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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anobii.com

https://anobii.com· First analyzed 15 Feb 2026· Updated 15 Feb 2026

Export

anobii.com

Mobile

Sponsored

Hosting Provider

DigitalOcean

digitalocean.com

IP Address

139.59.205.191

Server Location

🇩🇪 Frankfurt am Main, Germany

ASN

AS14061

Organization

DigitalOcean, LLC

Server

anobii-front-end/5.35.0

Nameservers

ns3.digitalocean.com.ns2.digitalocean.com.ns1.digitalocean.com.

Performance

Page Speed

1.7 MB

80 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

Progressive Web App

Web ManifestTheme Color

Technology Stack

18 Technologies Detected

Advertising

Google Ads Google AdSense Criteo Taboola Outbrain

Analytics

Frameworks

Icon Libraries

Font Awesome Material Icons

CSS Frameworks

Fonts

Payments

Social

Comments

Personalization

SEO Analysis

B74/100

anobii.comanobii.com

Share your passion for books - Anobii

Anobii is the social network for book lovers. Sign up, discover new and old books, write your reviews and meet millions of fellow book lovers from around the...

Description truncated.

Title Length37 chars

Recommended: 50-60 chars

Description Length164 chars

Recommended: 120-160 chars

Issues (0)

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

robots.txt

70 rules

Sitemap reference found

Sponsored

Security Score

70%Good

Critical / Transactional

HTTPS

No WAF

66d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

22.01.2026

Valid Until

22.04.2026

Subject Alternative Names (2)

anobii.comwww.anobii.com

SHA-256 Fingerprint

4C:11:3D:C6:9D:81:6C:C2:9D:B0:B5:0A:AB:CA:5E:C9:46:43:3B:18...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400, h3-29=":443"; ma=86400

cache-control

🟡 0s(public, max-age=0)

content-encoding

📦 Gzip(gzip)

content-security-policy

default-src 'self' *.anobii.com;script-src 'self' localhost:...

content-type

text/html; charset=UTF-8

cross-origin-resource-policy

same-origin

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

fb.mail.gandi.net

spool.mail.gandi.net

Domain Information

anobii.com

Domain Age

20y 5m

Created

26.08.2005

Expires

26.08.2026

Last Updated

25.07.2025

Registrar

Gandi SAS

DNSSEC

Not Enabled

Privacy & Compliance

iubenda

Cookie Consent Banner

iubenda

GDPR Indicators

Cookie consent banner detected

CMP: iubenda

Data Protection Officer mentioned

Legitimate interest basis mentioned

Typography & Readability

Open Sans + system-ui

91/100

Readability

/30

40/40

20px · LH 1.50

Hierarchy

/20

21/25

2x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Open Sans

Sans40px

Body Font

system-ui

Sans20px

Contrast Ratio

Reading Comfort

~37 CPL

Needs attention

40px

14px

20px

✅ Excellent readability: 20px body text is ideal for all devices.

✅ 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).

✅ 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.

GGoogle Fonts

Business & Marketing Stack

7 Tools Detected

Enterprise

Behavior Analytics

Google AnalyticsFree

PlausibleSMB

Google Tag ManagerFree

User behavior and product analytics

Advertising

Google AdsEnterprise

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Social Media

Facebook SDKFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

16 Resources

Scripts

Styles

Async

Defer

Top Script Sources

connect.facebook.net(2)securepubads.g.doubleclick.net(2)fundingchoicesmessages.google.com(2)pagead2.googlesyndication.com(1)analytics.anobii.com(1)

Website Identity

anobii.com

20 years old

Gandi SAS

Social Profiles

Facebook X (Twitter)Instagram

Sponsored

Last analyzed: 15 Feb 2026 at 09:53

Historical Analysis & Change Tracking