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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yadvashem.org

https://yadvashem.org· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

yadvashem.org

Sponsored

Hosting Provider

013 Netvision Network

IP Address

62.90.197.116

Server Location

🇮🇱 Giv‘atayim, Israel

ASN

AS1680

Server

Nginx

Nameservers

nypop.netvision.net.il.dns.netvision.net.il.

Performance

Page Speed

5.6 MB

105 requests

Image Optimization

Lazy LoadWebPAVIFResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Drupal

Technology Stack

14 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel FullStory

Advertising

Google Ads LinkedIn Ads Taboola

Meta Frameworks

Libraries

UI Components

CSS Frameworks

Icon Libraries

Tag Managers

Web Servers

SEO Analysis

A80/100

yadvashem.orgyadvashem.org

Yad Vashem – The World Holocaust Remembrance Center

Established in 1953 by an act of the Knesset (Israeli Parliament), Yad Vashem, the World Holocaust Remembrance Center, is entrusted with Holocaust commemorat...

Description truncated.

Title Length51 chars

Recommended: 50-60 chars

Description Length476 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

84 rules

Sitemap reference found

Sponsored

Security Score

45%Critical

No SSL

No WAF

N/A

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 900s(max-age=900, public)

content-encoding

⚡ Brotli(br)

content-language

content-security-policy

frame-ancestors 'self'

content-type

text/html; charset=UTF-8

date

Tue, 17 Feb 2026 06:38:34 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

yadvashem.in.tmes.trendmicro.com

Domain Information

yadvashem.org

Domain Age

28y 4m

Created

14.10.1997

Expires

13.10.2026

Last Updated

17.08.2021

Registrar

Network Solutions, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Roboto

91/100

Readability

/30

40/40

18px · LH 1.40

Hierarchy

/20

21/25

2.67x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Roboto

Sans48px

Body Font

Roboto

Sans18px

Contrast Ratio

Reading Comfort

~34 CPL

Needs attention

48px

36px

18px

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

✅ Optimal line spacing: 1.40 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.7x larger than body text.

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

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

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

Business & Marketing Stack

6 Tools Detected

Enterprise

Behavior Analytics

FullStoryEnterprise

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

LinkedIn AdsEnterprise

TaboolaMid-Market

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

23 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(6)connect.facebook.net(6)d221oziut8gs4d.cloudfront.net(1)edge.fullstory.com(1)snap.licdn.com(1)

Website Identity

Facebook X (Twitter)Instagram YouTube Pinterest

Sponsored

Last analyzed: 17 Feb 2026 at 06:38

Historical Analysis & Change Tracking