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

libsyn.com

https://libsyn.com· First analyzed 11 Feb 2026· Updated 11 Feb 2026

Export

libsyn.com

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.19.154.92

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns2.libsyn.com.ns3.libsyn.com.ns4.libsyn.com.ns1.libsyn.com.

Performance

Page Speed

4.2 MB

172 requests

0–49

50–89

90–100

Architecture Stack

Headless

⚙️ SSR

Decoupled

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Detected API Sources

https://maps.googleapis.com/ma...

Technology Stack

30 Technologies Detected

Plugins

Listdom Safe Svg Pdf Embedder

Qi Addons For Elementor

Elementor

Essential Blocks

Premium Addons For Elementor

Libraries

Analytics

UI Components

CSS Frameworks

Other

Other

Icon Libraries

Fonts

Tag Managers

Advertising

Microsoft Advertising

Reviews

Trustpilot

CDN

Cloudflare

Marketing

HubSpot

SEO Analysis

A82/100

libsyn.comlibsyn.com

The Best Podcast Hosting Platform | Libsyn Podcasting

The best podcast hosting, distribution & monetization platform. Detailed stats | Excellent service | Start for free

Title Length53 chars

Recommended: 50-60 chars

Description Length115 chars

Recommended: 120-160 chars

Issues (0)

2 issues found

Upgrade to view details

Sponsored

Security Score

36%Critical

Interactive

HTTPS

WAF

205d

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

age

19818

alt-svc

h3=":443"; ma=86400

cache-control

🟡 0s(public, max-age=0, s-maxage=2592000)

cf-cache-status

HIT

cf-ray🇩🇪 Frankfurt

9cc11dc2bff2dbf4-FRA

content-encoding

zstd

Good Warning Issue

Typography & Readability

Inter

83/100

Readability

/30

40/40

20px · LH 1.50

Hierarchy

/20

25/25

3.55x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Inter

Sans71px

Body Font

Inter

Sans20px

Contrast Ratio

Reading Comfort

~35 CPL

Needs attention

71px

32px

28px

20px

✅ Excellent readability: 20px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 3.5x 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.

✅ Protected text on images: Using gradient for readability.

GGoogle Fonts Buy on MyFonts

Business & Marketing Stack

9 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

HotjarMid-Market

Google AnalyticsFree

ContentsquareEnterprise

User behavior and product analytics

Advertising

Microsoft AdsEnterprise

Reddit PixelMid-Market

Ad platforms and retargeting pixels

Privacy & Cookies

OneTrustEnterprise

GDPR Cookie ConsentFree

Cookie consent and privacy compliance tools

Reviews & Social Proof

TrustpilotMid-Market

Customer reviews and testimonials

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

libsyn.com(16)load.data.libsyn.com(2)redditstatic.com(1)bat.bing.com(1)

Website Identity

libsyn.com

Sponsored

Last analyzed: 11 Feb 2026 at 04:31

Historical Analysis & Change Tracking