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

Canvas vs Vercel Image

Side-by-side comparison based on real-world adoption data from 535 detections across analyzed websites.

Market Share Distribution

Canvas (1%)Vercel Image (99%)

Total Detections

Canvas

530

Vercel Image

HIGHER

Websites Using

Canvas

530

Vercel Image

HIGHER

Used Together

websites use both

Canvas

UI Libraries

5 detections

5 sites

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Vercel Image

UI Libraries

Vercel Image is an open-source React component and Next.js Image component optimization for modern web development. It automatically optimizes images for faster loading times and improved user experience, supporting modern formats like WebP and AVIF.

530 detections

530 sites

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Our Analysis

Vercel Image is significantly more popular than Canvas in our dataset, appearing on 530 websites compared to 5. Both are in the UI Libraries category, making them direct alternatives.

Sites Using Both (0)

No sites use both technologies together.

Only Canvas

aerotime.aero hackread.com hightimes.com machinelearningmastery.com psmag.com

Only Vercel Image

123rf.com 1clickwebsite.ai 23andme.com a-ads.com acr.org addictinggames.com adecco.com adoptapet.com adoptium.net aeroflot.ru

Frequently Asked Questions

What is the difference between Canvas and Vercel Image?

Canvas is a JavaScript API that provides a way to draw graphics, animations, and other visual images on a web page. It is part of the HTML5 standard and is widely used for creating interactive visualizations, games, and complex user interfaces. Vercel Image is an open-source React component and Next.js Image component optimization for modern web development. It automatically optimizes images for faster loading times and improved user experience, supporting modern formats like WebP and AVIF. Both belong to the UI Libraries category, making them direct alternatives.

Which is more popular, Canvas or Vercel Image?

Based on our analysis of real websites, Vercel Image is more widely adopted with 530 detections compared to Canvas's 5.

Can Canvas and Vercel Image 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 Canvas, Vercel Image, or any other technology.

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