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

sapo.pt

https://sapo.pt· First analyzed 12 Feb 2026· Updated 12 Feb 2026

Export

sapo.pt

Mobile

Sponsored

Hosting Provider

PT Comunicacoes S.A

IP Address

213.13.145.114

Server Location

🇵🇹 Vila Nova de Gaia, Portugal

ASN

AS3243

Organization

PT Comunicacoes S.A

CDN

Nameservers

ns2.sapo.pt.dns01.sapo.pt.dns02.sapo.pt.ns.sapo.pt.

Performance

Page Speed

911 KB

250 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Headless

⚙️ SSR

Decoupled

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

PT Comunicacoes S.A

CDN

Detected API Sources

https://cdn.id5-sync.com/api/1...

Technology Stack

9 Technologies Detected

Advertising

Frameworks

Meta Frameworks

CSS Frameworks

Fonts

Analytics

Tag Managers

Email Marketing

SEO Analysis

A+90/100

sapo.ptsapo.pt

SAPO – Última Hora e Notícias de Hoje atualizadas ao minuto

Notícias, Atualidade, Nacional, Internacional, Local, Economia, Tecnologia, Opinião, Desporto, Cultura, Lifestyle, Signos, Jornais, Mail, Tempo e mais

Title Length59 chars

Recommended: 50-60 chars

Description Length150 chars

Recommended: 120-160 chars

Issues (0)

1 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

14 URLs

robots.txt

108 rules

Sitemap reference found

Allows all crawlers

Sponsored

Security Score

86%Very Good

Interactive

HTTPS

No WAF

268d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

21.10.2025

Valid Until

07.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.sapo.ptsapo.pt

SHA-256 Fingerprint

2B:64:A6:56:E7:BD:0F:F2:E9:E8:DE:22:20:60:9C:8E:4A:34:C5:7E...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-headers

Content-Type

access-control-allow-methods

GET, OPTIONS

content-encoding

📦 Gzip(gzip)

content-security-policy

default-src https: blob: ; script-src https: blob: 'unsafe-i...

content-type

text/html; charset=utf-8

date

Thu, 12 Feb 2026 15:56:40 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

mx.sapo.pt

Domain Information

sapo.pt

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

Typography & Readability

Roboto Flex + system-ui

69/100

Readability

/30

40/40

16px · LH 1.50

Hierarchy

/20

8/25

1x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Roboto Flex

Sans16px

Body Font

system-ui

Sans16px

Contrast Ratio

Reading Comfort

~37 CPL

Needs attention

16px

120px

24px

16px

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

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

✅ 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.

GGoogle Fonts

Business & Marketing Stack

5 Tools Detected

Enterprise

Marketing Automation

MailchimpSMB

Email marketing and automation platforms

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

CriteoEnterprise

Ad platforms and retargeting pixels

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(5)cdn.id5-sync.com(2)cmp.inmobi.com(2)js.sapo.pt(2)pub.doubleverify.com(2)

Website Identity

Facebook X (Twitter)Instagram LinkedIn TikTok Telegram

Sponsored

Last analyzed: 12 Feb 2026 at 15:56

Historical Analysis & Change Tracking