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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transistor.fm

https://transistor.fm· First analyzed 15 Feb 2026· Updated 15 Feb 2026

Export

transistor.fm

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

75.2.60.5

Server Location

🇺🇸 Seattle, United States

ASN

AS16509

Organization

AWS Global Accelerator (GLOBAL)

Server

Netlify

Nameservers

ns-1358.awsdns-41.org.ns-1564.awsdns-03.co.uk.ns-285.awsdns-35.com.ns-1016.awsdns-63.net.

Performance

Page Speed

3.4 MB

43 requests

Image Optimization

WebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Tailwind CSS

Infrastructure

Hosting

Amazon Web Services (AWS)

Technology Stack

7 Technologies Detected

Analytics

Facebook Pixel Fathom Analytics

Frameworks

CSS Frameworks

Fonts

Customer Support

Platforms

SEO Analysis

B78/100

transistor.fmtransistor.fm

Host Unlimited Shows • Best Podcast Hosting for Creators • Transistor

Easily publish your podcast to Apple Podcasts, Spotify, YouTube, and more. Excellent customer support. Podcast analytics. Free website.

Title Length69 chars

Recommended: 50-60 chars

Description Length135 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (59/63)

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

Sponsored

Security Score

76%Good

Static / Informational

HTTPS

No WAF

50d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

06.01.2026

Valid Until

06.04.2026

Subject Alternative Names (2)

transistor.fmwww.transistor.fm

SHA-256 Fingerprint

4A:E8:07:A1:64:52:89:CD:44:8F:E0:F1:7A:FB:87:59:56:93:1D:12...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

age

61592

cache-control

🟡 0s(public,max-age=0,must-revalidate)

cache-status

"Netlify Edge"; hit

content-encoding

⚡ Brotli(br)

content-length

47464

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (5)

aspmx.l.google.com

alt2.aspmx.l.google.com

alt1.aspmx.l.google.com

alt3.aspmx.l.google.com

+1 more

Domain Information

transistor.fm

Domain Age

8y 11m

Created

08.03.2017

Expires

08.03.2027

Last Updated

06.02.2026

Registrar

Namecheap

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

ui-sans-serif

82/100

Readability

/30

32/40

14px · LH 1.43

Hierarchy

/20

25/25

5.71x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

ui-sans-serif

Sans80px

Body Font

ui-sans-serif

Sans14px

Contrast Ratio

Reading Comfort

~39 CPL

Needs attention

80px

48px

14px

16px

14px

⚠️ Small text: 14px may be hard to read on mobile. Consider 16px+.

✅ Optimal line spacing: 1.43 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 5.7x larger than body text.

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

✅ 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.

GGoogle Fonts

Business & Marketing Stack

4 Tools Detected

Advanced

Customer Support

CrispSMB

Live chat and helpdesk tools

Behavior Analytics

FathomSMB

Google AnalyticsFree

User behavior and product analytics

Affiliate & Partnerships

RewardfulSMB

Affiliate networks and partner tracking

Sponsored

Scripts & Styles

8 Resources

Scripts

Styles

Async

Defer

Top Script Sources

client.crisp.chat(2)transistor.fm(1)cdn.usefathom.com(1)r.wdfl.co(1)

Website Identity

Facebook Instagram YouTube Bluesky

Sponsored

Last analyzed: 15 Feb 2026 at 11:28

Historical Analysis & Change Tracking