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

ubuntu.com

https://ubuntu.com· First analyzed 10 Feb 2026· Updated 10 Feb 2026

Export

ubuntu.com

Mobile

Sponsored

Hosting Provider

Canonical Group Limited

IP Address

185.125.190.29

Server Location

🇬🇧 City of London, United Kingdom

ASN

AS41231

Organization

Canonical Group Limited

Server

Nginx

Nameservers

ns2.canonical.com.ns1.canonical.com.ns3.canonical.com.

Performance

Page Speed

543 KB

57 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Canonical Group Limited

CDN

Cloudinary

Technology Stack

8 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Advertising

Google Ads Google AdSense

Other

CSS Frameworks

Tag Managers

Web Servers

SEO Analysis

B76/100

ubuntu.comubuntu.com

Enterprise Open Source and Linux | Ubuntu

Ubuntu is the modern, open source operating system on Linux for the enterprise server, desktop, cloud, and IoT.

Title Length45 chars

Recommended: 50-60 chars

Description Length124 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

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Security Score

85%Very Good

Interactive

HTTPS

No WAF

78d

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

cache-control

🟡 60s(max-age=60, stale-while-revalidate=86400, stale-if-error=300)

content-encoding

zstd

content-length

34099

content-security-policy

default-src 'self'; img-src data: blob: *; script-src-elem '...

content-type

text/html; charset=utf-8

Good Warning Issue

Typography & Readability

Ubuntu

64/100

Readability

/30

40/40

18px · LH 1.50

Hierarchy

/20

21/25

2.5x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Ubuntu

Sans45px

Body Font

Ubuntu

Sans18px

Contrast Ratio

Reading Comfort

~37 CPL

Needs attention

45px

18px

27px

18px

✅ Excellent readability: 18px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.5x 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.

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Business & Marketing Stack

3 Tools Detected

Enterprise

Marketing Automation

MarketoEnterprise

Email marketing and automation platforms

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

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Scripts & Styles

19 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(9)local(6)assets.ubuntu.com(1)

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Last analyzed: 10 Feb 2026 at 21:18

Historical Analysis & Change Tracking