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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diariovasco.com

https://diariovasco.com· First analyzed 20 Feb 2026· Updated 20 Feb 2026

Export

diariovasco.com

Sponsored

Hosting Provider

Fastly, Inc.

IP Address

151.101.3.42

Server Location

🇨🇦 Montreal, Canada

ASN

AS54113

Organization

Fastly, Inc.

CDN

Nameservers

ns-cloud-a3.googledomains.com.ns-cloud-a1.googledomains.com.ns-cloud-a4.googledomains.com.ns-cloud-a2.googledomains.com.

Performance

Page Speed

229 KB

159 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

React

CMS

WordPress

Infrastructure

Hosting

Fastly, Inc.

CDN

Technology Stack

7 Technologies Detected

Frameworks

Meta Frameworks

Libraries

CSS Frameworks

Analytics

Customer Support

Plugins

SEO Analysis

B70/100

diariovasco.comdiariovasco.com

El Diario Vasco - Noticias de Donostia, San Sebastián y Gipuzkoa

Noticias y última hora de Donostia-San Sebastián, Gipuzkoa y todas sus comarcas y municipios en El Diario Vasco

Title Length64 chars

Recommended: 50-60 chars

Description Length111 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag - every page should have one H1

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

491 URLs

robots.txt

83 rules

Sponsored

Security Score

46%Poor

Interactive

HTTPS

No WAF

17d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Certainly

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

07.02.2026

Valid Until

09.03.2026

Subject Alternative Names (2)

*.diariovasco.comdiariovasco.com

SHA-256 Fingerprint

98:38:7C:04:C7:5D:74:8D:0D:5F:0D:C7:65:3A:60:41:1D:64:E5:76...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

age

alt-svc

h3=":443";ma=86400,h3-29=":443";ma=86400,h3-27=":443";ma=864...

cache-control

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

content-encoding

📦 Gzip(gzip)

content-length

122582

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (5)

alt3.aspmx.l.google.com

alt1.aspmx.l.google.com

aspmx.l.google.com

alt4.aspmx.l.google.com

+1 more

Domain Information

diariovasco.com

Domain Age

28y 12m

Created

28.02.1997

Expires

01.03.2027

Last Updated

15.02.2026

Registrar

Interdominios, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Didomi

Cookie Consent Banner

Didomi

GDPR Indicators

Cookie consent banner detected

CMP: Didomi

Data Protection Officer mentioned

Typography & Readability

Guardian TextSans Regular + Basier Square Regular

43/100

Readability

/30

12/40

13px · LH 1.23

Hierarchy

/20

8/25

1.08x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Guardian TextSans Regular

Sans14px

Body Font

Basier Square Regular

Sans13px

Contrast Ratio

Reading Comfort

~41 CPL

Needs attention

14px

34px

24px

13px

Golden Ratio

Scale

❌ Critical: 13px body text is too small. Increase to at least 14px.

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

✅ Good performance: Using 2 font families keeps load times fast.

✅ Protected text on images: Using gradient for readability.

⚠️ Cramped layout: 509 elements lack adequate spacing.

✅ Clean layout: Consistent left alignment throughout.

Buy on MyFonts

Business & Marketing Stack

5 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Social Media

Facebook SDKFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

21 Resources

Scripts

Styles

Async

Defer

Top Script Sources

assets.adobedtm.com(11)sdk.privacy-center.org(2)static.vocstatic.com(2)spixel.socy.es(1)es-config.sensic.net(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn TikTok

Sponsored

Last analyzed: 20 Feb 2026 at 08:06

Historical Analysis & Change Tracking