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.

W3 Total Cache - Websites Using W3 Total Cache

What Is W3 Total Cache?

W3 Total Cache is a comprehensive free WordPress performance optimization plugin that provides page caching, database caching, object caching, browser caching, and CDN integration. Created by Frederick Townes, it has been a staple of WordPress performance optimization since 2009.

Caching Layers

W3 Total Cache provides multiple caching layers. Page Cache stores complete HTML pages. Database Cache caches query results to reduce database load. Object Cache stores computed data using Memcached, Redis, or APCu. Browser Cache sets headers for client-side caching. Fragment Cache stores portions of pages for sites with mixed static and dynamic content.

CDN Integration

The plugin integrates with CDN providers including Cloudflare, Amazon CloudFront, MaxCDN, and generic push/pull CDN configurations. Static assets are served from CDN edge locations for faster delivery.

Minification

CSS, JavaScript, and HTML minification reduce file sizes. Files can be combined to reduce HTTP requests. Manual control over which files are minified and combined provides flexibility for sites where automatic optimization causes conflicts.

Advanced Configuration

W3 Total Cache exposes more configuration options than most caching plugins, providing control over cache storage backends, cache lifetimes, purge rules, and optimization settings. This flexibility serves advanced users and hosting environments with specific requirements.

Why Choose W3 Total Cache

WordPress users wanting comprehensive, free caching with granular control over every optimization layer choose W3 Total Cache. Its extensive configuration options serve advanced users and complex hosting environments that need precise cache management.

W3 Total Cache

Websites Using W3 Total Cache

What Is W3 Total Cache?

Caching Layers

CDN Integration

Minification

Advanced Configuration

Why Choose W3 Total Cache

Alternatives to W3 Total Cache

Compare W3 Total Cache

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