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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cspinet.org

https://cspinet.org· First analyzed 19 Feb 2026· Updated 19 Feb 2026

Export

cspinet.org

Sponsored

Hosting Provider

Google Cloud Platform

cloud.google.com

IP Address

34.75.104.115

Server Location

🇺🇸 North Charleston, United States

ASN

AS396982

Organization

Google Cloud (us-east1)

CDN

Fastly

Nameservers

ns98.worldnic.com.ns97.worldnic.com.

Performance

Page Speed

2.4 MB

124 requests

Image Optimization

WebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Drupal

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

13 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel

Advertising

Google Ads LinkedIn Ads Microsoft Advertising

Frameworks

Meta Frameworks

Libraries

CSS Frameworks

Fonts

Adobe Fonts (Typekit)

Tag Managers

Google Tag Manager

Popups & Forms

Wisepops

SEO Analysis

A82/100

cspinet.orgcspinet.org

Center for Science in the Public Interest

Since 1971, the Center for Science in the Public Interest has been a strong advocate for nutrition and health, food safety, alcohol policy, and sound science.

Title Length41 chars

Recommended: 50-60 chars

Description Length158 chars

Recommended: 120-160 chars

Issues (0)

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

3 URLs

robots.txt

61 rules

Sitemap reference found

Allows all crawlers

Sponsored

Security Score

56%Poor

Interactive

HTTPS

No WAF

88d

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

Valid From

18.02.2026

Valid Until

19.05.2026

Subject Alternative Names (2)

cspi.orgwww.cspi.org

SHA-256 Fingerprint

30:DA:94:C4:57:D9:F5:61:84:F2:0F:B9:EB:E6:92:86:55:33:89:12...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

age

8156

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate, max-age=0)

content-encoding

📦 Gzip(gzip)

content-language

content-length

22630

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

mx2-us1.ppe-hosted.com

mx1-us1.ppe-hosted.com

Domain Information

cspinet.org

Domain Age

30 years

Created

24.02.1996

Expires

25.02.2028

Last Updated

01.01.2026

Registrar

Network Solutions, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Tiempos + AvenirNext

21/100

Readability

/30

5/40

12px · LH 2.43

Hierarchy

/20

18/25

2.5x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Tiempos

Sans30px

Body Font

AvenirNext

Sans12px

Contrast Ratio

Reading Comfort

~37 CPL

Needs attention

30px

18px

12px

❌ Critical: 12px body text is too small. Increase to at least 14px.

⚠️ Wide line spacing (2.43). Consider 1.4-1.8 for better flow.

✅ Strong hierarchy: Headlines are 2.5x 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.

AAdobe Fonts Buy on MyFonts

Business & Marketing Stack

5 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

LinkedIn AdsEnterprise

Microsoft AdsEnterprise

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

24 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(7)googletagmanager.com(3)bat.bing.com(2)connect.facebook.net(2)tags.srv.stackadapt.com(1)

Website Identity

Facebook Instagram YouTube TikTok Threads Bluesky

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Last analyzed: 19 Feb 2026 at 17:29

Historical Analysis & Change Tracking