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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creditcards.com

https://creditcards.com· First analyzed 19 Feb 2026· Updated 19 Feb 2026

Export

creditcards.com

Mobile

Sponsored

Hosting Provider

Pantheon

IP Address

151.101.2.133

Server Location

🇨🇦 Montreal, Canada

ASN

AS54113

Organization

Fastly, Inc.

Server

Nginx

CDN

Fastly

Nameservers

ns-1047.awsdns-02.org.ns-1645.awsdns-13.co.uk.ns-457.awsdns-57.com.ns-696.awsdns-23.net.

Performance

Page Speed

489 KB

60 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv5.7.2

cms

CCDC 2019

by CreditCards.com

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

8 Technologies Detected

Analytics

Libraries

Other

CSS Frameworks

Tag Managers

Web Servers

Plugins

SEO Analysis

A+94/100

creditcards.comcreditcards.com

Credit cards: Find the Right Card For You at Creditcards.com

Find the best credit cards by comparing a variety of offers for balance transfers, rewards, low interest, and more. Apply online at CreditCards.com.

Title Length60 chars

Recommended: 50-60 chars

Description Length148 chars

Recommended: 120-160 chars

Issues (0)

1 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

8 URLs

robots.txt

27 rules

Sitemap reference found

Sponsored

Security Score

55%Poor

Critical / Transactional

HTTPS

No WAF

15d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Certainly

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

05.02.2026

Valid Until

07.03.2026

Subject Alternative Names (1)

*.creditcards.com

SHA-256 Fingerprint

83:7B:92:95:15:EA:5B:BA:6A:F4:AB:5C:A9:66:29:20:6E:AF:16:85...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

access-control-allow-credentials

True

access-control-allow-origin

age

73527

cache-control

🟢 1 Month(public, max-age=2592000)

content-encoding

📦 Gzip(gzip)

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

creditcards-com.mail.protection.outlook.com

Domain Information

creditcards.com

Domain Age

31 years

Created

22.02.1995

Expires

10.10.2031

Last Updated

28.02.2022

Registrar

GoDaddy Corporate Domains, LLC

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Data Protection Officer mentioned

Typography & Readability

Sofia Pro + Open Sans

78/100

Readability

/30

32/40

18px · LH 1.33

Hierarchy

/20

25/25

2.33x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Sofia Pro

Sans42px

Body Font

Open Sans

Sans18px

Contrast Ratio

Reading Comfort

~42 CPL

Needs attention

42px

29px

18px

✅ Excellent readability: 18px body text is ideal for all devices.

✅ Strong hierarchy: Headlines are 2.3x 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.

⚠️ Cramped layout: 9 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

20 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(9)googletagmanager.com(2)sb.scorecardresearch.com(1)google-analytics.com(1)creditcards.com(1)

Website Identity

creditcards.com

31 years old

GoDaddy Corporate Domains, LLC📧 Microsoft 365

Social Profiles

Facebook X (Twitter)Instagram YouTube

Sponsored

Last analyzed: 19 Feb 2026 at 11:00

Historical Analysis & Change Tracking