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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fender.com

https://fender.com· First analyzed 16 Feb 2026· Updated 16 Feb 2026

Export

fender.com

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

44.207.185.127

Server Location

🇺🇸 Ashburn, United States

ASN

AS14618

Organization

AWS EC2 (us-east-1)

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns-155.awsdns-19.com.ns-2010.awsdns-59.co.uk.ns-698.awsdns-23.net.ns-1234.awsdns-26.org.

Performance

Page Speed

2 MB

217 requests

Image Optimization

Responsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Shopify

ecommerce

FENDER EMEA - PROD - dup_stg_02_11_26_03

Shopify Theme

Detected Apps

Upsell & Cross SellInstagram ShoppingTikTok

Technology Stack

13 Technologies Detected

Frameworks

Analytics

UI Components

Other

CSS Frameworks

Fonts

Tag Managers

Advertising

CDN

Customer Support

Security

SEO Analysis

C64/100

fender.comfender.com

Fender Guitars | Electric, Acoustic & Bass Guitars, Amps, Pro Audio

Fender is the world’s foremost manufacturer of electric and acoustic guitars, basses, amplifiers, accessories, apparel and more; known worldwide for Stratoca...

Description truncated.

Title Length67 chars

Recommended: 50-60 chars

Description Length213 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag - every page should have one H1

4 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

162 rules

Sitemap reference found

Sponsored

Security Score

81%Very Good

Interactive

HTTPS

WAF

82d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

08.02.2026

Valid Until

09.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

fi.fender.com

SHA-256 Fingerprint

15:F1:09:FF:C4:20:11:CB:21:73:29:2A:0D:7C:D7:8C:14:8A:5A:EC...

Upgrade to view header details

HTTP Headers

Developer Console

alt-svc

clear

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9cede62cbbdf8e2c-FRA

content-encoding

📦 Gzip(gzip)

content-language

en-IO

content-security-policy

block-all-mixed-content; frame-ancestors 'none'; upgrade-ins...

Good Warning Issue

Email Infrastructure

Mimecast

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

us-smtp-inbound-1.mimecast.com

us-smtp-inbound-2.mimecast.com

Domain Information

fender.com

Domain Age

31y 1m

Created

20.01.1995

Expires

21.01.2027

Last Updated

17.01.2025

Registrar

CSC Corporate Domains, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Osano

Cookie Consent Banner

Osano

GDPR Indicators

Cookie consent banner detected

CMP: Osano

Data Protection Officer mentioned

Typography & Readability

Futura + Helvetica

63/100

Readability

/30

32/40

16px · LH 1.25

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

10/20

3 fonts

Heading Font

Futura

Sans

Body Font

Helvetica

Sans16px

Contrast Ratio

Reading Comfort

Dual Sans-Serif

left aligned

24px

14px

16px

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

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

GGoogle Fonts Buy on MyFonts

Business & Marketing Stack

5 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

SegmentEnterprise

Google AnalyticsFree

ContentsquareEnterprise

User behavior and product analytics

Privacy & Cookies

OsanoMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

fi.fender.com(12)cdn.segment.com(2)static.rechargecdn.com(1)googletagmanager.com(1)cmp.osano.com(1)

Website Identity

Facebook X (Twitter)Instagram YouTube TikTok

Sponsored

Last analyzed: 16 Feb 2026 at 14:58

Historical Analysis & Change Tracking