cancer.fr 59 D
🛡️ SEO 49 🤖 GEO 75 ⚡ Perf 33 🏗️ Arch 65

cancer.fr — Global SEODiff Score 59/100

cancer.fr
📊

cancer.fr shows strong AI visibility with an ACRI of 70/100, outperforming 67% of indexed domains. Compared to other infrastructure sites (avg score: 57), cancer.fr performs above the benchmark, suggesting strong competitive positioning in AI search. Content is delivered server-side, meaning bots and AI agents can parse the full page without executing JavaScript. A tight 2.4× token bloat ratio reflects disciplined markup: minimal noise between the crawler and the content it needs. The complete absence of JSON-LD schema is a missed opportunity: even basic Organization markup would improve how AI crawlers understand this domain. The site maintains an open-door policy for AI crawlers — GPTBot, ClaudeBot, and other major agents are all allowed.

59
D — Global SEODiff Score
Comprehensive search visibility assessment
Below average — Performance (33) has the most room for improvement.
🎯 Top Fix: Add Organization + WebSite JSON-LD → +5–8 pts
🔬 Automated SEODiff Assessment · Snapshot: Mar 20, 2026 · 📋 API
📈 ACRI Trend 8 snapshots
Feb 23 Mar 20
🔔 Recent AI Indexing Activity
🔄 Mar 20 Content change detected
🔄 Mar 18 Content change detected
📈 Mar 12 ACRI +1 (56→57)
Does your site score higher than cancer.fr?
Run the same 40-signal audit on your own domain — free, instant results.
Scan Your Site Free →
🧮 Score Transparency — How is this calculated?
🛡️ Traditional SEO (25% weight)49 × 0.25 = 12.2
🤖 AI Readiness / GEO (40% weight)75 × 0.40 = 30.0
⚡ Performance (20% weight)33 × 0.20 = 6.6
🏗️ Architecture & Trust (15% weight)65 × 0.15 = 9.8
Weighted sum = 12.2 + 30.0 + 6.6 + 9.8
Global SEODiff Score = 59 (D)
📊 ACRI Sub-Scores (AI Readiness Detail)
100
Bot Access
avg 92
99
Rendering
avg 93
51
Structure
avg 35
0
Schema
avg 9
50
Tech Stack
avg 63
🔀
Visibility Delta: Google vs AI
Google (Tranco)
Top 10%
Rank #96214
+24 pts
Gap
AI (ACRI)
Top 33%
Score 70/100

cancer.fr punches above its weight in AI — AI visibility exceeds Google ranking. This is a competitive moat worth protecting. ACRI measures technical crawler readiness. Read the methodology →

Why cancer.fr ranks here

Tech stackCustom / Proprietary
RenderingSSR
Schema coverage0 blocks
Token bloat2.4×

Fastest improvements

  • Add basic Organization and WebSite JSON-LD to fix “0 schema blocks” (see Schema Coverage).
  • Create an llms.txt file so AI crawlers can discover your content structure without heavy crawling. Generate llms.txt →
  • Run a full entropy audit to find which DOM regions waste the most tokens. Run Entropy Audit →
🧪

JavaScript Rendering Check

We check what AI crawlers miss when they skip JavaScript execution.

Running headless browser to simulate AI extraction…
🛡️

Traditional SEO

49/100 25 % of Global Score 🟢 High Confidence

📝 Title Tag

27 chars
Too short

Optimal range: 30–60 characters for SERP display.

📋 Meta Description

175 chars
Too long

Optimal range: 120–160 characters for snippet control.

🔤 Heading Hierarchy

  • ✓ Exactly 1 <h1> tag — found 1
  • ✓ Has <h2> headings — found 21
  • ✓ <h2> not before <h1>

🔍 Indexability

  • ✓ Canonical tag present → https://www.cancer.fr/
  • ✓ No noindex directive
  • ✓ Meta viewport set
  • ✓ HTML lang attribute → fr-FR
  • ✅ Hreflang tags
  • ✓ Googlebot allowed by robots.txt

🌐 Social / OpenGraph

  • ✓ og:title — Accueil
  • ✗ og:description
  • ✓ og:image — preview
  • ✓ twitter:card — summary
📐 How the SEO Pillar score is calculated

SEO Pillar = Title (20 pts) + Meta Desc (20 pts) + Heading Hierarchy (20 pts) + Indexability (20 pts) + Social/OG (20 pts)

Each sub-score is derived from the checks above. Canonical tag, lang attribute, og:image, and a single H1 are the highest-impact items.

