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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csic.es

https://csic.es· First analyzed 12 Feb 2026· Updated 12 Feb 2026

Export

csic.es

Mobile

Sponsored

Hosting Provider

Csic

IP Address

161.111.100.76

Server Location

🇪🇸 Villanueva de la Cañada, Spain

ASN

AS766

Organization

Csic

Server

Apache

Nameservers

chico.rediris.es.olmo.csic.es.sun.rediris.es.sabina.cti.csic.es.

Performance

Page Speed

13.3 MB

172 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

jQuery

Styling

Tailwind CSS

CMS

Drupal

Infrastructure

Hosting

Csic

Technology Stack

11 Technologies Detected

Libraries

CSS Frameworks

UI Components

Other

AOS (Animate On Scroll)

Icon Libraries

Fonts

Analytics

Web Servers

SEO Analysis

C64/100

csic.escsic.es

Consejo Superior de Investigaciones Científicas

El Consejo Superior de Investigaciones Científicas (CSIC) es una Agencia Estatal para la investigación científica y el desarrollo tecnológico, con personalid...

Description truncated.

Title Length47 chars

Recommended: 50-60 chars

Description Length308 chars

Recommended: 120-160 chars

Issues (0)

5 issues found

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Crawlability

Sitemap

Type: standard

439 URLs

robots.txt

46 rules

Sponsored

Security Score

61%Fair

Interactive

HTTPS

No WAF

56d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

10.04.2025

Valid Until

10.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

csic.eswww.csic.es

SHA-256 Fingerprint

E4:C8:1D:CA:62:AA:A8:B2:FF:9B:FA:A7:B2:4F:A4:68:41:2D:CB:EB...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

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HTTP Headers

Developer Console

access-control-allow-headers

X-Requested-With, Content-Type, Origin

access-control-allow-methods

GET, POST, OPTIONS

access-control-allow-origin

https://www.csic.es

cache-control

🔴 No Cache(must-revalidate, no-cache, private)

content-language

content-security-policy

report-uri /report-csp-violation

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

mx.csic.es

Domain Information

csic.es

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

Typography & Readability

Montserrat + sans-serif

41/100

Readability

/30

25/40

20px · LH 1.00

Hierarchy

/20

18/25

3.28x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Montserrat

Sans64px

Body Font

sans-serif

Sans20px

Contrast Ratio

Reading Comfort

~36 CPL

Needs attention

64px

35px

20px

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

⚠️ Tight line spacing (1.00). Consider 1.4-1.6 for better readability.

✅ Strong hierarchy: Headlines are 3.3x larger than body text.

✅ 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.

GGoogle Fonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Matomo (Piwik)Mid-Market

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(15)use.fontawesome.com(2)static.addtoany.com(2)stats.sgai.csic.es(1)

Website Identity

Facebook X (Twitter)Instagram YouTube TikTok Bluesky

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Last analyzed: 12 Feb 2026 at 19:59

Historical Analysis & Change Tracking