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

Vercel vs Netlify

Side-by-side comparison based on real-world adoption data from 274 detections across analyzed websites.

Market Share Distribution

Vercel (73%)Netlify (27%)

Total Detections

200

Vercel

HIGHER

Netlify

Websites Using

200

Vercel

HIGHER

Netlify

Used Together

websites use both

Vercel

Hosting

Frontend cloud platform optimized for Next.js. Provides instant global deployments, edge functions, and automatic preview environments.

200 detections

200 sites

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Netlify

Hosting

Modern web hosting platform for Jamstack sites with continuous deployment from Git, serverless functions, and edge network.

74 detections

74 sites

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Our Analysis

Vercel has a slight edge over Netlify, detected on 200 vs 74 websites. Both are in the Hosting category, making them direct alternatives.

Sites Using Both (0)

No sites use both technologies together.

Only Vercel

1clickwebsite.ai adjust.com aeon.co animated-icons.vercel.app animequiz.net animoto.com audiogearprices.com barstoolsports.com bcorporation.net bestecasinosechtgeld.com

Only Netlify

a16z.com adyen.com amp.dev ampproject.org anker.com armani.com asana.com astro.build audacityteam.org babeljs.io

Frequently Asked Questions

What is the difference between Vercel and Netlify?

Frontend cloud platform optimized for Next.js. Provides instant global deployments, edge functions, and automatic preview environments. Modern web hosting platform for Jamstack sites with continuous deployment from Git, serverless functions, and edge network. Both belong to the Hosting category, making them direct alternatives.

Which is more popular, Vercel or Netlify?

Based on our analysis of real websites, Vercel is more widely adopted with 200 detections compared to Netlify's 74.

Can Vercel and Netlify be used together?

In our current dataset, no websites use both technologies simultaneously. This suggests they typically serve as alternatives rather than complementary tools.

Check Any Website's Technology Stack

Find out if a website uses Vercel, Netlify, or any other technology.

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