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.

Back to Search

virtualbox.org

https://virtualbox.org· First analyzed 11 Feb 2026· Updated 11 Feb 2026

Export

virtualbox.org

Mobile

Sponsored

Hosting Provider

Oracle Cloud

oracle.com/cloud

IP Address

138.1.33.162

Server Location

🇺🇸 Phoenix, United States

ASN

AS31898

Organization

Oracle Business Network (us-phoenix-1)

Nameservers

ns1.p201.dns.oraclecloud.net.ns4.p201.dns.oraclecloud.net.a13-65.akam.net.ns3.p201.dns.oraclecloud.net.+4 more

Performance

Page Speed

1.1 MB

21 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Oracle Cloud

Technology Stack

3 Technologies Detected

Libraries

jQuery

jQuery UI

CSS Frameworks

Tailwind CSS

SEO Analysis

D41/100

virtualbox.orgvirtualbox.org

Oracle VirtualBox

No description available for this page.

Title Length17 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description - important for click-through rates
• Missing viewport meta tag - page may not be mobile-friendly

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

355 rules

Allows all crawlers

Sponsored

Security Score

76%Good

Interactive

HTTPS

No WAF

52d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

10.11.2025

Valid Until

04.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (20)

oit-git-prod-01.oracle.comattendance-education-mig.oracle.comattendance-education.oracle.comautosr3-prod-mig.oracle.comautosr3-prod.oracle.combrm-certification-mig.oracle.combrm-certification.oracle.combrm-certview-mig.oracle.com+12 more

SHA-256 Fingerprint

63:92:05:18:76:74:C6:D8:88:4C:B5:68:ED:A6:C6:6F:79:96:D0:9E...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

akamai-grn

0.0cfc733e.1770816388.2c567b8f

cache-control

⚪ Custom(must-revalidate)

content-encoding

📦 Gzip(gzip)

content-length

4246

content-security-policy

default-src 'self' 'unsafe-inline'; img-src * data:; frame-a...

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 (1)

mail.virtualbox.org

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Arial + Verdana

53/100

Readability

/30

30/40

26px · LH --

Hierarchy

/20

20/25

1.67x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Arial

Sans43px

Body Font

Verdana

Sans26px

Contrast Ratio

Reading Comfort

~105 CPL

Needs attention

43px

35px

26px

✅ Excellent readability: 26px body text is ideal for all devices.

✅ 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.

⚠️ Wide lines: ~104 chars/line. Consider max-width for better reading flow.

⚠️ Cramped layout: 12 elements lack adequate spacing.

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

10 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(7)

Sponsored

Last analyzed: 11 Feb 2026 at 13:26

Historical Analysis & Change Tracking