🤖

AI Readiness / GEO

75/100 40 % of Global Score 🟢 High Confidence

This pillar aggregates citation share, hallucination risk, bot access, schema health, and content extractability. The individual diagnostic sections below contribute to this score.

🔗

Citation Alternatives

Research
💡
Insight: In the infrastructure sector, safely.co.jp (ACRI: 90) currently has stronger AI extractability. AI models tend to prefer sources with higher semantic structure and schema coverage. Domains with ACRI < 40 see 3.5× more hallucinations. Read the research →
cancer.fr
57
Your ACRI Score
90
Industry Peer ACRI
AI models prioritize pages with strong semantic structure and schema coverage. safely.co.jp has schema coverage of 3 blocks and uses WordPress. Improve your score by implementing the remediation patches below.
📊 Side-by-Side Comparison →
🚨

Hallucination Risk

Research

Is AI lying about your brand? This panel measures how likely LLMs are to hallucinate facts when extracting information from your page.

Analyzing hallucination risk…

🤖 Bot Access Matrix

GPTBot (OpenAI)
Allowed
ClaudeBot (Anthropic)
Allowed
CCBot (Common Crawl)
Allowed
Google-Extended
Allowed
Googlebot
Allowed

👻 Rendering (Ghost Ratio) Docs

Ghost Ratio 5%
0% — Safe 50% 100% — Risk
Status Server-Side Rendered (Safe)
Rendering Type SSR

📊 Structure & Information Density Docs

Structure Grade 51/100 — Fair
Structured Elements 439 elements (439 lists, 0 rows, 0 headers)
Total Words5649
Raw Density7.8%

🏷️ Schema Health Docs

Organization Schema ❌ Missing
Product / Service Schema ⚠️ Not Found
Total Schema Blocks0 — No JSON-LD detected

Schema Coverage Map

0/7 schema types detected
❌ Organization
❌ Product/Service
❌ Breadcrumb
❌ FAQ
❌ Article
❌ WebSite
💡Organization schema missing. AI models cannot identify your brand entity. Without it, your brand won't appear in Knowledge Panels or be associated with your content.
💡Product / Service schema missing. AI models don't know this is a SaaS product. Add Product or SoftwareApplication schema so AI understands what you offer and can surface pricing/features.
💡BreadcrumbList schema missing. AI cannot understand your site hierarchy or how pages relate to each other.
💡FAQ schema missing. Adding FAQPage schema lets AI models directly extract Q&A pairs for Featured Snippets and chatbot answers.
💡WebSite schema missing. Add WebSite + SearchAction so Google can generate a Sitelinks Search Box for your brand in AI results.

📐 AI Efficiency Metrics Docs

60
AI Extractability
Medium
Crawl Cost
None
Blocklist Risk
Extractability60/100 — AI models can partially extract answers from this page
Crawl CostMedium (50/100) — moderate for AI crawlers to process
Blocklist RiskNone — 0 of 5 AI crawlers blocked

Token Bloat Research

41%
🗑️ 59%
Useful Content (158.5 KB)Bloat (222.2 KB)
Token Bloat Ratio2.4× — Lean

Multimodal Readiness

Visual Context13% Optimized for Vision
Image Alt Coverage2 / 16 images have alt text

TDM Rights

TDM-Reservation HeaderNot set
X-Robots-Tag: noaiNot set
💡Only 13% of images have alt text. Add descriptive alt attributes so multimodal AI (ChatGPT Vision) can understand your images.

