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.

Fathom - Websites Using Fathom

What Is Fathom Analytics?

Fathom is a privacy-first website analytics platform that provides clear, useful insights without tracking personal data. Founded by Paul Jarvis and Jack Ellis, Fathom has processed billions of page views for thousands of customers while maintaining a strict commitment to visitor privacy.

Privacy Without Compromise

Fathom does not use cookies, does not collect IP addresses, and does not build user profiles. The platform is GDPR, CCPA, ePrivacy, and PECR compliant by design. Intelligent tracking uses a hash-based approach to count unique visitors without identifying them.

Simple Dashboard

The single-screen dashboard presents visitors, page views, average time on site, bounce rate, and top pages. Traffic sources are broken down by referrer, UTM parameters, and search terms. Device and browser data help understand the audience composition.

Performance

Fathom's tracking script loads from a global CDN and executes in microseconds. It does not slow down page loads or affect Core Web Vitals scores. The script also bypasses most ad blockers because it does not track personal data.

Why Use Fathom

Privacy-conscious website owners and businesses operating under strict data protection regulations choose Fathom for compliant analytics that still provide actionable insights.

Fathom

Websites Using Fathom

What Is Fathom Analytics?

Privacy Without Compromise

Simple Dashboard

Performance

Why Use Fathom

Alternatives to Fathom

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