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 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.

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.

Comprehensive analysis platform

Launch offer — 50% off your first month

On Solo & Pro monthly plans · use your code at checkout

See plans

Every layer of your
website, analysed.

Tech stack, performance, security, SEO, GEO (AI search) and local SEO — one report, in seconds. Free. No sign-up.

✓ 18 modules·✓ 7,000+ tech signatures·✓ Real browser·✓ Permanent reports

stackoptic.com/site/digiwings.co.uk

Performance

Security

A+

AI/GEO

Detected Technologies

Next.jsVercelCloudflareStripeTailwind CSSPlausibleSentryGoogle Fonts

What is StackOptic?

StackOptic is a comprehensive website analysis platform. It runs 18 specialised modules — technology detection, Core Web Vitals, security, SEO, GEO (AI search readiness), local SEO, accessibility, email infrastructure, carbon footprint and more — against any public URL and produces a single shareable report in seconds.

Live · refreshed every 6 hours

Analyses run

across all users

Unique domains

analysed at least once

Technologies tracked

detected on analyses

Countries covered

geo-located sites

What you get

See exactly what a report looks like.

A live report for digiwings.co.uk — no sign-up required.

Report overview

digiwings.co.uk

Overall

Performance

Security

SEO

AI / GEO

Accessibility

Modules passed

17/18

Report generated

8.4s

Technologies

Country

🇬🇧 GB

See full sample report

One URL · 18 modules

Everything you need to know
about any website.

Calibrated by real browsers. Updated continuously. Grouped into a single shareable report.

Technology detection

7,000+ signatures

Frameworks, CMS, analytics, payments, CDNs — detected from a real browser session, not just headers.

ReactNext.jsVercelCloudflareStripeTailwindReactNext.jsVercelCloudflareStripeTailwindReactNext.jsVercelCloudflareStripeTailwind

WordPressShopifyGTMSegmentAWSNginxWordPressShopifyGTMSegmentAWSNginxWordPressShopifyGTMSegmentAWSNginx

Core Web Vitals

Lighthouse-calibrated

FCP, LCP, CLS, TBT, Speed Index — measured and scored the same way Google does.

LCP

1.2s

CLS

0.02

TBT

90ms

Security audit

A+ → F

SSL/TLS, HSTS, CSP, 12+ security headers graded with remediation steps.

A+

HSTSCSPXFOSPFDKIMDMARC

SEO & structured data

Live SERP preview

Meta, Open Graph, JSON-LD, canonical, sitemap, robots.txt.

example.com › page

Live SERP preview — pixel-accurate

Title · meta · Open Graph · JSON-LD · canonical · sitemap.

AI & GEO readiness

Exclusive

llms.txt, 8 AI bot access scores, citation readiness for ChatGPT / Perplexity / Google AI.

GPT

Claude

Perp

Goog

Bing

Apple

Byte

Local SEO

Exclusive

NAP consistency, local schema, Google Business alignment. 46% of searches are local.

NAP consistency · ✓

LocalBusiness schema · ✓

Google Business · synced

Email infrastructure

SPF · DKIM · DMARC

MX, email provider detection, deliverability scoring — catch misconfigs before inboxes.

SPF

Pass

DKIM

Pass

DMARC

Pass

Accessibility

WCAG 2.1

ARIA, contrast, heading hierarchy, semantic HTML — inclusive by default.

ContrastAA

ARIA17/20

Carbon footprint

Green Web Foundation

Live GWF API + SWDM v4 CO₂ estimate from page weight and hosting energy.

0.24g CO₂

per visit · cleaner than 78% of sites

Privacy & compliance

30+ platforms

Cookie consent, GDPR indicators, TCF/IAB framework, tracking inventory.

CookiebotOneTrustTCF v2GDPR bannerIubenda

Domain intelligence

WHOIS + DNSSEC

Registrar, creation/expiry, nameservers, DNSSEC, reverse DNS — full provenance.

RegistrarCloudflare, Inc.

Created2021-08-14

DNSSECsigned

Nameserversns1.cloudflare.com

Historical tracking

Pro

Compare snapshots over time. Track changes, score trends and infrastructure shifts.

+21pts

last 30 days

↗ trending

Why StackOptic

The only tool that sees
the whole website.

Point tools each do one thing. StackOptic replaces four of them and adds what nobody else audits.

Capability	Lighthouse	Ahrefs	StackOptic
Tech stack (7k+ signatures)
Real browser execution
Security audit (A+ → F)	partial
Core Web Vitals
SEO + structured data	partial
AI & GEO readiness			Exclusive
Local SEO		partial	Exclusive
Email infrastructure
Carbon footprint
AI deep-dive writeup

How it works

From URL to report
in seconds.

Demo video · swap-ready

01
Paste any URL
No browser extensions. No account required. Just paste and hit Analyze.
02
18 modules run in parallel
A real browser loads the page — bypassing bot protection — and runs every check simultaneously.
03
Get a permanent, shareable report
Scores, grades, detected technologies, AI-written insights — all in one URL you can share with clients.

