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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ionos.es

https://ionos.es· First analyzed 18 Feb 2026· Updated 18 Feb 2026

Export

ionos.es

Sponsored

Hosting Provider

IONOS (1&1)

ionos.com

IP Address

217.160.86.49

Server Location

🇩🇪 Karlsruhe, Germany

ASN

AS8560

Organization

Ionos Inf

Server

Apache

Nameservers

ns-1and1.ui-dns.org.ns-1and1.ui-dns.de.ns-1and1.ui-dns.biz.ns-1and1.ui-dns.com.

Performance

Page Speed

779 KB

135 requests

Image Optimization

Lazy LoadAVIF

0–49

50–89

90–100

Architecture Stack

Hybrid

⚡ SSG

Frontend

Framework

Next.js

Styling

Tailwind CSS

CMS

PrestaShop

Infrastructure

Hosting

IONOS (1&1)

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

7 Technologies Detected

Frameworks

Meta Frameworks

CSS Frameworks

Analytics

Reviews

Web Servers

Customer Support

SEO Analysis

A82/100

ionos.esionos.es

IONOS » E-mail, dominios y páginas web

IONOS » E-mail, dominios y páginas web. El proveeder de hosting más grande de Europa y especialista en soluciones de cloud.

Title Length38 chars

Recommended: 50-60 chars

Description Length123 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (125/182)

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

480 URLs

robots.txt

18 rules

Sitemap reference found

Sponsored

Security Score

56%Poor

Interactive

HTTPS

No WAF

181d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

18.08.2025

Valid Until

18.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (20)

ionos.es1and1.esalta.1and1.esbap.ionos.esbs.ionos.esdeploy-now.esdeploynow.esinstantweb.1and1.es+12 more

SHA-256 Fingerprint

A9:14:0F:BB:6C:9A:33:99:DE:11:A0:8C:AD:59:BA:B6:A5:2A:26:61...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

cache-control

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

content-encoding

📦 Gzip(gzip)

content-security-policy

frame-ancestors 'self'

content-type

text/html

date

Wed, 18 Feb 2026 06:57:20 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

mxint02.1and1.com

mxint01.1and1.com

Domain Information

ionos.es

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

Data Protection Officer mentioned

Typography & Readability

Overpass Regular + Open Sans Regular

50/100

Readability

/30

12/40

12px · LH 1.33

Hierarchy

/20

18/25

3.33x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

10/20

3 fonts

Heading Font

Overpass Regular

Sans40px

Body Font

Open Sans Regular

Sans12px

Contrast Ratio

Reading Comfort

~38 CPL

Needs attention

40px

48px

32px

12px

❌ Critical: 12px body text is too small. Increase to at least 14px.

✅ Strong hierarchy: Headlines are 3.3x larger than body text.

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

✅ Protected text on images: Using gradient for readability.

⚠️ Cramped layout: 26 elements lack adequate spacing.

✅ Clean layout: Consistent left alignment throughout.

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

28 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(15)frontend-services.ionos.com(4)v0v7kq.ionos.es(1)

Website Identity

Facebook Instagram YouTube TikTok

Sponsored

Last analyzed: 18 Feb 2026 at 06:57

Historical Analysis & Change Tracking