🔥 Structural Entropy Check Research

65 Entropy
Fair Token Bloat: Medium
Noise Ratio: 58.4% · SNR: 0.71 · Signal: 40568 / Noise: 56876 tokens

🔬 AI-Crawler Simulation

See your website the way AI crawlers do. CSS stripped, structure labeled, content chunked.

🌐
This is what humans see — styled, branded, visual.
Toggle to "AI Agent View" to see what GPTBot, ClaudeBot, and other AI crawlers actually extract from this page.
🤖

AI Answer Preview

NEW

See how AI models summarize your site. Left: your actual content. Right: what the LLM extracts and says about you.

Simulating AI extraction…
🧠

The LLM Interpretation

AI-VERIFIED

SEODiff AI analyzed the extracted content of cancer.fr and produced this structured business intelligence. Fields marked SEMANTIC VOID indicate information the AI could not find — a critical gap in your site’s machine-readability.

Core Offering
The website focuses on providing information and supporting patients undergoing CAR-T therapy, particularly through improved consent forms and patient-centric resources.
Target Audience
Patients with hematological malignancies, caregivers, healthcare professionals involved in CAR-T therapy, and patient advocacy groups.
Pricing Model
⚠ SEMANTIC VOID
🏆 Competitive Moat
Patient-centric approach and collaborative development of accessible consent forms and educational materials.
📊 Content Depth
6/10
🔄 Programmatic SEO Signals
Use of ‘CAR-T’ and ‘Informed Consent Form’ in URLs and page titlesLinks to research publications (Blood Advances)
⚡ Key Pain Points
• Complex and difficult-to-understand consent forms
• Lack of accessible patient information regarding CAR-T therapy risks and benefits
Analyzed by SEODiff AI · 2026-03-05

🔧 Tech Stack

AI-Readiness Score50/100
ServerApache
CDN
HTTP Status200
Load Time1235 ms
Raw HTML Size380.6 KB
Visible Text Size158.5 KB

Performance & Speed

33/100 20 % of Global Score 🟢 High Confidence

⏱️ Time to First Byte

1235 ms
Slow — bots may time out or deprioritise

Google considers <200 ms "good". AI crawlers may have even shorter timeouts.

📦 Page Weight

3126
DOM nodes
381 KB
HTML payload
Heavy page — consider reducing DOM complexity

🗄️ Cache & CDN

  • ✓ Cache-Control header → public, s-maxage=600, stale-while-revalidate=300, stale-if-error=300
  • ✗ CDN cache status
  • ✗ CDN detected

🔬 Tracker Tax

0
tracker scripts
0
third-party domains
0.0%
token overhead
Minimal tracker load — clean signal for bots
📐 How the Performance Pillar score is calculated

Perf Pillar = TTFB (35 pts) + Page Weight (25 pts) + Cache/CDN (20 pts) + Tracker Tax (20 pts)

TTFB <200 ms = full marks. DOM >3000 or payload >300 KB incurs heavy penalties. Tracker scripts beyond 5 reduce score.

🏗️

Architecture & Trust

65/100 15 % of Global Score 🟢 High Confidence

🗺️ Sitemap & Robots

  • ✗ Sitemap declared in robots.txt
  • ✓ Googlebot allowed
  • ✓ GPTBot allowed
  • ✓ ClaudeBot allowed

🔗 Linking

437
internal links
5
external links
Good internal linking — helps crawlers discover content

🔒 Security & Trust

  • ✓ HSTS header (Strict-Transport-Security)
  • ✗ Content-Security-Policy header
  • ✓ HTTP status 200 OK (got 200)

♿ Accessibility Signals

  • ✓ HTML lang attribute → fr-FR
  • ✓ Meta viewport for mobile
  • ✓ Single H1 for screen readers
📐 How the Architecture Pillar score is calculated

Arch Pillar = Sitemap & Robots (30 pts) + Linking (25 pts) + Security (25 pts) + Accessibility (20 pts)

Having a valid sitemap, allowing AI bots, HSTS, and a good internal link count are the highest-impact items.

🏅 AI-Verified Trust Badge

Your site scores 57/100. Reach 80+ to unlock the green "AI-Verified" badge. Fix the issues below to improve your score.

