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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epfl.ch

https://epfl.ch· First analyzed 12 Feb 2026· Updated 12 Feb 2026

Export

epfl.ch

Mobile

Sponsored

Hosting Provider

Ecole Polytechnique Federale de Lausanne

IP Address

128.178.211.3

Server Location

🇨🇭 Lausanne, Switzerland

ASN

AS559

Organization

Ecole Polytechnique Federale de Lausanne

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

stisun1.epfl.ch.stisun2.epfl.ch.scsnms.switch.ch.

Performance

Page Speed

1.1 MB

38 requests

Image Optimization

Responsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

jQuery

Styling

Tailwind CSS

CMS

WordPressv6.9

Infrastructure

Hosting

Ecole Polytechnique Federale de Lausanne

CDN

Cloudflare

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

10 Technologies Detected

Plugins

Wp Gutenberg Epfl

Enlighter Flowpaper Lite Pdf Flipbook

Analytics

Libraries

CSS Frameworks

Tag Managers

CDN

SEO Analysis

B74/100

epfl.chepfl.ch

EPFL

Based in Lausanne (Switzerland), EPFL is a university whose three missions are education, research and innovation.

Title Length4 chars

Recommended: 50-60 chars

Description Length114 chars

Recommended: 120-160 chars

Issues (0)

4 issues found

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Crawlability

Sitemap

Type: standard

11,393 URLs

robots.txt

Sponsored

Security Score

10%Critical

Critical / Transactional

HTTPS

WAF

64d

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

Valid From

18.01.2026

Valid Until

18.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.epfl.ch

SHA-256 Fingerprint

F1:06:4A:C9:12:20:13:E5:41:DD:8D:D8:4C:87:76:01:C5:AA:3B:CF...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

age

157

cache-control

🟡 300s(max-age=300)

cf-cache-status

HIT

cf-ray🇩🇪 Frankfurt

9ccc685d3f70e7b0-FRA

content-encoding

⚡ Brotli(br)

content-security-policy-report-only

default-src 'self' 'unsafe-inline' *.epfl.ch; script-src 'se...

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

epfl-ch.mail.protection.outlook.com

Domain Information

epfl.ch

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Typography & Readability

SuisseIntl

88/100

Readability

/30

40/40

18px · LH 1.50

Hierarchy

/20

25/25

2.67x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

SuisseIntl

Sans48px

Body Font

SuisseIntl

Sans18px

Contrast Ratio

Reading Comfort

~37 CPL

Needs attention

48px

38px

28px

18px

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.7x 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.

⚠️ Cramped layout: 38 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

15 Resources

Scripts

Styles

Async

Defer

Top Script Sources

epfl.ch(6)googletagmanager.com(2)ajax.googleapis.com(1)

Website Identity

Facebook X (Twitter)Instagram YouTube

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Last analyzed: 12 Feb 2026 at 13:24

Historical Analysis & Change Tracking