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.

Yoast SEO - Websites Using Yoast SEO

What Is Yoast SEO?

Yoast SEO is the most popular WordPress SEO plugin with over 13 million active installations. Founded by Joost de Valk in 2010 and acquired by Newfold Digital in 2021, Yoast SEO provides comprehensive on-page SEO analysis, XML sitemaps, schema markup, and content optimization tools that make search engine optimization accessible to WordPress users of all skill levels.

Content Analysis

Yoast's real-time content analysis evaluates pages against SEO best practices as content is written. The plugin checks keyword placement in titles, headings, meta descriptions, URLs, and body content. It evaluates content length, internal linking, image alt text, and keyword density, providing color-coded indicators for each factor.

Readability Analysis evaluates content structure including sentence length, paragraph length, transition words, passive voice usage, Flesch reading ease score, and subheading distribution. This dual analysis ensures content is optimized for both search engines and human readers.

Technical SEO

XML Sitemaps are generated automatically and submitted to search engines. The sitemaps update as content is published, modified, or removed. Canonical URLs prevent duplicate content issues. Meta robots tags control indexing on a per-page basis.

Schema Markup generates structured data in JSON-LD format for articles, pages, breadcrumbs, organizations, and other entity types. The schema output helps search engines understand content context and can enable rich results in search listings.

Social Media Integration

Open Graph and Twitter Card meta tags are configured for each page, controlling how content appears when shared on social media platforms. Custom images, titles, and descriptions can be set for social sharing independently of SEO settings.

Breadcrumbs

Yoast generates SEO-friendly breadcrumb navigation that can be displayed on the site and included in search results through structured data. Breadcrumbs improve both user navigation and search engine understanding of site hierarchy.

Premium Features

Yoast SEO Premium adds internal linking suggestions, redirect management, multiple focus keywords per page, social media previews, and content insights. The premium version also removes ads from the WordPress admin interface.

Why Choose Yoast SEO

WordPress site owners wanting comprehensive, accessible SEO tools choose Yoast for its real-time content analysis, automatic technical SEO management, and the breadth of optimization it provides without requiring SEO expertise.

Yoast SEO

Websites Using Yoast SEO