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

gov.br

https://www.gov.br· First analyzed 11 Feb 2026· Updated 11 Feb 2026

Export

gov.br

Mobile

Sponsored

Hosting Provider

Servico Federal De Processamento De Dados - Serpro

IP Address

161.148.164.31

Server Location

🇧🇷 Asa Norte, Brazil

ASN

AS10954

Organization

Servico Federal De Processamento De Dados - Serpro

CDN

Nameservers

a.dns.br.b.dns.br.c.dns.br.d.dns.br.+2 more

Performance

Page Speed

4 MB

92 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Servico Federal De Processamento De Dados - Serpro

CDN

Technology Stack

11 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel Matomo

Meta Frameworks

Libraries

UI Components

CSS Frameworks

Icon Libraries

Tag Managers

Advertising

SEO Analysis

B78/100

www.gov.brwww.gov.br

GOV.BR

O gov.br reúne, em um só lugar, serviços para o cidadão e informações sobre a atuação de todas as áreas do governo.

Title Length6 chars

Recommended: 50-60 chars

Description Length115 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

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Security Score

81%Very Good

Interactive

HTTPS

No WAF

152d

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

age

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

content-language

pt-br

content-length

21642

Good Warning Issue

Typography & Readability

rawline

41/100

Readability

/30

22/40

14px · LH --

Hierarchy

/20

18/25

2.57x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

rawline

Sans36px

Body Font

rawline

Sans14px

Contrast Ratio

Reading Comfort

Single Font Family

left aligned

36px

12px

14px

⚠️ Small text: 14px may be hard to read on mobile. Consider 16px+.

✅ Strong hierarchy: Headlines are 2.6x 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.

⚠️ Risky: Text appears on background images without overlay protection.

⚠️ Cramped layout: 9 elements lack adequate spacing.

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Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

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Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

gov.br(19)cdnjs.cloudflare.com(1)

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Last analyzed: 11 Feb 2026 at 06:57

Historical Analysis & Change Tracking