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.

Back to Search

arsys.es

https://arsys.es· First analyzed 15 Feb 2026· Updated 15 Feb 2026

Export

arsys.es

Mobile

Sponsored

Hosting Provider

arsys.es

IP Address

217.76.128.28

Server Location

🇪🇸 Logroño, Spain

ASN

AS8560

Server

Apache

Nameservers

ns-arsys.ui-dns.es.ns-arsys.ui-dns.com.ns-arsys.ui-dns.org.ns-arsys.ui-dns.biz.

Performance

Page Speed

679 KB

42 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

PrestaShop

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

5 Technologies Detected

Analytics

CSS Frameworks

Tag Managers

Web Servers

SEO Analysis

A+96/100

arsys.esarsys.es

Arsys - Comprar dominio y hosting

Registra tu dominio y contrata tu hosting con Arsys. Con nuestros servidores localizados en España, aseguras tu presencia en internet.

Title Length33 chars

Recommended: 50-60 chars

Description Length134 chars

Recommended: 120-160 chars

Sponsored

Security Score

86%Very Good

Interactive

HTTPS

WAF

256d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

QuoVadis Trustlink B.V.

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

30.10.2025

Valid Until

29.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.arsys.esarsys.es

SHA-256 Fingerprint

14:4F:D2:31:5B:29:42:F4:91:D2:4F:95:B1:D2:B2:1E:ED:96:C1:1F...

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

cache-control

🟡 2 Hours(max-age=7200, private, must-revalidate)

content-encoding

📦 Gzip(gzip)

content-language

content-security-policy

frame-ancestors 'self'; default-src 'unsafe-inline' 'unsafe-...

content-type

text/html; charset=utf-8

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

llsk489-a90.servidoresdns.net

llsk488-a90.servidoresdns.net

Domain Information

arsys.es

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

Typography & Readability

OpenSans

78/100

Readability

/30

40/40

16px · LH 1.50

Hierarchy

/20

15/25

1.12x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

OpenSans

Sans18px

Body Font

OpenSans

Sans16px

Contrast Ratio

Reading Comfort

~37 CPL

Needs attention

18px

16px

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

✅ Good performance: Using 1 font families keeps load times fast.

✅ Consistent design: Single font family with weight variations is a modern best practice.

⚠️ Cramped layout: 13 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Microsoft AdsEnterprise

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

11 Resources

Scripts

Styles

Async

Defer

Top Script Sources

frontend-services.ionos.com(4)local(4)js.go2sdk.com(1)apps.mypurecloud.de(1)shop.arsys.es(1)

Website Identity

Facebook LinkedIn YouTube

Sponsored

Last analyzed: 15 Feb 2026 at 06:28

Historical Analysis & Change Tracking