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

schneier.com

https://schneier.com· First analyzed 13 Feb 2026· Updated 13 Feb 2026

Export

schneier.com

Mobile

Sponsored

Hosting Provider

Pressable

pressable.com

IP Address

199.16.173.239

Server Location

🇺🇸 San Francisco, United States

ASN

AS2635

Organization

Pressable

Server

Nginx

Nameservers

ns79.worldnic.com.ns80.worldnic.com.

Performance

Page Speed

213 KB

42 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

Schneierv1.0

by WordPress Concierge

View Theme

Technology Stack

7 Technologies Detected

Plugins

Meta Frameworks

Libraries

CSS Frameworks

Web Servers

SEO Analysis

B76/100

schneier.comschneier.com

Schneier on Security -

No description available for this page.

Title Length22 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description - important for click-through rates

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

3 rules

Allows all crawlers

Sponsored

Security Score

41%Poor

Interactive

HTTPS

No WAF

88d

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

12.02.2026

Valid Until

13.05.2026

Subject Alternative Names (20)

bioillustrations.comblaugranadesign.comkeys-touch.comlascieriecreative.frlunavallefuocopoetry.comlyndsaymcdonaldviolinstudio.commissiontrailslax.commostlymothering.blog+12 more

SHA-256 Fingerprint

44:82:43:96:B5:63:CD:6F:9F:F2:92:3A:30:FF:41:34:FA:D9:27:0C...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

server

nginx

date

Fri, 13 Feb 2026 14:04:41 GMT

content-type

text/html; charset=UTF-8

strict-transport-security

max-age=31536000

last-modified

Fri, 13 Feb 2026 14:03:13 GMT

cache-control

🟡 226s(max-age=226, must-revalidate)

Good Warning Issue

Email Infrastructure

Rackspace Email

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

mx1.emailsrvr.com

mx2.emailsrvr.com

Domain Information

schneier.com

Domain Age

26y 9m

Created

22.05.1999

Expires

22.05.2029

Last Updated

10.07.2023

Registrar

Network Solutions, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

Typography & Readability

Helvetica

63/100

Readability

/30

20/40

13px · LH 1.40

Hierarchy

/20

25/25

3.85x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Helvetica

Sans50px

Body Font

Helvetica

Sans13px

Contrast Ratio

Reading Comfort

~83 CPL

Needs attention

50px

24px

18px

13px

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

✅ Optimal line spacing: 1.40 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 3.9x larger than body text.

✅ Good performance: Using 1 font families keeps load times fast.

✅ Consistent design: Single font family with weight variations is a modern best practice.

✅ Protected text on images: Using text-shadow for readability.

Buy on MyFonts

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

22 Resources

Scripts

Styles

Async

Defer

Top Script Sources

c0.wp.com(7)schneier.com(6)stats.wp.com(3)cdnjs.cloudflare.com(1)

Website Identity

Facebook X (Twitter)GitHub Bluesky

Sponsored

Last analyzed: 13 Feb 2026 at 14:04

Historical Analysis & Change Tracking