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

Stackable Ultimate Gutenberg Blocks vs Contact Form 7

Side-by-side comparison based on real-world adoption data from 342 detections across analyzed websites.

Market Share Distribution

Stackable Ultimate Gutenberg Blocks (3%)Contact Form 7 (97%)

Total Detections

Stackable Ultimate Gutenberg Blocks

333

Contact Form 7

HIGHER

Websites Using

Stackable Ultimate Gutenberg Blocks

333

Contact Form 7

HIGHER

Used Together

websites use both

1% OVERLAP

Stackable Ultimate Gutenberg Blocks

Plugins

9 detections

9 sites

Visit Website View Profile

Contact Form 7

Plugins

Free WordPress contact form plugin supporting multiple forms, AJAX submission, CAPTCHA integration, and Akismet spam filtering.

333 detections

333 sites

Visit Website View Profile

Our Analysis

Contact Form 7 is significantly more popular than Stackable Ultimate Gutenberg Blocks in our dataset, appearing on 333 websites compared to 9. 3 websites use both technologies together (1% overlap). Both are in the Plugins category, making them direct alternatives.

Frequently Asked Questions

What is the difference between Stackable Ultimate Gutenberg Blocks and Contact Form 7?

Stackable Ultimate Gutenberg Blocks is a comprehensive suite of advanced WordPress blocks designed to enhance the capabilities of the Gutenberg editor. It offers a wide array of pre-designed sections, custom blocks, and design options to help users create visually appealing and functional websites without extensive coding knowledge. Free WordPress contact form plugin supporting multiple forms, AJAX submission, CAPTCHA integration, and Akismet spam filtering. Both belong to the Plugins category, making them direct alternatives.

Which is more popular, Stackable Ultimate Gutenberg Blocks or Contact Form 7?

Based on our analysis of real websites, Contact Form 7 is more widely adopted with 333 detections compared to Stackable Ultimate Gutenberg Blocks's 9.

Can Stackable Ultimate Gutenberg Blocks and Contact Form 7 be used together?

Yes! We've detected 3 websites that use both Stackable Ultimate Gutenberg Blocks and Contact Form 7 together, showing they can complement each other in certain setups.

Check Any Website's Technology Stack

Find out if a website uses Stackable Ultimate Gutenberg Blocks, Contact Form 7, or any other technology.

Analyze a Website

More Comparisons

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Stackable Ultimate Gutenberg Blocks vs Contact Form 7

Market Share Distribution

Stackable Ultimate Gutenberg Blocks

Contact Form 7

Our Analysis

Sites Using Both (3)

Only Stackable Ultimate Gutenberg Blocks

Only Contact Form 7

Frequently Asked Questions

What is the difference between Stackable Ultimate Gutenberg Blocks and Contact Form 7?

Which is more popular, Stackable Ultimate Gutenberg Blocks or Contact Form 7?

Can Stackable Ultimate Gutenberg Blocks and Contact Form 7 be used together?

Check Any Website's Technology Stack

More Comparisons