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

nm.org

https://nm.org· First analyzed 18 Feb 2026· Updated 18 Feb 2026

Export

nm.org

Sponsored

Hosting Provider

Northwestern Memorial Hospital

IP Address

204.62.118.87

Server Location

🇺🇸 Chicago, United States

ASN

AS19247

Organization

Northwestern Memorial Hospital

Server

Microsoft IIS

CDN

Azure Cdn

Nameservers

ns1-09.azure-dns.com.ns2-09.azure-dns.net.ns3-09.azure-dns.org.ns4-09.azure-dns.info.

Performance

Page Speed

33.7 MB

51 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

React

Styling

Tailwind CSS

Infrastructure

Hosting

Northwestern Memorial Hospital

CDN

Azure Cdn

Technology Stack

15 Technologies Detected

Analytics

Google Analytics

Hotjar

Matomo

Icon Libraries

Font Awesome Material Icons

Frameworks

Meta Frameworks

Libraries

Other

UI Components

Other

CSS Frameworks

Fonts

Tag Managers

Web Servers

SEO Analysis

B76/100

nm.orgnm.org

Northwestern Medicine | Northwestern Medicine

Northwestern Medicine is a leader in quality healthcare and service, bringing together faculty, physicians and researchers to support and advance that care t...

Description truncated.

Title Length45 chars

Recommended: 50-60 chars

Description Length217 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

15 rules

Sponsored

Security Score

46%Poor

Interactive

HTTPS

No WAF

45d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

SSL Corporation

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

04.04.2025

Valid Until

04.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (20)

nm.orgwww.nm.orgwww.nmh.orgbav.nm.orgcentegra.orgwww.centegra.orglfh.orgwww.lfh.org+12 more

SHA-256 Fingerprint

6B:DA:4F:E6:2D:8B:BE:56:88:B6:BC:2B:F1:23:E2:0A:26:54:A4:4F...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ch

Sec-CH-UA-Full-Version-List,Sec-CH-UA-Platform-Version,Sec-C...

cache-control

🔴 No Cache(no-cache, no-store)

content-length

85845

content-type

text/html; charset=utf-8

date

Wed, 18 Feb 2026 05:37:42 GMT

expires

-1

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

nm-org.mail.protection.outlook.com

Domain Information

nm.org

Domain Age

37y 5m

Created

09.09.1988

Expires

08.09.2034

Last Updated

26.03.2025

Registrar

Network Solutions, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

Typography & Readability

Helvetica

73/100

Readability

/30

40/40

18px · LH 1.60

Hierarchy

/20

15/25

1x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Helvetica

Sans18px

Body Font

Helvetica

Sans18px

Contrast Ratio

Reading Comfort

~35 CPL

Needs attention

18px

36px

18px

20px

18px

Minor Third

Scale

✅ Excellent readability: 18px body text is ideal for all devices.

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

✅ Good performance: Using 1 font families keeps load times fast.

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

⚠️ Cramped layout: 20 elements lack adequate spacing.

GGoogle Fonts

Business & Marketing Stack

4 Tools Detected

Growing

Behavior Analytics

HotjarMid-Market

Google Tag ManagerFree

Matomo (Piwik)Mid-Market

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

26 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(5)cdnjs.cloudflare.com(3)nm.containers.piwik.pro(2)img.en25.com(1)googletagmanager.com(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn YouTube TikTok Pinterest

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Last analyzed: 18 Feb 2026 at 05:38

Historical Analysis & Change Tracking