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

slatestarcodex.com

https://slatestarcodex.com· First analyzed 18 Feb 2026· Updated 18 Feb 2026

Export

slatestarcodex.com

Sponsored

Hosting Provider

Google Cloud Platform

cloud.google.com

IP Address

35.185.13.110

Server Location

🇺🇸 North Charleston, United States

ASN

AS396982

Organization

Google Cloud (us-east1)

Server

Nginx

CDN

Nameservers

ns-1139.awsdns-14.org.ns-1917.awsdns-47.co.uk.ns-31.awsdns-03.com.ns-792.awsdns-35.net.

Performance

Page Speed

1.2 MB

49 requests

Image Optimization

Responsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.8.3

cms

responsive-pujugama-v3Custom

Technology Stack

11 Technologies Detected

Plugins

Wm Simple Captcha Wp Hide Post Page Links To Crowd Control

Libraries

Other

CSS Frameworks

Icon Libraries

Fonts

Web Servers

SEO Analysis

D50/100

slatestarcodex.comslatestarcodex.com

Slate Star Codex

No description available for this page.

Title Length16 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description - important for click-through rates
• Many images missing alt text (22/23)

5 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

Sponsored

Security Score

71%Good

Static / Informational

HTTPS

No WAF

59d

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

18.01.2026

Valid Until

18.04.2026

Subject Alternative Names (1)

slatestarcodex.com

SHA-256 Fingerprint

65:9B:52:0E:93:98:DB:8E:3E:0F:73:B0:6E:B5:F0:89:52:39:88:A0...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 600s(max-age=600, must-revalidate)

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=UTF-8

date

Wed, 18 Feb 2026 08:40:41 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

link

<https://slatestarcodex.com/wp-json/>; rel="https://api.w.or...

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mail.trikeapps.com

Domain Information

slatestarcodex.com

Domain Age

13 years

Created

06.02.2013

Expires

06.02.2027

Last Updated

22.01.2026

Registrar

Launchpad.com Inc.

DNSSEC

Not Enabled

Typography & Readability

Raleway + Verdana

63/100

Readability

/30

20/40

12px · LH 1.67

Hierarchy

/20

18/25

5.33x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

10/20

3 fonts

Heading Font

Raleway

Sans64px

Body Font

Verdana

Sans12px

Contrast Ratio

Reading Comfort

~60 CPL

Optimal (45–75)

64px

16px

12px

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

✅ Optimal line spacing: 1.67 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 5.3x larger than body text.

✅ Protected text on images: Using gradient for readability.

✅ Optimal line length: ~60 characters per line is comfortable to read.

✅ Clean layout: Consistent left alignment throughout.

GGoogle Fonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Social Media

Twitter/X WidgetsFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

22 Resources

Scripts

Styles

Async

Defer

Top Script Sources

slatestarcodex.com(6)c0.wp.com(2)platform.twitter.com(2)polyfill.io(1)stats.wp.com(1)

Website Identity

X (Twitter)Discord Reddit

Sponsored

Last analyzed: 18 Feb 2026 at 08:40

Historical Analysis & Change Tracking