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.

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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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911memorial.org

https://911memorial.org· First analyzed 20 Feb 2026· Updated 20 Feb 2026

Export

911memorial.org

Sponsored

Hosting Provider

Aptum Technologies

IP Address

69.172.200.86

Server Location

🇳🇱 Amsterdam, The Netherlands

ASN

AS19324

Organization

Aptum Technologies

Server

Nginx

CDN

Nameservers

pdns01.domaincontrol.com.pdns02.domaincontrol.com.

Performance

Page Speed

1.4 MB

132 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Drupal

Technology Stack

19 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel Clicky Crazy Egg Microsoft Clarity Segment

Advertising

Google Ads Twitter Ads LinkedIn Ads TikTok Pixel Microsoft Advertising

Libraries

Other

CSS Frameworks

Icon Libraries

Tag Managers

Payments

Web Servers

SEO Analysis

D41/100

911memorial.org911memorial.org

Homepage | National September 11 Memorial & Museum

No description available for this page.

Title Length50 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

• Missing meta description - important for click-through rates
• Missing H1 tag - every page should have one H1
• Many images missing alt text (11/19)

6 issues found

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Crawlability

Sitemap

Type: standard

336 URLs

robots.txt

53 rules

Sponsored

Security Score

25%Critical

Critical / Transactional

HTTPS

No WAF

37d

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

26.02.2025

Valid Until

29.03.2026

OCSP Stapling

Enabled

Subject Alternative Names (3)

*.911memorial.org911memorial.orgwww.911memorial.org

SHA-256 Fingerprint

0F:7A:32:E2:78:03:4C:CE:04:FE:F3:2C:68:A9:C7:B4:73:AD:D5:A9...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

access-control-allow-origin

age

2516

cache-control

🟡 3 Hours(max-age=10800, public)

connection

keep-alive

content-encoding

📦 Gzip(gzip)

Good Warning Issue

Email Infrastructure

Mimecast

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

usb-smtp-inbound-2.mimecast.com

usb-smtp-inbound-1.mimecast.com

Domain Information

911memorial.org

Domain Age

24y 5m

Created

11.09.2001

Expires

11.09.2026

Last Updated

26.10.2025

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

Typography & Readability

Surveyor Fine A + Gotham A

43/100

Readability

/30

32/40

16px · LH 1.25

Hierarchy

/20

8/25

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Surveyor Fine A

Sans

Body Font

Gotham A

Sans16px

Contrast Ratio

Reading Comfort

~41 CPL

Needs attention

48px

40px

10px

16px

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

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

⚠️ Risky: Text appears on background images without overlay protection.

⚠️ Cramped layout: 21 elements lack adequate spacing.

✅ Clean layout: Consistent left alignment throughout.

Buy on MyFonts

Business & Marketing Stack

11 Tools Detected

Enterprise

Behavior Analytics

Microsoft ClarityFree

Crazy EggSMB

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

LinkedIn AdsEnterprise

TikTok PixelMid-Market

Microsoft AdsEnterprise

Reddit PixelMid-Market

Twitter/X AdsMid-Market

Ad platforms and retargeting pixels

Social Media

Twitter/X WidgetsFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

24 Resources

Scripts

Styles

Async

Defer

Top Script Sources

analytics.tiktok.com(3)connect.facebook.net(3)google-analytics.com(2)scripts.clarity.ms(1)cdn.boomtrain.com(1)

Website Identity

Facebook X (Twitter)Instagram YouTube TikTok

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Last analyzed: 20 Feb 2026 at 13:04

Historical Analysis & Change Tracking