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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flyfrontier.com

https://flyfrontier.com· First analyzed 20 Feb 2026· Updated 20 Feb 2026

Export

flyfrontier.com

Sponsored

Hosting Provider

Fastly, Inc.

IP Address

151.101.1.91

Server Location

🇨🇦 Montreal, Canada

ASN

AS54113

Organization

Fastly, Inc.

CDN

Fastly

Nameservers

authns2.qwest.net.authns1.qwest.net.

Performance

Page Speed

662 KB

185 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Umbraco

Technology Stack

13 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel FullStory

Advertising

Google Ads TikTok Pixel

Libraries

CSS Frameworks

Icon Libraries

Fonts

Tag Managers

Email Marketing

Popups & Forms

SEO Analysis

D47/100

flyfrontier.comflyfrontier.com

Low Fares Done Right | Frontier Airlines

As Home of Low Fares Done Right, find great deals and cheap flights to destinations all over North America.

Title Length40 chars

Recommended: 50-60 chars

Description Length108 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag - every page should have one H1
• Many images missing alt text (44/70)

6 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

56 URLs

robots.txt

6 rules

Sitemap reference found

Sponsored

Security Score

75%Good

Critical / Transactional

HTTPS

No WAF

31d

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

24.03.2025

Valid Until

23.03.2026

OCSP Stapling

Enabled

Subject Alternative Names (4)

www.flyfrontier.comflyfrontier.comwww.frontierairlines.comfrontierairlines.com

SHA-256 Fingerprint

79:37:D4:5B:27:4B:BE:A4:48:67:AF:5C:6E:72:D8:B1:2C:2C:3A:9C...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

access-control-allow-headers

access-control-request-headers

arr-disable-session-affinity

true

cache-control

🟡 25s(public, max-age=25)

content-encoding

📦 Gzip(gzip)

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

mxa-004e0b01.gslb.pphosted.com

mxb-004e0b01.gslb.pphosted.com

Domain Information

flyfrontier.com

Domain Age

29y 10m

Created

26.04.1996

Expires

27.04.2026

Last Updated

16.02.2023

Registrar

Network Solutions, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Typography & Readability

Gotham SSm A + sans-serif

69/100

Readability

/30

40/40

16px · LH 1.50

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Gotham SSm A

Sans

Body Font

sans-serif

Sans16px

Contrast Ratio

Reading Comfort

~39 CPL

Needs attention

24px

41px

34px

16px

Minor Second

Scale

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

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

✅ Protected text on images: Using gradient for readability.

⚠️ Cramped layout: 21 elements lack adequate spacing.

GGoogle Fonts Buy on MyFonts

Business & Marketing Stack

7 Tools Detected

Enterprise

Behavior Analytics

FullStoryEnterprise

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Pinterest AdsMid-Market

TikTok PixelMid-Market

Reddit PixelMid-Market

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

analytics.tiktok.com(4)edge.fullstory.com(2)frontierairlinesflyfrontiercom.mpeasylink.com(2)s.pinimg.com(2)googletagmanager.com(2)

Website Identity

Facebook X (Twitter)Instagram LinkedIn YouTube TikTok Pinterest Threads

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Last analyzed: 20 Feb 2026 at 13:25

Historical Analysis & Change Tracking