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

inserm.fr

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

Export

inserm.fr

Mobile

Sponsored

Hosting Provider

Scaleway

scaleway.com

IP Address

51.158.55.228

Server Location

🇫🇷 Paris, France

ASN

AS12876

Organization

ONLINE

Server

LiteSpeed

Nameservers

ns2.inserm.fr.ns1.inserm.fr.ns3.inserm.fr.

Performance

Page Speed

46 requests

Image Optimization

Lazy LoadWebPResponsiveBunny Optimizer

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

Insermv1.1.0

by BeAPI

View Theme

Technology Stack

6 Technologies Detected

Plugins

Libraries

CSS Frameworks

Icon Libraries

Web Servers

SEO Analysis

C64/100

inserm.frinserm.fr

Institut national de la santé et de la recherche médicale · Inserm,...

L'Inserm est un organisme de recherche scientifique public dédié à la santé humaine. Notre objectif : améliorer la santé par le progrès des connaissances sur...

Title truncated. Description truncated.

Title Length92 chars

Recommended: 50-60 chars

Description Length253 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag - every page should have one H1
• Many images missing alt text (14/21)

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

6 URLs

robots.txt

27 rules

Sitemap reference found

Sponsored

A+

Security Score

95%Excellent

Interactive

HTTPS

No WAF

143d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

08.07.2025

Valid Until

08.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (4)

www.inserm.frinserm.frwww.inserm.euinserm.eu

SHA-256 Fingerprint

4A:2C:95:20:66:C0:01:C9:DF:69:FF:F7:C8:40:79:91:7C:B7:58:86...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-headers

Content-Type, Authorization

access-control-allow-methods

GET,POST

content-encoding

⚡ Brotli(br)

content-length

24661

content-security-policy

upgrade-insecure-requests;

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 (2)

ins-par6-b11-fml1.inserm.fr

ins-mly-a317-fml1.inserm.fr

Domain Information

inserm.fr

Domain Age

31y 1m

Created

31.12.1994

Expires

31.12.2026

Last Updated

31.01.2026

Registrar

GIP RENATER

DNSSEC

Not Enabled

Typography & Readability

Open Sans + sans-serif

63/100

Readability

/30

32/40

14px · LH 1.75

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Open Sans

Sans

Body Font

sans-serif

Sans14px

Contrast Ratio

Reading Comfort

~44 CPL

Needs attention

30px

18px

14px

⚠️ Small text: 14px may be hard to read on mobile. Consider 16px+.

✅ Optimal line spacing: 1.75 ratio ensures comfortable reading.

✅ 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: 50 elements lack adequate spacing.

✅ Clean layout: Consistent left alignment throughout.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

PlausibleSMB

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

(13)inserm.b-cdn.net(6)inserm.fr(1)

Website Identity

Facebook Instagram LinkedIn YouTube Bluesky

Sponsored

Last analyzed: 15 Feb 2026 at 11:02

Historical Analysis & Change Tracking