated

11.11.2025

Registrar

Amazon Registrar, Inc.

DNSSEC
Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner
Cookiebot
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: Cookiebot
Privacy policy page linked

Typography & Readability

ui-sans-serif

76/100
Readability
/30
32/40

14px · LH 1.40

Hierarchy
/20
21/25

5.07x ratio

WCAG
/25
15/15

Contrast: undefined

Performance
/25
13/20

1 font

Heading Font

ui-sans-serif

Sans71px

Body Font

ui-sans-serif

Sans14px

Contrast Ratio

--

Reading Comfort

~40 CPL

Needs attention
71px
h1
14px
h2
24px
h3
14px
p

⚠️ Small text: 14px may be hard to read on mobile. Consider 16px+.

✅ Optimal line spacing: 1.40 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 5.1x 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

3 Tools Detected

Advanced

Behavior Analytics

2

User behavior and product analytics

Privacy & Cookies

1

Cookie consent and privacy compliance tools

2

Categories

3

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Well-developed marketing technology stack

Sponsored

Scripts & Styles

21 Resources

17
Scripts
4
Styles
2
Async
0
Defer

Top Script Sources

d2qm0z2kzhiwa.cloudfront.net(15)consent.cookiebot.com(2)

Website Identity

circleci.com

14 years old
Amazon Registrar, Inc.

Sponsored

Last analyzed: 18 Feb 2026 at 08:07

Historical Analysis & Change Tracking