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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blubrry.com

https://blubrry.com· First analyzed 15 Feb 2026· Updated 15 Feb 2026

Export

blubrry.com

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

13.33.235.60

Server Location

🇺🇸 New York, United States

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

Apache

CDN

CloudFront

Nameservers

ns-569.awsdns-07.net.ns-1199.awsdns-21.org.ns-1866.awsdns-41.co.uk.ns-401.awsdns-50.com.

Performance

Page Speed

1.6 MB

79 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

jQuery

Styling

Tailwind CSS

CMS

WordPressv6.8.3

Infrastructure

Hosting

Amazon Web Services (AWS)

CDN

CloudFront

Technology Stack

15 Technologies Detected

Analytics

Plugins

Team Members Trustpilot Reviews Page Links To

CSS Frameworks

Libraries

Tag Managers

Email Marketing

Reviews

Web Servers

SEO Analysis

A+94/100

blubrry.comblubrry.com

Blubrry Podcast Platform

Blubrry podcast platform provides hosting, statistics, distribution, website, monetization, and more with phone support, with a free trial.

Title Length24 chars

Recommended: 50-60 chars

Description Length139 chars

Recommended: 120-160 chars

Issues (0)

1 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

4 URLs

robots.txt

3 rules

Sitemap reference found

Allows all crawlers

Sponsored

Security Score

46%Poor

Interactive

HTTPS

No WAF

296d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

10.11.2025

Valid Until

08.12.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

blubrry.com

SHA-256 Fingerprint

55:BD:38:70:9F:B3:48:00:49:A4:E3:79:D2:D5:0C:ED:13:B0:7E:22...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

age

31715

cache-control

🔵 1 Days(max-age=86400)

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Sat, 14 Feb 2026 22:17:40 GMT

expires

Sun, 15 Feb 2026 22:17:40 GMT

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (5)

alt2.aspmx.l.google.com

aspmx2.googlemail.com

aspmx3.googlemail.com

aspmx.l.google.com

+1 more

Domain Information

blubrry.com

Domain Age

20y 1m

Created

04.01.2006

Expires

04.01.2027

Last Updated

04.01.2026

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Roboto + Roboto Light

47/100

Readability

/30

20/40

13px · LH 1.50

Hierarchy

/20

20/25

1.83x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

17/20

System fonts

Heading Font

Roboto

Sans24px

Body Font

Roboto Light

Sans13px

Contrast Ratio

Reading Comfort

~38 CPL

Needs attention

24px

28px

36px

16px

13px

❌ Critical: 13px body text is too small. Increase to at least 14px.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Good hierarchy: Clear distinction between headlines and body text.

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

⚠️ Risky: Text appears on background images without overlay protection.

⚠️ Cramped layout: 68 elements lack adequate spacing.

Business & Marketing Stack

7 Tools Detected

Enterprise

Marketing Automation

MailchimpSMB

Email marketing and automation platforms

Behavior Analytics

HotjarMid-Market

Google Tag ManagerFree

Google AnalyticsFree

ContentsquareEnterprise

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Reviews & Social Proof

TrustpilotMid-Market

Customer reviews and testimonials

Sponsored

Scripts & Styles

28 Resources

Scripts

Styles

Async

Defer

Top Script Sources

connect.facebook.net(4)blubrry.com(4)googletagmanager.com(2)assets.blubrry.com(2)invitejs.trustpilot.com(1)

Website Identity

blubrry.com

20 years old

GoDaddy.com, LLC📧 Google Workspace

Social Profiles

Facebook X (Twitter)Instagram LinkedIn YouTube TikTok

Sponsored

Last analyzed: 15 Feb 2026 at 07:06

Historical Analysis & Change Tracking