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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altervista.org

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

Export

altervista.org

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

63.35.4.242

Server Location

🇮🇪 Dublin, Ireland

ASN

AS16509

Organization

AWS EC2 (eu-west-1)

Server

Nginx

CDN

CloudFront

Nameservers

ns1.altervista.org.ns3.altervista.org.ns2.altervista.org.ns4.altervista.org.

Performance

Page Speed

2.7 MB

48 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Amazon Web Services (AWS)

CDN

CloudFront

Technology Stack

7 Technologies Detected

Analytics

UI Components

CSS Frameworks

Fonts

Tag Managers

Web Servers

SEO Analysis

B70/100

altervista.orgaltervista.org

Create a blog or website for free and make money online - Altervista

Do you want to create a website for free? Find out how to do it on Altervista: open a blog or a website quickly and easily and start making money online. Alt...

Description truncated.

Title Length68 chars

Recommended: 50-60 chars

Description Length190 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (18/19)

4 issues found

Upgrade to view details

Sponsored

Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

287d

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

age

13745

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Tue, 10 Feb 2026 21:54:10 GMT

server

nginx/1.18.0 (Ubuntu)

via

1.1 ec7c49e0bdff8d2da026b54143deeec2.cloudfront.net (CloudFr...

Good Warning Issue

Typography & Readability

Kanit + sans-serif

83/100

Readability

/30

40/40

24px · LH 1.50

Hierarchy

/20

25/25

2.5x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Kanit

Sans60px

Body Font

sans-serif

Sans24px

Contrast Ratio

Reading Comfort

~37 CPL

Needs attention

60px

24px

Minor Second

Scale

✅ Excellent readability: 24px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.5x 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.

✅ Protected text on images: Using gradient for readability.

GGoogle Fonts

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

IubendaSMB

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

21 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(5)cdn.iubenda.com(4)cdn-gl.imrworldwide.com(2)googletagmanager.com(2)dafne.sirio.stbm.it(2)

Website Identity

altervista.org

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Last analyzed: 11 Feb 2026 at 01:43

Historical Analysis & Change Tracking