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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kvk.nl

https://kvk.nl· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

kvk.nl

Sponsored

Hosting Provider

IS Managed Customers

IP Address

82.201.39.186

Server Location

🇳🇱 Rotterdam, Netherlands

ASN

AS15879

Organization

IS Managed Customers

Nameservers

ns0.rijksoverheidnl.com.ns1.rijksoverheidnl.nl.ns2.rijksoverheidnl.eu.ns3.rijksoverheidnl.org.

Performance

Page Speed

1.1 MB

75 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

JAMstack

⚙️ SSR

Decoupled

Frontend

Framework

Next.js

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

IS Managed Customers

Detected API Sources

https://prod3-live-chat.sprink...

Technology Stack

5 Technologies Detected

Analytics

Meta Frameworks

CSS Frameworks

Tag Managers

SEO Analysis

B76/100

kvk.nlkvk.nl

KVK - Kamer van Koophandel | KVK

KVK biedt informatie, voorlichting en ondersteuning aan ondernemers. Betrouwbaar advies en praktische tools voor het starten en runnen van je bedrijf.

Title Length32 chars

Recommended: 50-60 chars

Description Length150 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (22/23)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

11 URLs

robots.txt

29 rules

Sitemap reference found

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Security Score

81%Very Good

Interactive

HTTPS

No WAF

63d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Ireland Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

22.04.2025

Valid Until

21.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (4)

www.kvk.nlkvk.nlweb-api.kvk.nlstatic.kvk.nl

SHA-256 Fingerprint

82:84:CE:51:A6:66:81:26:B6:76:3C:E8:AD:0B:23:C9:C3:64:06:29...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟣 Private(private)

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-security-policy

default-src 'self' https:; object-src 'self'; frame-src 'sel...

content-type

text/html; charset=utf-8

date

Tue, 17 Feb 2026 10:03:42 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

kvk-nl.b-v1.mx.microsoft

Domain Information

kvk.nl

Domain Age

30 years

Created

06.02.1996

Last Updated

25.01.2023

Registrar

Rijksoverheid

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Data Protection Officer mentioned

Typography & Readability

Ciutadella + Roboto

75/100

Readability

/30

40/40

18px · LH 1.67

Hierarchy

/20

25/25

2.67x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Ciutadella

Sans48px

Body Font

Roboto

Sans18px

Contrast Ratio

Reading Comfort

~35 CPL

Needs attention

48px

22px

17px

16px

18px

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

✅ Optimal line spacing: 1.67 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.7x larger than body text.

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

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

⚠️ Risky: Text appears on background images without overlay protection.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

25 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(18)googletagmanager.com(2)

Website Identity

Facebook X (Twitter)Instagram LinkedIn YouTube Threads

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Last analyzed: 17 Feb 2026 at 10:01

Historical Analysis & Change Tracking