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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fedoraproject.org

https://fedoraproject.org· First analyzed 11 Feb 2026· Updated 11 Feb 2026

Export

fedoraproject.org

Mobile

Sponsored

Hosting Provider

Red Hat, Inc

IP Address

38.145.32.20

Server Location

🇺🇸 Chandler, United States

ASN

AS21785

Organization

Red Hat, Inc

Server

Apache

Nameservers

ns03.fedoraproject.org.ns05.fedoraproject.org.ns02.fedoraproject.org.ns01.fedoraproject.org.

Performance

Page Speed

907 KB

31 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Tailwind CSS

Infrastructure

Hosting

Red Hat, Inc

Technology Stack

5 Technologies Detected

Meta Frameworks

CSS Frameworks

Icon Libraries

Web Servers

SEO Analysis

D58/100

fedoraproject.orgfedoraproject.org

Fedora Linux | The Fedora Project

An innovative platform for hardware, clouds, and containers, built with love by you.

Title Length33 chars

Recommended: 50-60 chars

Description Length84 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (17/19)

5 issues found

Upgrade to view details

Sponsored

A+

Security Score

93%Excellent

Static / Informational

HTTPS

No WAF

257d

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

apptime

D=2209

content-encoding

📦 Gzip(gzip)

content-length

24993

content-type

text/html

date

Wed, 11 Feb 2026 00:19:09 GMT

Good Warning Issue

Typography & Readability

Montserrat + Open Sans

78/100

Readability

/30

32/40

30px · LH 1.20

Hierarchy

/20

25/25

2x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Montserrat

Sans60px

Body Font

Open Sans

Sans30px

Contrast Ratio

Reading Comfort

~36 CPL

Needs attention

60px

36px

20px

30px

✅ Excellent readability: 30px body text is ideal for all devices.

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

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

✅ Protected text on images: Using gradient for readability.

⚠️ Cramped layout: 22 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

5 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(1)

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Last analyzed: 11 Feb 2026 at 00:19

Historical Analysis & Change Tracking