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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charitynavigator.org

https://charitynavigator.org· First analyzed 13 Feb 2026· Updated 13 Feb 2026

Export

Mobile

Sponsored

Hosting Provider

Fastly, Inc.

IP Address

151.101.65.91

Server Location

🇨🇦 Montreal, Canada

ASN

AS54113

Organization

Fastly, Inc.

CDN

Fastly

Nameservers

ns1.dnsmadeeasy.com.ns2.dnsmadeeasy.com.ns0.dnsmadeeasy.com.ns4.dnsmadeeasy.com.+1 more

Performance

Page Speed

2.2 MB

103 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

jQuery

Styling

Tailwind CSS

CMS

Adobe Experience Manager

Infrastructure

Hosting

Fastly, Inc.

CDN

Fastly

Technology Stack

14 Technologies Detected

Analytics

Advertising

LinkedIn Ads Microsoft Advertising

Libraries

jQuery

CSS Frameworks

Tailwind CSS

Fonts

Adobe Fonts (Typekit)

Tag Managers

Google Tag Manager

Customer Support

Intercom

Social

ShareThis

SEO Analysis

B70/100

charitynavigator.orgcharitynavigator.org

Charity Ratings and Donor Resources | Charity Navigator

Give and volunteer with confidence by using Charity Navigator's ratings and resources to find highly rated charities that align with your passions and values.

Title Length55 chars

Recommended: 50-60 chars

Description Length159 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag - every page should have one H1

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

601 URLs

robots.txt

12 rules

Sitemap reference found

Allows all crawlers

Sponsored

Security Score

56%Poor

Interactive

HTTPS

No WAF

89d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

13.02.2026

Valid Until

14.05.2026

Subject Alternative Names (1)

www.charitynavigator.org

SHA-256 Fingerprint

3A:79:88:E7:F4:00:70:96:D8:45:1E:93:BE:C1:95:35:65:CB:C7:35...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

age

299

alt-svc

h3=":443";ma=86400,h3-29=":443";ma=86400,h3-27=":443";ma=864...

cache-control

🟡 300s(max-age=300,s-maxage=600,stale-while-revalidate=43200,stale-...)

content-encoding

📦 Gzip(gzip)

content-length

16293

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (5)

alt2.aspmx.l.google.com

aspmx3.googlemail.com

alt1.aspmx.l.google.com

aspmx.l.google.com

+1 more

Domain Information

charitynavigator.org

Domain Age

24y 8m

Created

15.06.2001

Expires

15.06.2030

Last Updated

21.04.2025

Registrar

Network Solutions, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

sofia-pro

71/100

Readability

/30

40/40

16px · LH 1.50

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

sofia-pro

Body Font

sofia-pro

Sans16px

Contrast Ratio

Reading Comfort

~34 CPL

Needs attention

33px

16px

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

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

✅ Protected text on images: Using gradient for readability.

⚠️ Cramped layout: 21 elements lack adequate spacing.

✅ Clean layout: Consistent left alignment throughout.

Buy on MyFonts

Business & Marketing Stack

10 Tools Detected

Enterprise

Customer Support

IntercomMid-Market

Live chat and helpdesk tools

Behavior Analytics

HotjarMid-Market

HeapMid-Market

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

LinkedIn AdsEnterprise

Microsoft AdsEnterprise

Reddit PixelMid-Market

Ad platforms and retargeting pixels

Social Media

ShareThisFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

25 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(5)googletagmanager.com(3)connect.facebook.net(2)assets.adobedtm.com(2)snap.licdn.com(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn

Sponsored

Last analyzed: 13 Feb 2026 at 16:41

Historical Analysis & Change Tracking