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

askubuntu.com

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

Export

askubuntu.com

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

198.252.206.1

Server Location

🇺🇸 New York, United States

ASN

AS13335

Organization

Stack Exchange, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

damian.ns.cloudflare.com.sureena.ns.cloudflare.com.

Performance

Page Speed

537 KB

48 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Technology Stack

10 Technologies Detected

Libraries

Analytics

Advertising

Google Ads Google AdSense

Frameworks

CSS Frameworks

CDN

Customer Support

SEO Analysis

B78/100

askubuntu.comaskubuntu.com

Ask Ubuntu

Q&A for Ubuntu users and developers

Title Length10 chars

Recommended: 50-60 chars

Description Length35 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

Upgrade to view details

Sponsored

Security Score

50%Poor

Critical / Transactional

HTTPS

WAF

84d

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

07.02.2026

Valid Until

08.05.2026

Subject Alternative Names (1)

askubuntu.com

SHA-256 Fingerprint

32:DA:76:D5:3B:04:D5:64:D1:51:31:89:FE:44:56:7A:DF:95:55:DD...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

date

Thu, 12 Feb 2026 21:12:34 GMT

content-type

text/html; charset=utf-8

content-encoding

📦 Gzip(gzip)

cf-ray🇩🇪 Frankfurt

9ccf15be2f35d276-FRA

cf-cache-status

DYNAMIC

cache-control

🟣 Private(private)

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

Domain Information

askubuntu.com

Domain Age

15y 6m

Created

30.07.2010

Expires

02.02.2027

Last Updated

29.01.2026

Registrar

CSC Corporate Domains, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Typography & Readability

-apple-system

35/100

Readability

/30

12/40

12px · LH 1.31

Hierarchy

/20

18/25

2.25x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

-apple-system

Sans27px

Body Font

-apple-system

Sans12px

Contrast Ratio

Reading Comfort

~84 CPL

Needs attention

27px

16px

11px

13px

12px

❌ Critical: 12px body text is too small. Increase to at least 14px.

✅ Strong hierarchy: Headlines are 2.2x 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.

⚠️ Risky: Text appears on background images without overlay protection.

⚠️ Wide lines: ~84 chars/line. Consider max-width for better reading flow.

Business & Marketing Stack

3 Tools Detected

Enterprise

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Advertising

Google AdsEnterprise

Ad platforms and retargeting pixels

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

24 Resources

Scripts

Styles

Async

Defer

Top Script Sources

askubuntu.com(11)cdn.cookielaw.org(3)local(2)ajax.googleapis.com(1)accounts.google.com(1)

Website Identity

askubuntu.com

15 years old

CSC Corporate Domains, Inc.

Social Profiles

Facebook X (Twitter)Instagram LinkedIn

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Last analyzed: 12 Feb 2026 at 21:13

Historical Analysis & Change Tracking