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.

Back to Search

up.pt

https://up.pt· First analyzed 13 Feb 2026· Updated 13 Feb 2026

Export

up.pt

Mobile

Sponsored

Hosting Provider

Universidade do Porto

IP Address

193.137.55.13

Server Location

🇵🇹 Porto, Portugal

ASN

AS1930

Organization

Universidade do Porto

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns1.up.pt.ns2.up.pt.ns4.up.pt.ns02.fccn.pt.+1 more

Performance

Page Speed

6.2 MB

59 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

CMS

WordPress

Infrastructure

Hosting

Universidade do Porto

CDN

Cloudflare

Technology Stack

7 Technologies Detected

Libraries

UI Components

Other

CSS Frameworks

Icon Libraries

CDN

SEO Analysis

D58/100

up.ptup.pt

University of Porto

The University of Porto is one of the best public education institutions in Europe. It is recognised for the quality of its training and research, in science...

Description truncated.

Title Length19 chars

Recommended: 50-60 chars

Description Length194 chars

Recommended: 120-160 chars

Issues (0)

6 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

6 rules

Allows all crawlers

Sponsored

Security Score

86%Very Good

Interactive

HTTPS

WAF

85d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

08.02.2026

Valid Until

09.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.up.pt

SHA-256 Fingerprint

F3:FB:22:1C:B1:A9:C4:E6:58:B9:13:25:34:7D:B9:20:DF:4A:B0:46...

Upgrade to view header details

HTTP Headers

Developer Console

date

Fri, 13 Feb 2026 18:54:38 GMT

content-type

text/html; charset=utf-8

server

cloudflare

strict-transport-security

max-age=63072000; preload

x-frame-options

SAMEORIGIN, DENY

content-security-policy

upgrade-insecure-requests;

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (6)

mx06.up.pt

mx04.up.pt

mx03.up.pt

mx05.up.pt

+2 more

Domain Information

up.pt

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Typography & Readability

Lato + sans-serif

61/100

Readability

/30

40/40

16px · LH 1.40

Hierarchy

/20

18/25

3.2x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Lato

Sans51px

Body Font

sans-serif

Sans16px

Contrast Ratio

Reading Comfort

~59 CPL

Optimal (45–75)

51px

26px

29px

24px

16px

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

✅ Optimal line spacing: 1.40 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 3.2x larger than body text.

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

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

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

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Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

18 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(7)cdnjs.cloudflare.com(1)static.cloudflareinsights.com(1)

Website Identity

Facebook X (Twitter)Instagram YouTube

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Last analyzed: 13 Feb 2026 at 18:55

Historical Analysis & Change Tracking