Who it's for

Built for people who
work with websites.

Agencies & freelancers

White-label client audits, pitch decks built from real data, bulk analysis at scale.

Developers

Audit stacks before you touch the code. Spot outdated dependencies and security gaps fast.

Marketers & SEOs

Know exactly what tools competitors run. Audit GEO, local SEO and structured data in one pass.

Founders & PMs

Pre-launch checklist, investor-ready reports, technical debt surfaced before it bites.

Pro & Agency

Not just data. Answers.

StackOptic's AI reads your entire report and writes a technical deep-dive — architecture decisions, missed opportunities, prioritized fixes. Ask follow-up questions in chat.

Full technical analysis written per report
Interactive AI chat for follow-up questions
AI readiness scoring for LLM search visibility
Prioritized, actionable recommendations

See Pro plan features

Scroll-reveal · swap-ready

What people say

Trusted by web professionals.

“I've never seen such a comprehensive report in my life; it's turned out to be a brilliant product.”

Onur Arslan

Developer

“We replaced three separate tools with StackOptic. The AI deep-dive alone saves us hours per client audit. Our team won't go back.”

Sarah Mitchell

Agency Owner, Pixel & Code

“The AI readiness module is a game-changer. No other tool checks llms.txt validation and bot access scoring. It's part of my pre-launch checklist.”

James Chen

Full-Stack Developer

Pricing

Start free. Upgrade when you're ready.

One URL. Full clarity. Pick the plan that fits.

Free

Explore any site

5 analyses / day
All 18 modules
Scores + security grades
Permanent reports

Start free

2 months free

Solo

Track one site

$7.5/mo

Billed yearly

Lock one domain
AI insights
Re-analysis + history
Export PDF/JSON

Lock my site

Frequently asked questions.

StackOptic is a comprehensive website analysis platform. It runs 18 specialised modules — technology detection, Core Web Vitals, security, SEO, GEO (AI search readiness), local SEO, accessibility, email infrastructure, carbon footprint and more — against any public URL and produces a single shareable report in seconds.

Wappalyzer and BuiltWith only detect the technology stack. StackOptic does that too (with 7,000+ signatures and version detection from a real browser), plus security grading, Core Web Vitals, SEO audit, AI & GEO readiness, local SEO, email infrastructure, accessibility and carbon footprint — all in one report. No other tool covers AI/GEO and local SEO.

GEO is the practice of optimising a website so AI search engines — ChatGPT, Perplexity, Claude, Google AI Overviews — can find, understand and cite it. Our GEO module audits AI bot access (8 major bots), validates llms.txt and llms-full.txt files, scores machine readability and citation readiness, and checks structured data quality.

llms.txt is an emerging standard that tells AI crawlers which pages to prioritise and how to read them. Our validator checks the file exists and parses correctly, confirms proper heading/blockquote/URL structure, detects llms-full.txt extensions and scores token efficiency for LLM consumption.

Yes. The free plan includes 5 analyses per day, 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.

Yes. StackOptic uses a real browser engine that loads pages exactly like a human visitor — executing JavaScript, rendering CSS, handling redirects. This bypasses Cloudflare, LiteSpeed, Sucuri and other bot protection systems where HTTP-only crawlers fail.

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. Confidence scores are shown alongside every detection.

StackOptic only stores publicly available information that any visitor would see — HTML, HTTP headers, DNS records, screenshots. We do not access private data, log in to websites or perform any intrusive testing. All analysis is performed on publicly accessible URLs.

Yes. The Agency plan ($79/mo yearly) includes white-label reports — your branding, your client-facing URLs. Bulk analysis, REST API, webhooks and 5 team seats are included.

Yes. Our local SEO module checks NAP (name/address/phone) consistency, local schema markup, Google Business signals and local search readiness. Essential for multi-location brands and agencies serving local businesses.

Your next audit is one URL away.

Free. Instant. Shareable. Upgrade only when you're ready.

or start with a sample report

Every layer of yourwebsite, analysed.

See exactly what a report looks like.

Everything you need to know about any website.

Technology detection

Core Web Vitals

Security audit

SEO & structured data

AI & GEO readiness

Local SEO

Email infrastructure

Accessibility

Carbon footprint

Privacy & compliance

Domain intelligence

Historical tracking

The only tool that sees the whole website.

From URL to report in seconds.

Paste any URL

18 modules run in parallel

Get a permanent, shareable report

Built for people who work with websites.

Not just data. Answers.

Trusted by web professionals.

Start free. Upgrade when you're ready.

Frequently asked questions.

Your next audit is one URL away.

Every layer of your
website, analysed.

Everything you need to know
about any website.

The only tool that sees
the whole website.

From URL to report
in seconds.

Built for people who
work with websites.