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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usal.es

https://usal.es· First analyzed 14 Feb 2026· Updated 14 Feb 2026

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usal.es

Mobile

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Hosting Provider

Universidad de Salamanca

IP Address

212.128.131.17

Server Location

🇪🇸 Salamanca, Spain

ASN

AS766

Organization

Universidad de Salamanca

Server

Apache

Nameservers

chico.rediris.es.zafiro.usal.es.topacio.usal.es.sun.rediris.es.+1 more

Performance

Page Speed

8.1 MB

109 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

jQuery

Styling

Bootstrap

CMS

Drupal

Infrastructure

Hosting

Universidad de Salamanca

Technology Stack

12 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel Segment

Libraries

CSS Frameworks

UI Components

Icon Libraries

Tag Managers

Web Servers

SEO Analysis

D41/100

usal.esusal.es

Universidad de Salamanca | Universidad de Salamanca

No description available for this page.

Title Length51 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

• Missing meta description - important for click-through rates
• Missing H1 tag - every page should have one H1
• Many images missing alt text (33/34)

6 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

1420 rules

Sitemap reference found

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Security Score

88%Very Good

Static / Informational

HTTPS

No WAF

263d

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

04.11.2025

Valid Until

04.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.usal.esusal.es

SHA-256 Fingerprint

3A:5A:65:00:8A:0E:C4:06:96:CB:58:1C:1C:96:DD:20:39:5A:ED:14...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-cache, must-revalidate)

content-encoding

📦 Gzip(gzip)

content-language

content-length

20567

content-type

text/html; charset=utf-8

date

Sat, 14 Feb 2026 01:42:14 GMT

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (5)

ASPMX.L.GOOGLE.COM

ALT2.ASPMX.L.GOOGLE.COM

ALT1.ASPMX.L.GOOGLE.COM

ALT3.ASPMX.L.GOOGLE.COM

+1 more

Domain Information

usal.es

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

Typography & Readability

Lato + sans-serif

54/100

Readability

/30

20/40

12px · LH 1.40

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Lato

Sans

Body Font

sans-serif

Sans12px

Contrast Ratio

Reading Comfort

~78 CPL

Optimal (45–75)

24px

12px

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

✅ Optimal line spacing: 1.40 ratio ensures comfortable reading.

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

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

✅ Protected text on images: Using text-shadow for readability.

✅ Optimal line length: ~78 characters per line is comfortable to read.

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

26 Resources

Scripts

Styles

Async

Defer

Top Script Sources

usal.es(17)googletagmanager.com(2)google-analytics.com(1)

Website Identity

Facebook X (Twitter)Instagram YouTube TikTok Bluesky

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Last analyzed: 14 Feb 2026 at 01:42

Historical Analysis & Change Tracking