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.

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vumc.org

https://vumc.org· First analyzed 20 Feb 2026· Updated 20 Feb 2026

Export

vumc.org

Sponsored

Hosting Provider

Pantheon

aws.amazon.com

IP Address

34.225.206.76

Server Location

🇺🇸 Ashburn, United States

ASN

AS14618

Organization

AWS EC2 (us-east-1)

Server

Nginx

CDN

Fastly

Nameservers

ns1.vumc.org.ns2.vumc.org.

Performance

Page Speed

1.6 MB

122 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Drupal

Technology Stack

9 Technologies Detected

CSS Frameworks

Libraries

Icon Libraries

Fonts

Analytics

Tag Managers

Web Servers

SEO Analysis

D58/100

vumc.orgvumc.org

Vanderbilt University Medical Center |

No description available for this page.

Title Length38 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description - important for click-through rates

5 issues found

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Security Score

81%Very Good

Interactive

HTTPS

No WAF

180d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

21.07.2025

Valid Until

19.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.vumc.orgvumc.org

SHA-256 Fingerprint

76:74:5A:55:A5:08:7A:63:D6:F5:C6:3B:08:7C:89:B8:6C:DA:DD:77...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

age

10447

cache-control

🟡 6 Hours(max-age=21600, public)

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

content-language

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

vumc-org.mail.protection.outlook.com

Domain Information

vumc.org

Domain Age

26y 1m

Created

31.12.1999

Expires

31.12.2026

Last Updated

29.09.2025

Registrar

Network Solutions, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Arial

71/100

Readability

/30

40/40

16px · LH 1.60

Hierarchy

/20

13/25

1.75x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

10/20

3 fonts

Heading Font

Arial

Sans28px

Body Font

Arial

Sans16px

Contrast Ratio

Reading Comfort

~42 CPL

Needs attention

28px

13px

16px

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

✅ Good hierarchy: Clear distinction between headlines and body text.

✅ Consistent design: Single font family with weight variations is a modern best practice.

⚠️ Cramped layout: 12 elements lack adequate spacing.

GGoogle Fonts

Business & Marketing Stack

3 Tools Detected

Enterprise

Marketing Automation

MarketoEnterprise

Email marketing and automation platforms

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

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Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(11)assets.adobedtm.com(4)munchkin.marketo.net(2)googletagmanager.com(2)s.swiftypecdn.com(1)

Website Identity

Facebook Instagram LinkedIn

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Last analyzed: 20 Feb 2026 at 03:41

Historical Analysis & Change Tracking