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

unistra.fr

https://unistra.fr· First analyzed 15 Feb 2026· Updated 15 Feb 2026

Export

unistra.fr

Mobile

Sponsored

Hosting Provider

Unistra Iaas

IP Address

185.155.93.167

Server Location

🇫🇷 Strasbourg, France

ASN

AS2259

Organization

Unistra Iaas

Nameservers

ns1.u-strasbg.fr.shiva.jussieu.fr.ns2.u-strasbg.fr.

Performance

Page Speed

338 KB

24 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Drupal

Technology Stack

5 Technologies Detected

Analytics

Meta Frameworks

Libraries

CSS Frameworks

SEO Analysis

C62/100

unistra.frunistra.fr

Accueil | Université de Strasbourg

test

Title Length34 chars

Recommended: 50-60 chars

Description Length4 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (25/35)

5 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

3 URLs

robots.txt

73 rules

Sponsored

Security Score

66%Fair

Interactive

HTTPS

No WAF

236d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

09.10.2025

Valid Until

09.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

*.unistra.fr

SHA-256 Fingerprint

08:55:CD:78:9C:33:6C:3F:B1:CB:50:CB:89:F8:5A:B9:B1:94:4B:44...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=2592000

cache-control

🔵 1 Days(max-age=86400, public)

content-encoding

📦 Gzip(gzip)

content-language

content-security-policy-report-only

object-src 'none'; script-src 'self' 'report-sample' 'unsafe...

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (6)

mxb.relay.renater.fr

mx2.relay.renater.fr

mxa.relay.renater.fr

mxc.relay.renater.fr

+2 more

Domain Information

unistra.fr

Domain Age

18y 7m

Created

24.07.2007

Expires

02.07.2026

Last Updated

18.11.2025

Registrar

GIP RENATER

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

Typography & Readability

Unistra A

80/100

Readability

/30

32/40

22px · LH 1.20

Hierarchy

/20

25/25

2.18x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Unistra A

Sans48px

Body Font

Unistra A

Sans22px

Contrast Ratio

Reading Comfort

Single Font Family

left aligned

48px

32px

22px

✅ Excellent readability: 22px body text is ideal for all devices.

✅ Strong hierarchy: Headlines are 2.2x 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.

⚠️ Cramped layout: 50 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Growing

Behavior Analytics

HotjarMid-Market

Matomo (Piwik)Mid-Market

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

16 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(11)webomat.unistra.fr(1)static.hotjar.com(1)script.hotjar.com(1)

Website Identity

Facebook Instagram Bluesky

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Last analyzed: 15 Feb 2026 at 07:01

Historical Analysis & Change Tracking