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

openedition.org

https://openedition.org· First analyzed 12 Feb 2026· Updated 12 Feb 2026

Export

openedition.org

Mobile

Sponsored

Hosting Provider

CNRS Centre de Calcul de l'IN2P3

IP Address

134.158.39.138

Server Location

🇫🇷 Villeurbanne, France

ASN

AS789

Organization

CNRS Centre de Calcul de l'IN2P3

Nameservers

ns6.gandi.net.ccoe130.in2p3.fr.ccoe129.in2p3.fr.ns4.cnrs.fr.

Performance

Page Speed

167 KB

42 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

CNRS Centre de Calcul de l'IN2P3

Technology Stack

5 Technologies Detected

Libraries

CSS Frameworks

Analytics

SEO Analysis

D52/100

openedition.orgopenedition.org

OpenEdition: four platforms for electronic resources in the humanit...

OpenEdition gathers OpenEdition Books, OpenEdition Journals, Hypotheses.org and Calenda, four platforms dedicated to electronic resources in the humanities a...

Title truncated. Description truncated.

Title Length152 chars

Recommended: 50-60 chars

Description Length328 chars

Recommended: 120-160 chars

Issues (0)

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

5 rules

Sitemap reference found

Sponsored

Security Score

36%Critical

Interactive

HTTPS

No WAF

42d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

26.12.2025

Valid Until

26.03.2026

Subject Alternative Names (2)

*.openedition.orgopenedition.org

SHA-256 Fingerprint

03:31:63:11:27:DD:F0:D8:EB:D2:FC:B5:25:A7:E3:EB:63:C4:03:CA...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

age

12886

content-encoding

📦 Gzip(gzip)

content-length

34878

content-type

text/html; charset=UTF-8

strict-transport-security

max-age=0

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (5)

ASPMX3.GOOGLEMAIL.COM

ASPMX2.GOOGLEMAIL.COM

ALT2.ASPMX.L.GOOGLE.COM

ASPMX.L.GOOGLE.COM

+1 more

Domain Information

openedition.org

Domain Age

15y 6m

Created

13.08.2010

Expires

13.08.2027

Last Updated

14.09.2025

Registrar

Gandi SAS

DNSSEC

Not Enabled

Typography & Readability

Asap + serif

55/100

Readability

/30

20/40

13px · LH 1.60

Hierarchy

/20

8/25

1.15x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

17/20

System fonts

Heading Font

Asap

Sans15px

Body Font

serif

Serif13px

Contrast Ratio

Reading Comfort

~50 CPL

Optimal (45–75)

15px

13px

❌ Critical: 13px body text is too small. Increase to at least 14px.

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

✅ Protected text on images: Using gradient for readability.

✅ Optimal line length: ~50 characters per line is comfortable to read.

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Matomo (Piwik)Mid-Market

User behavior and product analytics

Sponsored

Scripts & Styles

21 Resources

Scripts

Styles

Async

Defer

Top Script Sources

static.openedition.org(11)analytics.openedition.org(1)

Website Identity

Facebook X (Twitter)LinkedIn Bluesky

Sponsored

Last analyzed: 12 Feb 2026 at 13:24

Historical Analysis & Change Tracking