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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prusa3d.com

https://prusa3d.com· First analyzed 18 Feb 2026· Updated 18 Feb 2026

Export

prusa3d.com

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.20.24.50

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

carl.ns.cloudflare.com.lara.ns.cloudflare.com.

Performance

Page Speed

1.4 MB

165 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Hybrid

⚙️ SSR

Frontend

Framework

Next.js

CMS

WordPress

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Technology Stack

20 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel Microsoft Clarity Segment FullStory

Advertising

Google Ads Twitter Ads LinkedIn Ads Microsoft Advertising

Meta Frameworks

Other

CSS Frameworks

Icon Libraries

Tag Managers

Marketing

Customer Support

Reviews

CDN

Security

SEO Analysis

A80/100

prusa3d.comprusa3d.com

Original Prusa 3D printers directly from Josef Prusa

Eshop by Prusa Research a.s., company founded by Josef Prusa, one of the RepRap core developers. We're selling Original Prusa 3D printers (incl. Prusa MK4, P...

Description truncated.

Title Length52 chars

Recommended: 50-60 chars

Description Length265 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

27 rules

Sitemap reference found

Sponsored

Security Score

71%Good

Interactive

HTTPS

WAF

82d

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

10.02.2026

Valid Until

11.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

prusa3d.com*.prusa3d.com

SHA-256 Fingerprint

AE:F5:68:66:32:3F:C3:24:ED:E3:07:F2:B4:0A:0D:B8:06:FB:B8:35...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-headers

Content-Type, Accept, Authorization, X-Requested-With, Origi...

access-control-allow-methods

GET, POST, OPTIONS always

alt-svc

h3=":443"; ma=86400

cache-control

🔴 No Cache(private, no-cache, no-store, max-age=0, must-revalidate)

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9cfa0a6fdb272bdd-FRA

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (5)

aspmx2.googlemail.com

alt1.aspmx.l.google.com

aspmx.l.google.com

aspmx3.googlemail.com

+1 more

Domain Information

prusa3d.com

Domain Age

12y 3m

Created

30.10.2013

Expires

30.10.2026

Last Updated

09.10.2025

Registrar

Gransy, s.r.o.

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Data Protection Officer mentioned

Typography & Readability

AtlasGrotesk

61/100

Readability

/30

40/40

18px · LH 1.44

Hierarchy

/20

8/25

1x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

AtlasGrotesk

Sans18px

Body Font

AtlasGrotesk

Sans18px

Contrast Ratio

Reading Comfort

~144 CPL

Needs attention

18px

48px

24px

18px

Golden Ratio

Scale

✅ Excellent readability: 18px body text is ideal for all devices.

✅ Optimal line spacing: 1.44 ratio ensures comfortable reading.

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

✅ 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.

Buy on MyFonts

Business & Marketing Stack

16 Tools Detected

Enterprise

CRM Systems

HubSpotMid-Market

Customer Relationship Management platforms

Customer Support

LiveChatMid-Market

Live chat and helpdesk tools

Behavior Analytics

Microsoft ClarityFree

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Twitter/X AdsMid-Market

LinkedIn AdsEnterprise

Pinterest AdsMid-Market

Microsoft AdsEnterprise

Reddit PixelMid-Market

Ad platforms and retargeting pixels

Privacy & Cookies

CookieYesSMB

CookiebotMid-Market

OneTrustEnterprise

Cookie consent and privacy compliance tools

Social Media

Twitter/X WidgetsFree

Social widgets and sharing tools

Reviews & Social Proof

TrustpilotMid-Market

Customer reviews and testimonials

Sponsored

Scripts & Styles

22 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(3)clarity.ms(2)s.pinimg.com(2)connect.facebook.net(2)js-eu1.hs-banner.com(1)

Website Identity

Facebook X (Twitter)Instagram YouTube

Sponsored

Last analyzed: 18 Feb 2026 at 02:19

Historical Analysis & Change Tracking