AI-Verified badge for cancer.fr
Pending Audit — score below 80 threshold
<a href="https://seodiff.io/radar/domains/cancer.fr" rel="noopener"><img src="https://seodiff.io/api/v1/badge?domain=cancer.fr" alt="AI-Verified by SEODiff" width="280" height="52"></a>

💡 Paste in your site footer, GitHub README, or email signature. Badge updates automatically as your score changes.

� Deep Crawl Analysis 49 pages · Deep-10

Homepage ACRI
57
Single-page score
-25
Severe hidden bloat
Δ delta
Site-Wide ACRI
32
Avg across 49 pages · Range 0–59
🔍
Hidden Bloat Detected

Homepage scores 57, but internal pages average only 32 — a -25-point gap. Blogs, docs, and legacy content are dragging down AI readability site-wide.

Topical Cohesion
16%
Topical Drift
TF-IDF cosine similarity
Total Words
5181
Avg Bloat
513.1×
Page Type ACRI Token Bloat Words Status
https://www.cancer.fr/actualites/car-t-cells-l-inca-presente-ses-travaux-au-congres-ebmt-eha-2026
Mieux informer et accompagner les patients traités par CAR-T : l’INCa présente ses travaux au congrès EBMT-EHA 2026
pricing 59 88.4× 681 💰 Pricing
https://www.cancer.fr/l-institut-national-du-cancer/s-engager-a-nos-cotes/les-collectivites-territoriales-et-la-prevention-des-cancers/espace-ressources/le-guide-isadora
Le guide ISadOrA
pricing 49 263.4× 224 💰 Pricing
https://www.cancer.fr/agenda/decoding-metabolic-states-in-pediatric-cancers-vulnerabilities-and-therapeutic-opportunities
International Symposium - Decoding Metabolic States in Pediatric Cancers: Vulnerabilities and Therapeutic Opportunities
pricing 49 164.2× 363 💰 Pricing
https://www.cancer.fr/agenda/journee-scientifique-du-cno-sur-le-cancer-colorectal
Journée scientifique du CNO sur le cancer colorectal
pricing 49 182.7× 328 💰 Pricing
https://www.cancer.fr/agenda/meeting-siop-rtsg-2026
Meeting SIOP-RTSG 2026
pricing 49 260.0× 227 💰 Pricing
https://www.cancer.fr/l-institut-national-du-cancer/s-engager-a-nos-cotes/les-collectivites-territoriales-et-la-prevention-des-cancers/espace-ressources/one-health-une-seule-sante
One health, une seule santé
pricing 39 367.8× 160 💰 Pricing
https://www.cancer.fr/l-institut-national-du-cancer/s-engager-a-nos-cotes/les-collectivites-territoriales-et-la-prevention-des-cancers/espace-ressources/urbanisme-et-sante
Urbanisme et santé : quel rôle pour les collectivités locales ?
pricing 39 426.5× 138 💰 Pricing
https://www.cancer.fr/l-institut-national-du-cancer/s-engager-a-nos-cotes/les-collectivites-territoriales-et-la-prevention-des-cancers/espace-ressources/je-fais-mon-depistage
Je fais mon dépistage - Tout savoir sur les dépistages des cancers et les réaliser
pricing 39 405.4× 145 💰 Pricing
https://www.cancer.fr/l-institut-national-du-cancer/s-engager-a-nos-cotes/les-collectivites-territoriales-et-la-prevention-des-cancers/espace-ressources/sante-bd
Santé BD
pricing 39 360.6× 163 💰 Pricing
https://www.cancer.fr/l-institut-national-du-cancer/s-engager-a-nos-cotes/les-collectivites-territoriales-et-la-prevention-des-cancers/espace-ressources/ufs
L’urbanisme favorable à la santé (UFS)
pricing 39 405.8× 145 💰 Pricing
https://www.cancer.fr/l-institut-national-du-cancer/s-engager-a-nos-cotes/les-collectivites-territoriales-et-la-prevention-des-cancers/espace-ressources/observer-les-territoires
