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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verizonwireless.com

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

Export

verizonwireless.com

Sponsored

Hosting Provider

Verizon Wireless

IP Address

137.188.80.90

Server Location

🇺🇸 Detroit, United States

ASN

AS12079

Organization

Verizon Wireless

CDN

Akamai

WAF

Akamai

Nameservers

ns-scrm.verizonwireless.com.ns-tmtr.verizonwireless.com.ns-twbg.verizonwireless.com.

Performance

Page Speed

1.2 MB

272 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Adobe Experience Manager

Technology Stack

15 Technologies Detected

Advertising

Google Ads Twitter Ads LinkedIn Ads Pinterest Tag Snapchat Pixel Microsoft Advertising

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel Microsoft Clarity

Libraries

CSS Frameworks

Email Marketing

Customer Support

SEO Analysis

C68/100

verizonwireless.comverizonwireless.com

Verizon: Wireless, Internet, TV and Phone Services | Official Site

Shop Verizon smartphone deals and wireless plans on the largest 4G LTE network. First to 5G. Get Fios for the fastest internet, TV and phone service.

Title Length66 chars

Recommended: 50-60 chars

Description Length149 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (35/38)

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

14 URLs

robots.txt

163 rules

Sitemap reference found

Sponsored

Security Score

71%Good

Interactive

HTTPS

WAF

295d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

09.12.2025

Valid Until

08.12.2026

OCSP Stapling

Enabled

Subject Alternative Names (6)

verizon.comws01.static-verizon.comws02.static-verizon.comws03.static-verizon.comws04.static-verizon.comwww.verizon.com

SHA-256 Fingerprint

C7:EE:6F:51:C2:20:CE:05:4F:29:30:1F:03:72:34:2F:0C:0B:C1:0B...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

akamai-grn

0.3cef2017.1771261153.18c2271

cdn-requestid

content-encoding

📦 Gzip(gzip)

content-length

28733

content-security-policy

frame-ancestors 'self' *.verizon.com *.verizonwireless.com *...

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

mxb-0024a201.gslb.pphosted.com

mxa-0024a201.gslb.pphosted.com

Domain Information

verizonwireless.com

Domain Age

25y 11m

Created

03.03.2000

Expires

03.03.2026

Last Updated

27.02.2025

Registrar

CSC Corporate Domains, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

Data Protection Officer mentioned

Typography & Readability

Helvetica + arial

44/100

Readability

/30

25/40

20px · LH 1.00

Hierarchy

/20

18/25

2x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Helvetica

Sans40px

Body Font

arial

Sans20px

Contrast Ratio

Reading Comfort

~45 CPL

Optimal (45–75)

40px

24px

20px

✅ Excellent readability: 20px body text is ideal for all devices.

⚠️ Tight line spacing (1.00). Consider 1.4-1.6 for better readability.

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

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

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

⚠️ Risky: Text appears on background images without overlay protection.

Buy on MyFonts

Business & Marketing Stack

12 Tools Detected

Enterprise

Behavior Analytics

Microsoft ClarityFree

Google AnalyticsFree

Quantum MetricEnterprise

Google Tag ManagerFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Twitter/X AdsMid-Market

LinkedIn AdsEnterprise

Pinterest AdsMid-Market

Microsoft AdsEnterprise

AdRollMid-Market

Snapchat PixelMid-Market

Ad platforms and retargeting pixels

Social Media

Twitter/X WidgetsFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

23 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(3)assets.adobedtm.com(3)connect.facebook.net(2)scache-ws.vzw.com(2)verizon.com(2)

Website Identity

Facebook X (Twitter)Instagram YouTube TikTok

Sponsored

Last analyzed: 16 Feb 2026 at 16:59

Historical Analysis & Change Tracking