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

arthritis.org

https://arthritis.org· First analyzed 14 Feb 2026· Updated 14 Feb 2026

Export

arthritis.org

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.20.28.4

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

nick.ns.cloudflare.com.arya.ns.cloudflare.com.

Performance

Page Speed

6.5 MB

146 requests

Image Optimization

ResponsiveUploadcare

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Kentico

Technology Stack

20 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel Microsoft Clarity Segment

Advertising

Google Ads LinkedIn Ads Microsoft Advertising

Libraries

CSS Frameworks

Fonts

Adobe Fonts (Typekit)Adobe Fonts

Icon Libraries

Tag Managers

Other

Other

CDN

Frameworks

SEO Analysis

B70/100

arthritis.orgarthritis.org

Arthritis Foundation | Arthritis Support, Resources, Research & Adv...

The Arthritis Foundation is the largest nonprofit organization dedicated to the prevention, control and cure of America's leading cause of disability.

Title truncated.

Title Length72 chars

Recommended: 50-60 chars

Description Length150 chars

Recommended: 120-160 chars

Issues (0)

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

4 rules

Sitemap reference found

Allows all crawlers

Sponsored

Security Score

26%Critical

Interactive

HTTPS

WAF

62d

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

Valid From

18.01.2026

Valid Until

18.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

arthritis.org*.arthritis.org

SHA-256 Fingerprint

D9:B9:D0:25:7F:18:B6:3C:7C:42:95:7C:23:8D:9C:69:41:B7:CB:79...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟣 Private(private)

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9cd918471f93d285-FRA

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=utf-8

date

Sat, 14 Feb 2026 02:21:55 GMT

Good Warning Issue

Email Infrastructure

Barracuda

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

d187006a.ess.barracudanetworks.com

d187006b.ess.barracudanetworks.com

Domain Information

arthritis.org

Domain Age

32y 3m

Created

15.11.1993

Expires

14.11.2027

Last Updated

20.09.2022

Registrar

Network Solutions, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

Typography & Readability

futura-pt

62/100

Readability

/30

40/40

17px · LH 1.50

Hierarchy

/20

21/25

3.3x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

futura-pt

Sans56px

Body Font

futura-pt

Sans17px

Contrast Ratio

Reading Comfort

~36 CPL

Needs attention

56px

42px

96px

21px

17px

Minor Second

Scale

✅ Excellent readability: 17px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 3.3x 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.

AAdobe Fonts Buy on MyFonts

Business & Marketing Stack

10 Tools Detected

Enterprise

Marketing Automation

MarketoEnterprise

Email marketing and automation platforms

Behavior Analytics

Microsoft ClarityFree

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

LinkedIn AdsEnterprise

Pinterest AdsMid-Market

Microsoft AdsEnterprise

Ad platforms and retargeting pixels

Social Media

Twitter/X WidgetsFree

Social widgets and sharing tools

A/B Testing & Optimization

VWO (Visual Website Optimizer)Mid-Market

Experimentation and conversion optimization

Sponsored

Scripts & Styles

28 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(4)s.pinimg.com(2)snap.licdn.com(2)connect.facebook.net(2)lightboxcdn.com(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn

Sponsored

Last analyzed: 14 Feb 2026 at 02:22

Historical Analysis & Change Tracking