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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lavanguardia.com

https://lavanguardia.com· First analyzed 11 Feb 2026· Updated 11 Feb 2026

Export

lavanguardia.com

Mobile

Sponsored

Hosting Provider

Grupo Godo De Comunicacion S.A.

IP Address

213.4.81.203

Server Location

🇪🇸 Madrid, Spain

ASN

AS3352

Organization

Grupo Godo De Comunicacion S.A.

Nameservers

a2-64.akam.net.a16-66.akam.net.a20-66.akam.net.a7-67.akam.net.+2 more

Performance

Page Speed

467 KB

60 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Grupo Godo De Comunicacion S.A.

Technology Stack

13 Technologies Detected

Analytics

Google Analytics

Facebook Pixel Segment

Advertising

Meta Frameworks

Libraries

UI Components

CSS Frameworks

Icon Libraries

Fonts

Tag Managers

Customer Support

SEO Analysis

B70/100

lavanguardia.comlavanguardia.com

Últimas noticias, actualidad y última hora en Catalunya, España y e...

Últimas noticias, actualidad, participación, servicios, entretenimiento y última hora en Catalunya, España y el mundo - LaVanguardia.com

Title truncated.

Title Length74 chars

Recommended: 50-60 chars

Description Length136 chars

Recommended: 120-160 chars

Issues (0)

4 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

383 rules

Sponsored

Security Score

31%Critical

Interactive

HTTPS

No WAF

174d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

04.02.2026

Valid Until

04.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (20)

www.grupogodo.comadi.lavanguardia.comagenda.lavanguardia.comagrupador.lavanguardia.comapi.audioteca.rac1.catapi.audioteca.rac105.cataside.lavanguardia.comaside.mundodeportivo.com+12 more

SHA-256 Fingerprint

EF:20:DA:B2:47:D6:3B:11:F9:C4:8E:D7:F7:3E:E7:8D:7F:DA:DB:AD...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

access-control-max-age

86400

cache-control

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

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Wed, 11 Feb 2026 12:43:16 GMT

expires

Wed, 11 Feb 2026 12:43:16 GMT

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

grupogodo-com.mail.protection.outlook.com

grupogodo.mail.protection.outlook.com

Privacy & Compliance

Didomi

Cookie Consent Banner

Didomi

GDPR Indicators

Cookie consent banner detected

CMP: Didomi

Typography & Readability

Source Serif 4 + LibreFranklin-Regular

55/100

Readability

/30

32/40

15px · LH 1.60

Hierarchy

/20

25/25

2.13x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

10/20

3 fonts

Heading Font

Source Serif 4

Serif32px

Body Font

LibreFranklin-Regular

Sans15px

Contrast Ratio

Reading Comfort

~39 CPL

Needs attention

32px

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 2.1x larger than body text.

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

⚠️ Cramped layout: 542 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

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

28 Resources

Scripts

Styles

Async

Defer

Top Script Sources

static.lavanguardia.com(7)rsc.lavanguardia.com(4)sdk.mrf.io(2)securepubads.g.doubleclick.net(2)googletagmanager.com(1)

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Last analyzed: 11 Feb 2026 at 12:43

Historical Analysis & Change Tracking