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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ucm.es

https://ucm.es· First analyzed 12 Feb 2026· Updated 12 Feb 2026

Export

ucm.es

Mobile

Sponsored

Hosting Provider

UCM

IP Address

147.96.2.159

Server Location

🇪🇸 Madrid, Spain

ASN

AS766

Organization

UCM

Server

Apache

Nameservers

ucdns.sis.ucm.es.crispin.sim.ucm.es.sun.rediris.es.chico.rediris.es.

Performance

Page Speed

654 KB

66 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

jQuery

Styling

Bootstrap

Infrastructure

Hosting

UCM

Technology Stack

7 Technologies Detected

CSS Frameworks

Analytics

Libraries

Icon Libraries

Web Servers

SEO Analysis

C64/100

ucm.esucm.es

Universidad Complutense de Madrid

La mayor universidad presencial de España, con la mejor oferta educativa. En Madrid, rodeada de zonas verdes y con una intensa vida cultural y deportiva.

Title Length33 chars

Recommended: 50-60 chars

Description Length153 chars

Recommended: 120-160 chars

Issues (0)

5 issues found

Upgrade to view details

Sponsored

Security Score

36%Critical

Interactive

HTTPS

No WAF

294d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

04.12.2025

Valid Until

04.12.2026

OCSP Stapling

Enabled

Subject Alternative Names (20)

ucm.es*.sis.ucm.es*.containers.fdi.ucm.es*.igeo.ucm.es*.trs.ucm.es*.psi.ucm.es*.visavet.ucm.es*.rect.ucm.es+12 more

SHA-256 Fingerprint

C4:60:6B:B5:73:BB:E7:98:10:93:4B:A4:3C:61:CC:CE:00:E2:1B:13...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate)

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Thu, 12 Feb 2026 23:52:04 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (5)

alt1.aspmx.l.google.com

aspmx.l.google.com

alt2.aspmx.l.google.com

aspmx3.googlemail.com

+1 more

Domain Information

ucm.es

DNSSEC

Not Enabled

Privacy & Compliance

Didomi

Cookie Consent Banner

Didomi

GDPR Indicators

Cookie consent banner detected

CMP: Didomi

Typography & Readability

Roboto + Arial

83/100

Readability

/30

32/40

15px · LH 1.60

Hierarchy

/20

21/25

2.67x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Roboto

Sans40px

Body Font

Arial

Sans15px

Contrast Ratio

Reading Comfort

~47 CPL

Optimal (45–75)

40px

28px

18px

15px

⚠️ Small text: 15px may be hard to read on mobile. Consider 16px+.

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

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

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

✅ Optimal line length: ~47 characters per line is comfortable to read.

⚠️ Cramped layout: 38 elements lack adequate spacing.

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google AnalyticsFree

Google Tag ManagerFree

User behavior and product analytics

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

17 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(4)googletagmanager.com(3)sdk.privacy-center.org(2)

Website Identity

Facebook X (Twitter)Instagram LinkedIn TikTok Bluesky

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Last analyzed: 12 Feb 2026 at 23:52

Historical Analysis & Change Tracking