About StackOptic · The complete web intelligence platform

Built to make the web
understandable.

StackOptic analyzes any public website across 18 specialized modules — technology stack, performance, security, SEO, AI readiness — in under 10 seconds. One URL. One permanent, shareable report.

Analyze a site — Free View Pricing

Analysis modules

Free analyses a day

< 10s

Avg. report time

AI bots audited

Our Mission

Understanding the web shouldn't take hours.

Whether you're a developer researching best practices, a founder vetting a vendor, an agency auditing a client site, or a marketer sizing up a competitor — StackOptic replaces a dozen scattered tools with one unified report. Enter a URL, get the full technical picture: stack, performance, security, SEO, accessibility, and AI visibility — with clear grades and prioritized recommendations.

What we stand for

Principles baked into the product

Transparent by default

Every detection shows its evidence. No black boxes — you can see exactly which signature matched and why.

Fair, honest pricing

Free tier with all modules unlocked. No credit card, no trial tricks, no surprise fees. Cancel anytime.

Always up to date

Detection rules grow as new AI bots, frameworks and privacy trackers appear.

Public data only

We never access private data, log into sites, or run intrusive scans. Only what any visitor would see.

18 Analysis Modules

What StackOptic detects

Every analysis runs specialized modules using real browser execution — JavaScript, CSS, DNS, HTTP, and DOM all inspected in parallel to build a comprehensive report.

Technology Stack

Frameworks, CMS, analytics, payments, fonts, CSS libs. Detected via real browser JS execution, not just headers.

Performance & Core Web Vitals

Lighthouse-calibrated scoring: FCP, LCP, CLS, TBT, SI. Page size, image optimization, lazy loading, CDN detection.

Security Audit

SSL/TLS certificates, 12+ HTTP security headers, HTTPS enforcement, WAF detection. Graded A+ → F with remediation steps.

SEO & Structured Data

Meta tags, Open Graph, Twitter Cards, canonical URLs, robots.txt, sitemap, JSON-LD schema, live SERP preview.

AI & LLM Readiness

GEO score, llms.txt validation, 8 AI bot access audit, machine readability, structured data quality, citation readiness.

Email Infrastructure

SPF, DKIM, DMARC records. Email provider detection, MX configuration, deliverability scoring.

Domain Intelligence

WHOIS/RDAP data — domain age, registrar, creation/expiry dates, DNSSEC status, nameservers.

Privacy & Compliance

30+ consent platforms detected, tracking scripts, cookie analysis, GDPR indicators, TCF/IAB framework.

Typography & Design

Font families, weights, sizes, line heights. Google Fonts, Adobe Fonts, self-hosted typefaces across headings and body.

Color Palette & Visual

Extract brand colors, desktop + mobile screenshots, image optimization (WebP/AVIF), responsive images, image CDNs.

Marketing & Business

CRM platforms, live chat, A/B testing, email marketing, push notifications, advertising networks, BI tools.

Mobile Compatibility

Viewport configuration, responsive design detection, touch-friendly UI analysis, mobile-specific meta tags.

Accessibility

WCAG 2.1 checks, ARIA attributes, color contrast, heading hierarchy, semantic HTML validation.

Carbon Footprint

Live Green Web Foundation API check + CO₂ emission estimation based on page weight and hosting energy source.

Scripts & Resources

JavaScript / CSS inventory, third-party script list, resource loading patterns, bundle size breakdown.

Historical Tracking

Compare snapshots over time. Track technology changes, score trends, infrastructure shifts with visual diffs.

Hosting & Infrastructure

Hosting providers, CDN, WAF, server software, DNS, IP geolocation, reverse DNS, managed WordPress hosts.

Website Identity

NAP (name/address/phone) data, social profiles, business info, favicon, logo detection, brand consistency.

Who uses StackOptic

Built for people who work with websites

Competitive Research

Understand what stack, marketing tools, and security posture your competitors use. Spot their advantages in minutes, not days.

Developer Research

Discover the frameworks, libraries, and infrastructure behind sites you admire. Learn from real production setups — not tutorials.

Business Due Diligence

Evaluate technical maturity of potential partners, vendors, or acquisition targets. One report surfaces red flags instantly.

Design Inspiration

Identify typography, color systems, CSS frameworks behind beautifully designed sites. Build faster with proven patterns.

Agency Client Reports

Generate white-label technical audits for every client. Back recommendations with data, track improvements over time.

Pre-Launch Audits

Surface security gaps, SEO issues, performance bottlenecks, and AI readiness problems before you ship — not after.

How we're different

One report. Real browser. Actionable AI.

Most analyzers stop at “we detected React.” StackOptic goes further: we run a real browser (Patchright / Camoufox), bypass bot protection, measure Core Web Vitals with Lighthouse-calibrated scoring, and feed the full report to AI to generate a prioritized deep-dive.

No stitching together Wappalyzer + PageSpeed + SecurityHeaders + Schema validator + Search Console. One URL, ten seconds, every angle covered.

StackOptic vs typical tools

Technology detection only→Tech + performance + security + SEO + AI readiness
HTTP headers, no JS execution→Real browser, full DOM, executed JS
Blocked by Cloudflare / bot protection→Bypasses CF, Sucuri, LiteSpeed
Static detection, no scoring→Lighthouse-calibrated scores + A+→F grades
You interpret raw data→AI writes a prioritized deep-dive for you

Common questions

About StackOptic

What does StackOptic analyze?

StackOptic runs 18 specialized modules on any publicly accessible website from a single URL: technology stack, Core Web Vitals performance, SSL & HTTP security, SEO meta & structured data, email authentication (SPF/DKIM/DMARC), AI & LLM readiness (llms.txt, bot access, GEO score), accessibility, privacy compliance, carbon footprint, and more.

How is StackOptic different from Wappalyzer or BuiltWith?

Wappalyzer and BuiltWith focus on technology detection. StackOptic adds Lighthouse-calibrated performance scoring, security grading, SEO auditing, AI readiness analysis for LLM search engines, and an AI-written technical deep-dive — all in one report, powered by a real browser that bypasses bot protection.

Who operates StackOptic?

StackOptic is a trading name of Onur Sendere, based at 34-35 Butcher Row, Shrewsbury, SY1 1UW, United Kingdom. Contact: [email protected].

Is there a free plan?

Yes. The Free plan includes 5 analyses per day, all 18 modules, technology detection, security grades, and permanent shareable reports — forever, no credit card required.

Does StackOptic work on sites behind Cloudflare?

Yes. StackOptic uses a real browser engine (Patchright / Camoufox) with a residential proxy pool that successfully analyzes sites protected by Cloudflare, Sucuri, LiteSpeed Cache, and similar systems.

What is AI & LLM readiness?

A 100-point score across 4 categories (Bot Access, Machine Readability, Structured Data, Citation Readiness) that measures how visible and citable your site is to ChatGPT, Perplexity, Google AI Overviews, and other AI search engines. It audits 8 major AI bots, validates llms.txt, and scores JSON-LD quality.

Do I own my analysis reports?

Yes. Every report is permanently hosted at stackoptic.com/site/[domain] with a unique shareable URL. Paid plans can export PDF and JSON for offline use, white-label, or integration.

Ready to see any site clearly?

Your first full technical report is 10 seconds away. Free. No credit card.