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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ul.pt

https://ul.pt· First analyzed 20 Feb 2026· Updated 20 Feb 2026

Export

ul.pt

Sponsored

Hosting Provider

Universidade de Lisboa

IP Address

194.117.3.27

Server Location

🇵🇹 Lisbon, Portugal

ASN

AS1930

Organization

Universidade de Lisboa

Server

Apache

Nameservers

a.ul.pt.b.ul.pt.

Performance

Page Speed

13.3 MB

86 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Drupal

Technology Stack

8 Technologies Detected

CSS Frameworks

Analytics

Libraries

UI Components

Icon Libraries

Web Servers

SEO Analysis

C64/100

ul.ptul.pt

Universidade de Lisboa

A maior universidade portuguesa e uma das maiores da Europa. No coração da cidade de Lisboa, oferecemos uma das melhores e mais diversificadas ofertas format...

Description truncated.

Title Length22 chars

Recommended: 50-60 chars

Description Length217 chars

Recommended: 120-160 chars

Issues (0)

5 issues found

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Crawlability

Sitemap

robots.txt

53 rules

Sponsored

Security Score

31%Critical

Interactive

HTTPS

No WAF

246d

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

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

24.10.2025

Valid Until

24.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

ulisboa.pt*.ulisboa.pt

SHA-256 Fingerprint

9B:7A:9F:D1:A0:00:83:10:24:10:FC:45:B3:CE:9A:69:79:96:8D:7C...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

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

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

content-language

pt-pt

date

Thu, 19 Feb 2026 19:19:53 GMT

expires

Sun, 19 Nov 1978 05:00:00 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (4)

mx22.ulisboa.pt

mx24.ulisboa.pt

mx23.ulisboa.pt

mx21.ulisboa.pt

Domain Information

ul.pt

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

Typography & Readability

Impact + Helvetica Neue

79/100

Readability

/30

40/40

16px · LH 1.50

Hierarchy

/20

18/25

3x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Impact

Display48px

Body Font

Helvetica Neue

Sans16px

Contrast Ratio

Reading Comfort

~42 CPL

Needs attention

48px

32px

60px

16px

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 3.0x larger than body text.

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

✅ Protected text on images: Using gradient for readability.

⚠️ Cramped layout: 46 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

Google Tag ManagerFree

User behavior and product analytics

Sponsored

Scripts & Styles

23 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(15)googletagmanager.com(2)static.addtoany.com(2)google-analytics.com(1)

Website Identity

Facebook Instagram Threads

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Last analyzed: 20 Feb 2026 at 07:25

Historical Analysis & Change Tracking