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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acast.com

https://acast.com· First analyzed 12 Feb 2026· Updated 12 Feb 2026

Export

acast.com

$Desktop screenshot of acast.com$

$Mobile screenshot of acast.com$

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

3.164.206.55

Server Location

🇫🇮 Helsinki, Finland

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns-1973.awsdns-54.co.uk.ns-757.awsdns-30.net.ns-126.awsdns-15.com.ns-1333.awsdns-38.org.

Performance

Page Speed

144 KB

90 requests

Image Optimization

Lazy LoadAVIFResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Webflow

Technology Stack

14 Technologies Detected

Analytics

Other

Libraries

CSS Frameworks

Fonts

Tag Managers

Customer Support

Advertising

Reviews

CDN

SEO Analysis

C64/100

acast.comacast.com

Acast: The Best Podcast Monetization Platform

Acast helps podcasters earn more. As the leading podcast monetization platform, we connect creators with premium advertisers to drive reliable revenue.

Title Length45 chars

Recommended: 50-60 chars

Description Length151 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (89/89)

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

1,014 URLs

robots.txt

1 rules

Sitemap reference found

Allows all crawlers

Sponsored

Security Score

41%Poor

Interactive

HTTPS

WAF

32d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

16.12.2025

Valid Until

16.03.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.acast.com

SHA-256 Fingerprint

24:E3:70:89:92:3C:6A:47:8E:0C:36:DE:ED:04:C6:0F:1C:AF:6D:FB...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

age

87293

alt-svc

h3=":443"; ma=86400

cf-cache-status

HIT

cf-ray🇩🇪 Frankfurt

9ccd2c6d8e53dc9d-FRA

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (5)

alt2.aspmx.l.google.com

alt1.aspmx.l.google.com

alt3.aspmx.l.google.com

aspmx.l.google.com

+1 more

Domain Information

acast.com

Domain Age

22y 9m

Created

20.05.2003

Expires

20.05.2026

Last Updated

15.04.2025

Registrar

Amazon Registrar, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Typography & Readability

Archivo + sans-serif

71/100

Readability

/30

25/40

20px · LH 1.10

Hierarchy

/20

25/25

4.16x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Archivo

Sans83px

Body Font

sans-serif

Sans20px

Contrast Ratio

Reading Comfort

~36 CPL

Needs attention

83px

230px

20px

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

⚠️ Tight line spacing (1.10). Consider 1.4-1.6 for better readability.

✅ Strong hierarchy: Headlines are 4.2x larger than body text.

✅ Good performance: Using 2 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.

GGoogle Fonts Buy on MyFonts

Business & Marketing Stack

9 Tools Detected

Enterprise

Customer Support

IntercomMid-Market

Live chat and helpdesk tools

Behavior Analytics

HotjarMid-Market

MixpanelMid-Market

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

LinkedIn AdsEnterprise

Ad platforms and retargeting pixels

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

Social Media

Facebook SDKFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

22 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cdn.cookielaw.org(3)connect.facebook.net(2)script.hotjar.com(2)cdn.prod.website-files.com(2)widget.intercom.io(1)

Website Identity

acast.com

22 years old

Amazon Registrar, Inc.📧 Google Workspace

Social Profiles

Facebook Instagram LinkedIn

Sponsored

Last analyzed: 12 Feb 2026 at 15:38

Historical Analysis & Change Tracking