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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biorxiv.org

https://biorxiv.org· First analyzed 11 Feb 2026· Updated 11 Feb 2026

Export

biorxiv.org

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

188.114.96.3

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

CloudFlare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

jen.ns.cloudflare.com.vin.ns.cloudflare.com.

Performance

Page Speed

207 KB

21 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Drupalv7

Technology Stack

8 Technologies Detected

Analytics

Libraries

Other

CSS Frameworks

Icon Libraries

Tag Managers

CDN

SEO Analysis

D58/100

biorxiv.orgbiorxiv.org

bioRxiv.org - the preprint server for Biology

bioRxiv - the preprint server for biology, operated by Cold Spring Harbor Laboratory, a research and educational institution

Title Length45 chars

Recommended: 50-60 chars

Description Length124 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag - every page should have one H1

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

155 rules

Sponsored

Security Score

46%Poor

Interactive

HTTPS

WAF

54d

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

06.01.2026

Valid Until

06.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.biorxiv.org*.www.biorxiv.org

SHA-256 Fingerprint

8C:AF:A6:65:B5:C2:AB:86:AC:96:B6:E4:33:97:20:49:E7:83:22:F4...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

age

cache-control

🟡 0s(public, max-age=0, must-revalidate, proxy-revalidate, pre-ch...)

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9cc40fa7be00d2db-FRA

content-encoding

📦 Gzip(gzip)

content-language

Good Warning Issue

Email Infrastructure

Mimecast

Score

SPF

DKIM

DMARC

MX Records (2)

usb-smtp-inbound-1.mimecast.com

usb-smtp-inbound-2.mimecast.com

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

Typography & Readability

Helvetica Neue + GillSansRegular

85/100

Readability

/30

32/40

14px · LH 1.50

Hierarchy

/20

25/25

2x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Helvetica Neue

Sans28px

Body Font

GillSansRegular

Sans14px

Contrast Ratio

Reading Comfort

~46 CPL

Optimal (45–75)

28px

14px

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

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

✅ Optimal line length: ~46 characters per line is comfortable to read.

⚠️ Cramped layout: 6 elements lack adequate spacing.

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Social Media

DisqusFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

14 Resources

Scripts

Styles

Async

Defer

Top Script Sources

biorxiv.org(3)googletagmanager.com(2)rum-static.pingdom.net(1)d33xdlntwy0kbs.cloudfront.net(1)

Website Identity

biorxiv.org

📧 Mimecast

Sponsored

Last analyzed: 11 Feb 2026 at 13:06

Historical Analysis & Change Tracking