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

nngroup.com

https://nngroup.com· First analyzed 12 Feb 2026· Updated 12 Feb 2026

Export

nngroup.com

Mobile

Sponsored

Hosting Provider

Sucuri

IP Address

192.124.249.113

Server Location

🇺🇸 Menifee, United States

ASN

AS30148

Organization

Sucuri

Server

Sucuri/Cloudproxy

CDN

Sucuri

WAF

Sucuri

Nameservers

ns1.dnsimple.com.ns2.dnsimple.com.ns3.dnsimple.com.ns4.dnsimple.com.

Performance

Page Speed

132 KB

46 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Sucuri

CDN

Sucuri

Technology Stack

11 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel Lucky Orange

Advertising

Google Ads LinkedIn Ads

CSS Frameworks

Icon Libraries

Tag Managers

Email Marketing

Security

SEO Analysis

A82/100

nngroup.comnngroup.com

Nielsen Norman Group: UX Training, Consulting, & Research - NN/G

A leader in the user experience field, NN/g conducts groundbreaking research, trains and certifies UX practitioners, and provides UX consulting to clients.

Title Length65 chars

Recommended: 50-60 chars

Description Length155 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

2,653 URLs

robots.txt

36 rules

Sponsored

Security Score

69%Fair

Interactive

HTTPS

WAF

24d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Starfield Technologies, Inc.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

09.12.2025

Valid Until

09.03.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

nngroup.comwww.nngroup.com

SHA-256 Fingerprint

99:D4:2A:EC:AE:3E:59:35:50:3D:76:0F:FE:FE:99:4A:DF:8A:3D:68...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

age

2018

alt-svc

h3=":443"; ma=2592000, h3-29=":443"; ma=2592000

cache-control

🟡 4 Hours(max-age=14400)

content-encoding

📦 Gzip(gzip)

content-length

30998

content-security-policy-report-only

style-src 'self' https://s3.amazonaws.com/media.nngroup.com/...

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (5)

alt2.aspmx.l.google.com

aspmx3.googlemail.com

aspmx2.googlemail.com

alt1.aspmx.l.google.com

+1 more

Domain Information

nngroup.com

Domain Age

27y 6m

Created

07.08.1998

Expires

09.01.2029

Last Updated

24.09.2024

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

CookieYes

Cookie Consent Banner

CookieYes

GDPR Indicators

Cookie consent banner detected

CMP: CookieYes

Typography & Readability

Inter

76/100

Readability

/30

32/40

14px · LH 1.40

Hierarchy

/20

21/25

3.57x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Inter

Sans50px

Body Font

Inter

Sans14px

Contrast Ratio

Reading Comfort

~35 CPL

Needs attention

50px

32px

20px

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 3.6x larger than body text.

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

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

✅ Protected text on images: Using gradient for readability.

Buy on MyFontsVariable Fonts

Business & Marketing Stack

8 Tools Detected

Enterprise

Marketing Automation

MailchimpSMB

Email marketing and automation platforms

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

LinkedIn AdsEnterprise

Google AdsEnterprise

Microsoft AdsEnterprise

Ad platforms and retargeting pixels

Privacy & Cookies

CookieYesSMB

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

15 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(3)media.nngroup.com(3)connect.facebook.net(2)cdn-cookieyes.com(2)tools.luckyorange.com(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn YouTube Bluesky

Sponsored

Last analyzed: 12 Feb 2026 at 16:26

Historical Analysis & Change Tracking