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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siriusxm.com

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

Export

siriusxm.com

Mobile

Sponsored

Hosting Provider

Sirius Satellite Radio

IP Address

209.196.203.234

Server Location

🇺🇸 New York, United States

ASN

AS27011

Organization

Sirius Satellite Radio

Server

Nginx

Nameservers

dns2.p06.nsone.net.dns3.p06.nsone.net.dns4.p06.nsone.net.ns01.sxmentsvcs.com.+4 more

Performance

Page Speed

2.2 MB

244 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Hybrid

🔀 Hybrid

Frontend

Framework

Next.js

CMS

Adobe Experience Manager

Infrastructure

Hosting

Sirius Satellite Radio

Technology Stack

10 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel

Advertising

Google Ads Twitter Ads Microsoft Advertising

Meta Frameworks

CSS Frameworks

Tag Managers

Web Servers

SEO Analysis

B78/100

siriusxm.comsiriusxm.com

SiriusXM: Music, Sports, Talk & Podcasts, Live & On Demand

Whether it’s new hip-hop and classic comedy or ‘90s jams and sports podcasts, everything you want to hear lives here at SiriusXM.

Title Length58 chars

Recommended: 50-60 chars

Description Length129 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag - every page should have one H1

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

9 rules

Sitemap reference found

Allows all crawlers

Sponsored

Security Score

36%Critical

Interactive

HTTPS

No WAF

226d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

30.09.2025

Valid Until

29.09.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.siriusxm.comsiriusxm.com

SHA-256 Fingerprint

10:03:7A:71:C4:1A:E4:1A:D3:60:45:D5:B1:48:3F:A1:46:AC:C9:5A...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

akamai-grn

0.14011002.1771128492.13d51ea2

alt-svc

h3=":443"; ma=93600

cache-control

🟡 0s(private, max-age=0)

content-encoding

⚡ Brotli(br)

content-length

35142

content-type

text/html; charset=utf-8

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

mx0a-0051e301.pphosted.com

mx0b-0051e301.pphosted.com

Domain Information

siriusxm.com

Domain Age

18y 10m

Created

29.03.2007

Expires

29.03.2030

Last Updated

17.07.2025

Registrar

MarkMonitor Inc.

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Typography & Readability

Helvetica Now

54/100

Readability

/30

25/40

20px · LH 1.00

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Helvetica Now

Sans

Body Font

Helvetica Now

Sans20px

Contrast Ratio

Reading Comfort

~37 CPL

Needs attention

60px

32px

20px

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

⚠️ Tight line spacing (1.00). Consider 1.4-1.6 for better readability.

✅ 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.

⚠️ Cramped layout: 103 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

10 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

Quantum MetricEnterprise

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Twitter/X AdsMid-Market

Reddit PixelMid-Market

Pinterest AdsMid-Market

Microsoft AdsEnterprise

Ad platforms and retargeting pixels

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

Social Media

Twitter/X WidgetsFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(4)connect.facebook.net(3)googletagmanager.com(3)s.yimg.com(2)apps.rokt-api.com(1)

Website Identity

Facebook X (Twitter)TikTok

Sponsored

Last analyzed: 15 Feb 2026 at 04:08

Historical Analysis & Change Tracking