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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wholefoodsmarket.com

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

Export

Mobile

Sponsored

Hosting Provider

Fastly, Inc.

IP Address

151.101.0.69

Server Location

🇨🇦 Montreal, Canada

ASN

AS54113

Organization

Fastly, Inc.

Server

Squarespace

Nameservers

ns-278.awsdns-34.com.ns-976.awsdns-58.net.ns-1263.awsdns-29.org.ns-1964.awsdns-53.co.uk.

Performance

Page Speed

1.8 MB

52 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Squarespace

website_builder

Technology Stack

5 Technologies Detected

Frameworks

Alpine.js

Other

Chart.js

CSS Frameworks

Tailwind CSS

Fonts

Adobe Fonts (Typekit)

Security

reCAPTCHA

SEO Analysis

C61/100

wholefoodsmarket.comwholefoodsmarket.com

Whole Foods Market UK

Get hungry for local, organic, plant-based & more. Browse products, find recipes. Get delivery, pick up & order catering.

Title Length21 chars

Recommended: 50-60 chars

Description Length122 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag - every page should have one H1
• Many images missing alt text (9/16)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

59 rules

Sitemap reference found

Sponsored

Security Score

56%Poor

Interactive

HTTPS

No WAF

84d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

08.02.2026

Valid Until

09.05.2026

Subject Alternative Names (1)

www.wholefoodsmarket.co.uk

SHA-256 Fingerprint

6B:02:37:AB:C8:AD:D1:9F:19:8C:98:0D:D3:41:8E:7D:FD:67:D5:DB...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

age

180598

content-encoding

📦 Gzip(gzip)

content-length

35831

content-type

text/html;charset=utf-8

date

Wed, 11 Feb 2026 11:22:13 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

mxb-004a4e02.gslb.pphosted.com

mxa-004a4e02.gslb.pphosted.com

Domain Information

wholefoodsmarket.com

Domain Age

26y 9m

Created

10.05.1999

Expires

10.05.2026

Last Updated

05.05.2025

Registrar

Nom-iq Ltd. dba COM LAUDE

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Typography & Readability

Circular Md + Circular Book

68/100

Readability

/30

40/40

21px · LH 1.50

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

10/20

3 fonts

Heading Font

Circular Md

Sans

Body Font

Circular Book

Sans21px

Contrast Ratio

Reading Comfort

~36 CPL

Needs attention

51px

39px

21px

✅ Excellent readability: 21px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

⚠️ Cramped layout: 17 elements lack adequate spacing.

✅ Clean layout: Consistent left alignment throughout.

AAdobe Fonts 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

27 Resources

Scripts

Styles

Async

Defer

Top Script Sources

assets.squarespace.com(10)definitions.sqspcdn.com(9)use.typekit.net(1)

Website Identity

Facebook X (Twitter)Instagram

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Last analyzed: 13 Feb 2026 at 13:32

Historical Analysis & Change Tracking