Observer les territoires - Guide méthodologique pour des approches partagées au service des habitants du territoire
pricing 39 312.2× 189 💰 Pricing
https://www.cancer.fr/l-institut-national-du-cancer/s-engager-a-nos-cotes/les-collectivites-territoriales-et-la-prevention-des-cancers/espace-ressources/cancer-et-emploi
La boîte à outil "Cancer et emploi"
pricing 39 334.5× 176 💰 Pricing
https://www.cancer.fr/l-institut-national-du-cancer/s-engager-a-nos-cotes/les-collectivites-territoriales-et-la-prevention-des-cancers/espace-ressources/pour-une-transition-juste
Pour une transition juste : tenir compte des inégalités sociales de santé dans l’action climatique
pricing 39 314.2× 188 💰 Pricing
https://www.cancer.fr/personnes-malades/carte-des-prothesistes-capillaires/marie-florence
Institut national du cancer
pricing 39 922.2× 63 💰 Pricing
https://www.cancer.fr/personnes-malades/carte-des-etablissements-de-soins-en-cancerologie/clinique-les-orchidees
CLINIQUE LES ORCHIDEES
pricing 39 902.4× 64 💰 Pricing
https://www.cancer.fr/personnes-malades/carte-des-etablissements-de-soins-en-cancerologie/chu-de-martinique-site-mere-enfant
CHU DE MARTINIQUE SITE MERE ENFANT
pricing 39 874.4× 66 💰 Pricing
https://www.cancer.fr/personnes-malades/carte-des-etablissements-de-soins-en-cancerologie/centre-medico-social
CENTRE MEDICO SOCIAL
pricing 39 1087.6× 53 💰 Pricing
https://www.cancer.fr/personnes-malades/annuaire-des-associations-et-lieux-d-information/la-ligue-contre-le-cancer-comite-de-l-ardeche
La Ligue contre le Cancer - Comité de l'Ardèche
pricing 39 417.9× 142 💰 Pricing
https://www.cancer.fr/personnes-malades/annuaire-des-associations-et-lieux-d-information/ensemble-je-vais-mieux
Ensemble, je vais mieux
pricing 39 545.8× 107 💰 Pricing
https://www.cancer.fr/personnes-malades/carte-des-prothesistes-capillaires/pharmacie-internationale
Institut national du cancer
pricing 39 983.8× 59 💰 Pricing
Showing 20 of 49 pages. Unlock full subpage table →
📂
Health by Sub-Directory
Average ACRI and top issues aggregated by URL path prefix
Path Pages Avg ACRI Ghost % Bloat Top Issue
/personnes-malades/ 23 39 0% 869.6× High JS Bloat
/l-institut-national-du-cancer/ 12 40 0% 370.5× High JS Bloat
/agenda/ 3 49 0% 202.3× High JS Bloat
/faq/ 1 0 0% 0.0× Low AI Readiness
/products/ 1 0 0% 0.0× Low AI Readiness
/blog/ 1 0 0% 0.0× Low AI Readiness
/features/ 1 0 0% 0.0× Low AI Readiness
/case-studies/ 1 0 0% 0.0× Low AI Readiness
/docs/ 1 0 0% 0.0× Low AI Readiness
/contact/ 1 0 0% 0.0× Low AI Readiness
/integrations/ 1 0 0% 0.0× Low AI Readiness
/actualites/ 1 59 0% 88.4× High JS Bloat
/pricing/ 1 0 0% 0.0× Low AI Readiness
/about/ 1 0 0% 0.0× Low AI Readiness
🔗
Outbound External Citations
0 unique external domains cited across 49 pages
youtube.com ×39
linkedin.com ×39
facebook.com ×39
twitter.com ×39
instagram.com ×39
google.com ×23
ehesp.fr ×2
ashpublications.org ×1
🔄 Re-Crawl & Update 📡 Track this Domain

Scores update automatically each month. Create a free account for on-demand re-crawls (3/month free).

🔌 API Access

Pull this data programmatically. All sub-page metrics are available via our public API.

curl https://seodiff.io/api/v1/deep10/domain/cancer.fr

Get your free API key — 100 requests/month included.

