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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allthatsinteresting.com

https://allthatsinteresting.com· First analyzed 16 Feb 2026· Updated 16 Feb 2026

Export

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

172.67.72.212

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

grace.ns.cloudflare.com.brett.ns.cloudflare.com.

Performance

Page Speed

2.5 MB

97 requests

Image Optimization

WebPResponsive

0–49

50–89

90–100

Architecture Stack

Headless

⚙️ SSR

Decoupled

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Progressive Web App

Web Manifest

Detected API Sources

https://cdn.id5-sync.com/api/1...

Technology Stack

16 Technologies Detected

Plugins

Pbh Common Gif Dog Url Shortify Wp Email Wp Google Search

CSS Frameworks

Meta Frameworks

Libraries

UI Components

Icon Libraries

Fonts

Analytics

Advertising

CDN

SEO Analysis

B76/100

allthatsinteresting.comallthatsinteresting.com

All That's Interesting, Something Interesting To Read Every Day

Dig into history, science, true crime, and beyond with All That's Interesting — where you'll discover the most interesting things on the internet.

Title Length63 chars

Recommended: 50-60 chars

Description Length146 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (31/32)

3 issues found

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Crawlability

Sitemap

Type: standard

robots.txt

1 rules

Allows all crawlers

Sponsored

Security Score

26%Critical

Interactive

HTTPS

WAF

31d

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+H3

Valid From

19.12.2025

Valid Until

19.03.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

allthatsinteresting.com*.allthatsinteresting.com

SHA-256 Fingerprint

95:05:40:95:A2:F6:17:C0:0A:AD:D9:2D:FE:B4:DE:E7:CC:6E:67:6C...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

date

Mon, 16 Feb 2026 14:15:49 GMT

content-type

text/html; charset=UTF-8

server

cloudflare

x-prefix

/vhosts/

x-ab-group

control

cache-control

🟡 1 Hours(max-age=3600)

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (5)

aspmx3.googlemail.com

alt1.aspmx.l.google.com

aspmx.l.google.com

alt2.aspmx.l.google.com

+1 more

Domain Information

allthatsinteresting.com

Domain Age

10y 1m

Created

18.01.2016

Expires

18.01.2034

Last Updated

03.05.2024

Registrar

Tucows Domains Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Libre Baskerville + Work Sans

72/100

Readability

/30

20/40

13px · LH 1.60

Hierarchy

/20

25/25

2.16x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

17/20

System fonts

Heading Font

Libre Baskerville

Serif27px

Body Font

Work Sans

Sans13px

Contrast Ratio

Reading Comfort

Serif Headlines + Sans Body

left aligned

27px

13px

❌ Critical: 12px body text is too small. Increase to at least 14px.

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.2x larger than body text.

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

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

⚠️ Cramped layout: 8 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

29 Resources

Scripts

Styles

Async

Defer

Top Script Sources

allthatsinteresting.com(18)cdn.id5-sync.com(1)google.com(1)

Website Identity

allthatsinteresting.com

10 years old

Tucows Domains Inc.📧 Google Workspace

Social Profiles

Instagram

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Last analyzed: 16 Feb 2026 at 14:16

Historical Analysis & Change Tracking