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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southwest.com

https://southwest.com· First analyzed 13 Feb 2026· Updated 13 Feb 2026

Export

southwest.com

Mobile

Sponsored

Hosting Provider

Unitas Global

IP Address

66.150.1.229

Server Location

🇺🇸 Carrollton, United States

ASN

AS396173

Organization

Unitas Global

CDN

Akamai

WAF

Akamai

Nameservers

ns-sdc.southwest.com.ns-w11.southwest.com.

Performance

Page Speed

1.7 MB

81 requests

Image Optimization

Responsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Unitas Global

CDN

Akamai

Technology Stack

3 Technologies Detected

Meta Frameworks

Astro

CSS Frameworks

Tailwind CSS

Analytics

Google Analytics

SEO Analysis

B70/100

southwest.comsouthwest.com

Southwest Airlines | Airline Tickets and Low Fares

Find low fares to top destinations and plan your travel today. Book Southwest flights, rental cars, and hotels on southwest.com.

Title Length50 chars

Recommended: 50-60 chars

Description Length128 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag - every page should have one H1

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

87 rules

Sitemap reference found

Sponsored

Security Score

71%Good

Interactive

HTTPS

WAF

155d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

14.11.2025

Valid Until

18.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (15)

www.southwest.comalice.southwest.comcareers.southwest.comchris.southwest.comglobal.southwest.commobile-offline.southwest.commobile.southwest.comnonrev.southwest.com+7 more

SHA-256 Fingerprint

9E:79:9A:05:28:46:30:88:82:AD:31:61:4B:C1:C6:8E:24:6B:C9:B1...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

akamai-request-bc

[a=2.17.44.4,b=603404310,c=g,n=DE_HE_FRANKFURT,o=20940]

cache-control

🔴 No Cache(max-age=0, no-cache, no-store)

content-encoding

⚡ Brotli(br)

content-length

1760

content-security-policy

frame-ancestors 'self' https://mobile.southwest.com https://...

content-type

text/html

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

outgoing.wnco.com

mail02.wnco.com

Domain Information

southwest.com

Domain Age

28y 9m

Created

01.05.1997

Expires

02.05.2027

Last Updated

31.03.2025

Registrar

MarkMonitor Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Southwest Sans

43/100

Readability

/30

32/40

14px · LH 1.50

Hierarchy

/20

8/25

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Southwest Sans

Sans

Body Font

Southwest Sans

Sans14px

Contrast Ratio

Reading Comfort

~41 CPL

Needs attention

36px

14px

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ 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: 7 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Advanced

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

24 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(12)southwest.com(6)cdn.branch.io(1)cdn.cookielaw.org(1)

Website Identity

Facebook Instagram LinkedIn YouTube Pinterest

Sponsored

Last analyzed: 13 Feb 2026 at 23:21

Historical Analysis & Change Tracking