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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heineken.com

https://heineken.com· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

heineken.com

Sponsored

Hosting Provider

Microsoft Azure

azure.microsoft.com

IP Address

52.157.142.5

Server Location

🇳🇱 Amsterdam, Netherlands

ASN

AS8075

Organization

Microsoft Azure Cloud (westeurope)

Nameservers

dns1.cscdns.net.dns2.cscdns.net.

Performance

Page Speed

549 KB

20 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Umbraco

Technology Stack

5 Technologies Detected

Other

CSS Frameworks

Fonts

Analytics

Tag Managers

SEO Analysis

D41/100

heineken.comheineken.com

AgeGateway

No description available for this page.

Title Length10 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description - important for click-through rates
• Many images missing alt text (1/1)

5 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

70 rules

Sitemap reference found

Sponsored

Security Score

76%Good

Interactive

HTTPS

No WAF

57d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Corporation Service Company

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

16.01.2026

Valid Until

15.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (20)

san.heineken.comadmin-agegatewayservice.heineken.comagegate.theheinekencompany.comagegatewayservice.heineken.comapi-bms.heiway.comapi-portail-fournisseurs.france-boissons.frassets-emea.rewards.heineken.comb2beer.heineken.com+12 more

SHA-256 Fingerprint

AF:9A:2E:DE:03:DC:26:2A:0D:DE:D7:A9:8E:25:05:21:4A:0E:51:11...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

akamai-validation

NDhCOFpPVzYxR1dJRVJOSzY0WVpGTlk3TDM1S0tCVDNWS0wxUDFRRVMyS0pC...

cache-control

🔴 No Cache(max-age=0, no-cache, no-store)

content-encoding

📦 Gzip(gzip)

content-security-policy

script-src 'self' 'unsafe-inline' 'unsafe-eval' www.youtube....

content-type

text/html; charset=utf-8

date

Tue, 17 Feb 2026 13:32:42 GMT

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

heineken-com.mail.protection.outlook.com

Domain Information

heineken.com

Domain Age

30y 5m

Created

20.09.1995

Expires

19.09.2026

Last Updated

24.10.2025

Registrar

CSC Corporate Domains, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Data Protection Officer mentioned

Typography & Readability

HeinekenSerif18 + sans-serif

93/100

Readability

/30

40/40

18px · LH 1.80

Hierarchy

/20

25/25

2x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

HeinekenSerif18

Serif36px

Body Font

sans-serif

Sans18px

Contrast Ratio

Reading Comfort

Serif Headlines + Sans Body

center aligned

36px

18px

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

✅ Optimal line spacing: 1.80 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

✅ Good performance: Using 2 font families keeps load times fast.

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

✅ Protected text on images: Using gradient for readability.

Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

7 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(2)cdn.cookielaw.org(1)js.monitor.azure.com(1)local(1)

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Last analyzed: 17 Feb 2026 at 13:32

Historical Analysis & Change Tracking