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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vwo.com

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

Export

vwo.com

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.26.1.65

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

bonnie.ns.cloudflare.com.jay.ns.cloudflare.com.

Performance

Page Speed

1018 KB

144 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

VWOv0.1

by Wingify

View Theme

Technology Stack

18 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Segment Matomo

Other

GSAP AOS (Animate On Scroll)Lottie

Libraries

Customer Support

Plugins

CSS Frameworks

Tag Managers

Advertising

Microsoft Advertising

Other

VWO

CDN

Cloudflare

SEO Analysis

A+94/100

vwo.comvwo.com

VWO | Digital Experience Optimization

VWO is the market-leading digital experience optimization solution that fast-growing companies use for experimentation & conversion rate optimization.

Title Length37 chars

Recommended: 50-60 chars

Description Length150 chars

Recommended: 120-160 chars

Issues (0)

1 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

4 URLs

robots.txt

94 rules

Sitemap reference found

Sponsored

Security Score

65%Fair

Critical / Transactional

HTTPS

WAF

53d

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+H3

Valid From

11.01.2026

Valid Until

11.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

vwo.com*.vwo.com

SHA-256 Fingerprint

80:29:0A:FA:42:CF:AC:E6:EB:DC:6B:8E:B5:68:55:4E:95:0B:00:AA...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cache-control

🟡 10s(private, max-age=10)

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9cee4935bfebd1ff-FRA

content-encoding

📦 Gzip(gzip)

content-security-policy

object-src 'none'; frame-ancestors 'self' https://vwo.com ht...

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (3)

alt1.aspmx.l.google.com

aspmx.l.google.com

alt2.aspmx.l.google.com

Domain Information

vwo.com

Domain Age

25y 11m

Created

02.03.2000

Expires

02.03.2033

Last Updated

05.03.2025

Registrar

Name.com, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Typography & Readability

-apple-system

75/100

Readability

/30

20/40

13px · LH 1.50

Hierarchy

/20

25/25

4.62x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

-apple-system

Sans60px

Body Font

-apple-system

Sans13px

Contrast Ratio

Reading Comfort

~36 CPL

Needs attention

60px

16px

15px

18px

13px

Minor Second

Scale

❌ Critical: 13px body text is too small. Increase to at least 14px.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 4.6x larger than body text.

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

✅ Consistent design: Single font family with weight variations is a modern best practice.

✅ Protected text on images: Using gradient for readability.

Business & Marketing Stack

9 Tools Detected

Enterprise

Marketing Automation

MarketoEnterprise

Email marketing and automation platforms

Customer Support

IntercomMid-Market

Live chat and helpdesk tools

Behavior Analytics

Matomo (Piwik)Mid-Market

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Microsoft AdsEnterprise

Ad platforms and retargeting pixels

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

Social Media

LinkedIn WidgetsFree

Social widgets and sharing tools

A/B Testing & Optimization

VWO (Visual Website Optimizer)Mid-Market

Experimentation and conversion optimization

Sponsored

Scripts & Styles

23 Resources

Scripts

Styles

Async

Defer

Top Script Sources

vwo.com(5)bat.bing.com(4)googletagmanager.com(3)munchkin.marketo.net(2)widget.intercom.io(1)

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Last analyzed: 16 Feb 2026 at 16:05

Historical Analysis & Change Tracking