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.

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acea.auto

https://acea.auto· First analyzed 25 Apr 2026· Updated 25 Apr 2026

Export

acea.auto

Mobile

Sponsored

Hosting Provider

LiteSpeed

cloud.google.com

IP Address

35.204.47.21

Site Location

🇧🇪 Brussels, Belgiumvia schema_nap

Server Location

🇳🇱 Groningen, Netherlands

ASN

AS396982

Organization

Google Cloud (europe-west4)

Server

Nginx

CDN

Proxy Cache

Nameservers

pdns2.registrar-servers.com.pdns1.registrar-servers.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

486 ms10%

Speed Index

632 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

3 MB

75 requests

Image Optimization

Responsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.9.4

cms

UnderStrapv0.9.4Custom

by Holger Koenemann

View Theme

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

14 Technologies Detected

Plugins

Acea Plugin Cookie Law Info Mailpoet

Libraries

Analytics

UI Components

CSS Frameworks

Fonts

Tag Managers

Advertising

Web Servers

SEO Analysis

A81/100

Meta Tags15/15

Content11/12

Headings3/8

Technical24/25

E-E-A-T2/7

Images2/7

Links5/5

URL5/5

Social4/5

Freshness4/4

Mobile3/4

Indexability3/3

acea.autoacea.auto

ACEA - European Automobile Manufacturers' Association

The European Automobile Manufacturers’ Association (ACEA) unites Europe’s 15 major car, truck, van and bus makers. We are the voice of the EU auto industry.

Title Length53 chars

Recommended: 50-60 chars (~323px / 580px)

Description Length156 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (39/70) — critical for accessibility and SEO

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

17 URLs

17 sub-sitemaps

robots.txt

3 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

23/100

Needs Work

6 14

Sponsored

AI & LLM Readiness

D51/100

Bot Access

20/25

Machine Read.

8/25

Schema Data

4/25

Citation

19/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

nav

Text ratio:7%

Words:1,768

Token eff.:Optimal

Sections/1K:1.1

Depth:1/5

Structured Data

1 JSON-LD

Organization×1.1WebSite(min)microdata

sameAs entity links

Citation Readiness

Opening Summary53w

Descriptive Headingsavg 8.7w

Canonical URL

Open Graph3/3

Twitter Card1/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (9)

AI readiness recommendation preview...

Upgrade to view recommendations

Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

57/100

Passed

Critical

Warnings

Images & Alt Text

10/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

9/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

5/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

14/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

15/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

4/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

4 recommendations

•Accessibility recommendation preview...

Upgrade to view recommendations

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

36/100

314 mg

CO₂e / view

3.0 MB

Page Weight

30%

Cleaner Than

New Visitor

359 mg

Returning (cached)

179 mg

Annual (10K/mo)

37.7 kg

Emission Segments

Data Center

15 mg

Network

92 mg

Device

206 mg

Resource Breakdown

JavaScript

162.1 KB

Images

2.8 MB

CSS

87.7 KB

HTML

23.2 KB

Other

9.0 KB

Green Hosting Verified

Google Cloud

GWF Verified

5 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

36%Critical

Interactive

HTTPS

No WAF

76d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

11.04.2026

Valid Until

10.07.2026

Subject Alternative Names (2)

acea.autowww.acea.auto

SHA-256 Fingerprint

14:46:E3:BD:65:BE:3D:48:F9:3E:58:93:80:82:77:D2:B3:2E:0E:A7...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=UTF-8

date

Sat, 25 Apr 2026 10:14:49 GMT

host-header

8441280b0c35cbc1147f8ba998a563a7

link

<https://www.acea.auto/wp-json/>; rel="https://api.w.org/", ...

server

nginx

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

mx1-eu.emailsecurity.app

mx2-eu.emailsecurity.app

Domain Information

acea.auto

Domain Age

5y 4m

Created

15.12.2020

Expires

15.12.2026

Last Updated

01.02.2026

Registrar

Namecheap

DNSSEC

Not Enabled

Privacy & Compliance

CookieYes

Cookie Consent Banner

CookieYes

GDPR Indicators

Cookie consent banner detected

CMP: CookieYes

Data Protection Officer mentioned

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

81/100

Mobile Friendly10 breakpoints

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width, initial-scale=1, shrink-to-fit=no

3 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Roboto Condensed

WCAG Partial

63/100

Readability

/30

26/30

18px · LH 1.50

Hierarchy

/20

7/20

WCAG

/25

17/25

2.87:1 min contrast

Performance

/25

13/25

1 font · 4 req

Heading Font

Roboto Condensed

Sans

Body Font

Roboto Condensed

Sans18px

Contrast Ratio

2.87:1

6 issues

Reading Comfort

~36 CPL

Narrow lines

38px

16px

18px

✅ Excellent readability: 18px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

⚠️ Partial contrast: 6 elements below WCAG AA threshold (min 2.9:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

✅ Lean font stack: 1 font families keeps load times fast.

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFontsFlesch 54

Color Palette

10 unique colors

3.34:1 AA Large Light

#ffffff

Primary· 35.4%

#858e92

Other· 7%

#7faea7

Secondary· 6.5%

#112530

Primary· 6.3%

#2d3b42

Secondary· 6.2%

#05070c

Primary· 5.9%

#d39483

Secondary· 3.9%

#6e6176

Secondary· 3.8%

Business & Marketing Stack

4 Tools Detected

Enterprise

Marketing Automation

MailchimpSMB

Email marketing and automation platforms

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

GDPR Cookie ConsentFree

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

24 Resources

Scripts

Styles

Async

Defer

Top Script Sources

acea.auto(10)cdn.jsdelivr.net(3)googletagmanager.com(2)cdn.addevent.com(1)

Website Identity

European Automobile Manufacturers' Association

Organization

The European Automobile Manufacturers' Association unites Europe's 17 major car, truck, van, and bus makers and represents the voice of the auto industry in the European Union.

www.acea.auto/

5 years old

Rond-Point Schuman 6, Brussels

1040, Brussels

Location detected: 🇧🇪 Belgium, Brusselsvia schema_nap

Namecheapen-GBEst. 1991

Social Profiles

X (Twitter)Instagram LinkedIn YouTube

Sponsored

Last analyzed: 25 Apr 2026 at 10:15

Historical Analysis & Change Tracking