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.

Technology Comparison

Fancybox vs Quantcast Choice

Side-by-side comparison based on real-world adoption data from 1,817 detections across analyzed websites.

Market Share Distribution

Fancybox (20%)Quantcast Choice (80%)

Total Detections

370

Fancybox

1,447

Quantcast Choice

HIGHER

Websites Using

370

Fancybox

1,447

Quantcast Choice

HIGHER

Used Together

websites use both

2% OVERLAP

Fancybox

Libraries

FancyBox is a tool for displaying images, html content and multi-media in a Mac-style 'lightbox' that floats overtop of web page.

370 detections

370 sites

Visit Website View Profile

Quantcast Choice

Libraries

Quantcast Choice is a free consent management platform to meet key privacy requirements stemming from ePrivacy Directive, GDPR, and CCPA.

1,447 detections

1447 sites

Visit Website View Profile

Our Analysis

Quantcast Choice is significantly more popular than Fancybox in our dataset, appearing on 1447 websites compared to 370. 35 websites use both technologies together (2% overlap). Both are in the Libraries category, making them direct alternatives.

Frequently Asked Questions

What is the difference between Fancybox and Quantcast Choice?

FancyBox is a tool for displaying images, html content and multi-media in a Mac-style 'lightbox' that floats overtop of web page. Quantcast Choice is a free consent management platform to meet key privacy requirements stemming from ePrivacy Directive, GDPR, and CCPA. Both belong to the Libraries category, making them direct alternatives.

Which is more popular, Fancybox or Quantcast Choice?

Based on our analysis of real websites, Quantcast Choice is more widely adopted with 1,447 detections compared to Fancybox's 370.

Can Fancybox and Quantcast Choice be used together?

Yes! We've detected 35 websites that use both Fancybox and Quantcast Choice together, showing they can complement each other in certain setups.

Check Any Website's Technology Stack

Find out if a website uses Fancybox, Quantcast Choice, or any other technology.

Analyze a Website

More Comparisons

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Fancybox vs Quantcast Choice

Market Share Distribution

Fancybox

Quantcast Choice

Our Analysis

Sites Using Both (35)

Only Fancybox

Only Quantcast Choice

Frequently Asked Questions

What is the difference between Fancybox and Quantcast Choice?

Which is more popular, Fancybox or Quantcast Choice?

Can Fancybox and Quantcast Choice be used together?

Check Any Website's Technology Stack

More Comparisons