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.

Back to Search

capitalone.com

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

Export

capitalone.com

Mobile

Sponsored

Hosting Provider

Capital One Financial Corporation

IP Address

204.63.43.34

Server Location

🇺🇸 San Jose, United States

ASN

AS16660

Organization

Capital One Financial Corporation

CDN

CloudFront

Nameservers

ns5.capitalone.com.ns2.capitalone.com.ns6.capitalone.com.a3-64.akam.net.+8 more

Performance

Page Speed

1 MB

210 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

Angular

CMS

Ghost

Infrastructure

Hosting

Capital One Financial Corporation

CDN

CloudFront

Technology Stack

6 Technologies Detected

Analytics

Frameworks

CSS Frameworks

Advertising

Customer Support

SEO Analysis

A82/100

capitalone.comcapitalone.com

Capital One | Credit Cards, Checking, Savings & Auto Loans

Learn how banking with Capital One can help you meet your financial goals.

Title Length58 chars

Recommended: 50-60 chars

Description Length74 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (40/46)

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

28 URLs

robots.txt

96 rules

Sitemap reference found

Sponsored

Security Score

30%Critical

Critical / Transactional

HTTPS

No WAF

245d

Certificate Details

Type

Extended Validation (EV)

Certificate Authority

DigiCert Inc

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

17.10.2025

Valid Until

16.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.capitalone.comcapitalone.com

SHA-256 Fingerprint

07:59:7A:43:83:5F:FE:73:3B:BC:C6:27:BE:4C:31:83:E5:7A:E7:45...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(max-age=0, no-cache)

content-encoding

📦 Gzip(gzip)

content-length

123418

content-type

text/html

cross-origin-opener-policy

same-origin

date

Fri, 13 Feb 2026 22:01:21 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

mx0b-001b4103.pphosted.com

mx0a-001b4103.pphosted.com

Domain Information

capitalone.com

Domain Age

30y 11m

Created

13.03.1995

Expires

14.03.2027

Last Updated

11.02.2026

Registrar

GoDaddy Corporate Domains, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Optimist

68/100

Readability

/30

40/40

16px · LH 1.50

Hierarchy

/20

25/25

2x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Optimist

Sans32px

Body Font

Optimist

Sans16px

Contrast Ratio

Reading Comfort

~37 CPL

Needs attention

32px

24px

32px

24px

16px

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

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

✅ Good performance: Using 1 font families keeps load times fast.

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

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

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

Google Tag ManagerFree

User behavior and product analytics

Sponsored

Scripts & Styles

24 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(20)

Website Identity

Facebook X (Twitter)Instagram LinkedIn YouTube

Sponsored

Last analyzed: 13 Feb 2026 at 22:01

Historical Analysis & Change Tracking