🔗 Similar infrastructure Sites

Domains with a similar tech stack, industry, and AI readiness profile to cancer.fr. Compare side-by-side.

Domain ACRI AI Score Tech Stack Token Bloat Schema
cancer.fr (this site) 57 70 Custom / Proprietary 2.4× 0
pylonport.bandainamcomusiclive.co.jp 82 86 Custom / Proprietary 2.8× 1 Compare →
ciawifi.ru 82 86 Custom / Proprietary 2.5× 2 Compare →
anatel.gov.br 82 86 Custom / Proprietary 2.3× 2 Compare →
rexlondontrade.com 82 86 Custom / Proprietary 2.7× 2 Compare →
tophosts.net 82 90 Custom / Proprietary 1.4× 2 Compare →
Compare All 5 Similar Sites →

📊 Semantic Share of Voice

How often would an AI cite cancer.fr when users ask about topics in this domain's niche? We run entity queries through our 188k-page search index and measure citation probability.

Analyzing citation landscape…

🩹

Remediation Patches

COPY-PASTE

Auto-generated code fixes tailored to cancer.fr. Copy and paste these into your codebase to improve AI visibility. These patches are mathematically proven to increase extraction accuracy →

Add Organization JSON-LD
High Impact ⏱ 5 min
AI models cannot identify your brand entity without Organization schema. This is the #1 fix for AI visibility.
html
<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "Organization",
  "name": "Cancer",
  "url": "https://cancer.fr",
  "logo": "https://cancer.fr/assets/themes/ecancer/images/favicon.ico",
  "sameAs": []
}
</script>
Add WebSite + SearchAction JSON-LD
High Impact ⏱ 5 min
Enables the Sitelinks Search Box in Google and allows AI to understand your site structure.
html
<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "WebSite",
  "name": "Cancer",
  "url": "https://cancer.fr",
  "potentialAction": {
    "@type": "SearchAction",
    "target": "https://cancer.fr/search?q={search_term_string}",
    "query-input": "required name=search_term_string"
  }
}
</script>
Add FAQ Schema
Medium Impact ⏱ 10 min
FAQ schema lets AI models directly extract Q&A pairs. This is the easiest way to get featured in AI responses.
html
<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "FAQPage",
  "mainEntity": [
    {
      "@type": "Question",
      "name": "What is Cancer?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Add your answer here — describe what Cancer does in 1-2 sentences."
      }
    },
    {
      "@type": "Question",
      "name": "How does Cancer work?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Explain the key features and how users interact with Cancer."
      }
    }
  ]
}
</script>
📈

Projected Impact

ROI EST.

If you apply the patches above, here's the estimated improvement for cancer.fr:

Current Score
70
Projected Score
83
Improvement
+13 pts
Add Organization schema +6 pts
Add WebSite schema +4 pts
Add FAQ schema +3 pts

*Estimates based on SEODiff's scoring model. Actual results depend on implementation quality.

📋 Data Export

Download scores and metadata for audits, client reports, or CI/CD pipelines. Exports contain computed metrics only (no copyrighted content).

All data is generated automatically and updated with each crawl. JSON exports contain scores and metadata only (no copyrighted content).

Is this your company?

Monitor your AI visibility score weekly and get alerted when changes happen.

Start Free →

🧭 Self-Diffing (Private Layer)

For owned domains, combine this world snapshot with private drift + regression history.
Template Drift
Track in My Site
Drift → Traffic Impact
In development coming soon
Regression Incidents
Track in My Site
Internal Linking
Deep Audit graph
Semantic Structure
GEO view in Deep Audit
Content Quality
Thin/duplicate tracking

🕒 History

Score over timeAvailable in My Site history
Drift eventsTemplate timeline + incidents
Drift → Revenue AttributionComing soon
Schema/rendering/extractability changesTracked per scan in project history
🔍 Found indexing issues?
Run a free deep audit to diagnose crawled-not-indexed, soft 404s, redirect errors, and more.
Free Deep Audit → GSC Error Guide →