What does StackOptic analyze?

StackOptic runs 18 analysis modules on any public website from a single URL. It detects 7,000+ technologies (CMS, frameworks, analytics, payments, CDN, hosting), evaluates SSL certificates and HTTP security headers with grades from A+ to F, measures Core Web Vitals (LCP, CLS, TBT, FCP), audits SEO meta tags and structured data, checks email security (SPF, DKIM, DMARC), analyzes AI & LLM readiness including bot access and llms.txt validation, extracts color palettes and typography, estimates carbon footprint, and generates permanent shareable reports.

Does it work on sites behind Cloudflare or bot protection?

Yes. StackOptic uses a real browser engine that loads pages exactly like a human visitor — executing JavaScript, rendering CSS, and handling redirects. This allows it to bypass Cloudflare, LiteSpeed, Sucuri, and other bot protection systems where traditional crawlers and HTTP-only tools fail.

What do I get on the free plan?

The free plan includes 5 analyses per day with access to all 18 modules, full scores, technology detection, and security grades. Every report is permanently accessible via a unique shareable URL — no login required to view. No credit card needed. AI-powered insights, re-analysis, PDF/JSON export, and comparison features are available on Pro ($24/mo) and Agency ($99/mo) plans.

What is AI & LLM readiness analysis?

This module evaluates how visible and citable your website is to AI search engines like ChatGPT, Perplexity, Google AI Overviews, and Claude. It audits access permissions for 8 major AI bots, validates llms.txt and llms-full.txt files, scores citation-ready content structure, and analyzes structured data (JSON-LD) for GEO readiness — helping you rank in the next generation of search.

How long does an analysis take?

Most analyses complete in under 10 seconds. StackOptic runs all 18 modules in parallel using a real browser session, so you get technology detection, security audit, performance metrics, SEO analysis, and AI readiness scoring simultaneously.

How accurate are the results?

Detection is based on real browser execution — DOM inspection, JavaScript runtime analysis, HTTP headers, and DNS records. With 7,000+ technology signatures and Lighthouse-calibrated performance scoring, StackOptic achieves high accuracy for mainstream technologies.

What security checks are performed?

The security module evaluates SSL/TLS certificates, 12+ HTTP security headers (HSTS, CSP, X-Frame-Options, Permissions-Policy, Referrer-Policy), HTTPS enforcement, and email authentication (SPF, DKIM, DMARC). Each site receives a letter grade from A+ to F with specific remediation steps.

Do you store the websites I analyze?

StackOptic only stores publicly available information that any visitor to a website would see — HTML content, HTTP headers, DNS records, and screenshots. We do not access private data, log in to websites, or perform any intrusive testing.

Back to Search

duke.edu

https://duke.edu· First analyzed 11 Feb 2026· Updated 11 Feb 2026

Export

duke.edu

Mobile

Sponsored

Hosting Provider

Duke University

IP Address

152.3.70.87

Server Location

🇺🇸 Durham, United States

ASN

AS13371

Organization

Duke University

Server

Apache

Nameservers

dns-nc1-01.oit.duke.edu.dns-auth-02.oit.duke.edu.dns-auth-01.oit.duke.edu.

Performance

Page Speed

3.4 MB

52 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.9.1

cms

duke-block-homepageCustom

Technology Stack

10 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Microsoft Clarity

Plugins

Duke Blocks Duke Alertbar

Libraries

CSS Frameworks

Tag Managers

Web Servers

SEO Analysis

A82/100

duke.eduduke.edu

Duke University - Fueled by creativity, informed by scholarship

Fueled by creativity, informed by scholarship

Title Length63 chars

Recommended: 50-60 chars

Description Length45 chars

Recommended: 120-160 chars

Issues (0)

2 issues found

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Security Score

21%Critical

Interactive

HTTPS

No WAF

76d

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

connection

content-encoding

📦 Gzip(gzip)

content-length

35759

content-type

text/html

date

Wed, 11 Feb 2026 01:17:56 GMT

Good Warning Issue

Typography & Readability

Quattrocento + Montserrat

73/100

Readability

/30

32/40

14px · LH 1.40

Hierarchy

/20

18/25

8.33x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Quattrocento

Sans120px

Body Font

Montserrat

Sans14px

Contrast Ratio

Reading Comfort

~34 CPL

Needs attention

120px

42px

28px

14px

⚠️ 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 8.3x larger than body text.

✅ Good performance: Using 2 font families keeps load times fast.

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

✅ Protected text on images: Using text-shadow for readability.

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Business & Marketing Stack

3 Tools Detected

Growing

Behavior Analytics

Microsoft ClarityFree

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

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Scripts & Styles

26 Resources

Scripts

Styles

Async

Defer

Top Script Sources

duke.edu(10)youtube.com(2)googletagmanager.com(2)scripts.clarity.ms(1)clarity.ms(1)

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Last analyzed: 11 Feb 2026 at 01:18

Historical Analysis & Change Tracking