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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sutori.com

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

Export

sutori.com

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

172.67.70.44

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

amy.ns.cloudflare.com.ben.ns.cloudflare.com.

Performance

Page Speed

255 KB

38 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Technology Stack

12 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel Amplitude

Libraries

CSS Frameworks

Fonts

Tag Managers

Customer Support

Payments

Social

CDN

SEO Analysis

A+100/100

sutori.comsutori.com

Presentations for the classroom | Sutori

Sutori is a timeline tool for the K-12 history and social studies classroom. Sign up for free for full access to all features.

Title Length40 chars

Recommended: 50-60 chars

Description Length126 chars

Recommended: 120-160 chars

Sponsored

Security Score

35%Critical

Critical / Transactional

HTTPS

WAF

87d

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

15.02.2026

Valid Until

16.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

sutori.com*.sutori.com

SHA-256 Fingerprint

AD:59:3A:3D:6F:3E:64:B7:50:10:C0:EC:DC:FC:0E:8E:A6:65:A5:13...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 0s(max-age=0, private, must-revalidate)

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9cfb83e41a0b365d-FRA

content-encoding

⚡ Brotli(br)

content-security-policy-report-only

default-src 'self' www.youtube.com *.stripe.com *.addthis.co...

content-type

text/html; charset=utf-8

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (5)

alt4.aspmx.l.google.com

alt2.aspmx.l.google.com

alt3.aspmx.l.google.com

aspmx.l.google.com

+1 more

Domain Information

sutori.com

Domain Age

19y 10m

Created

04.04.2006

Expires

01.01.2027

Last Updated

01.12.2025

Registrar

DreamHost, LLC

DNSSEC

Not Enabled

Privacy & Compliance

iubenda

Cookie Consent Banner

iubenda

GDPR Indicators

Cookie consent banner detected

CMP: iubenda

Typography & Readability

Helvetica Neue

47/100

Readability

/30

24/40

14px · LH 1.37

Hierarchy

/20

25/25

3.86x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Helvetica Neue

Sans54px

Body Font

Helvetica Neue

Sans14px

Contrast Ratio

Reading Comfort

~35 CPL

Needs attention

54px

40px

16px

14px

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

✅ 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.

⚠️ Risky: Text appears on background images without overlay protection.

⚠️ Cramped layout: 31 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

15 Resources

Scripts

Styles

Async

Defer

Top Script Sources

assets.sutori.com(5)youtube.com(2)apis.google.com(2)googletagmanager.com(1)js.stripe.com(1)

Website Identity

YouTube

Sponsored

Last analyzed: 18 Feb 2026 at 06:37

Historical Analysis & Change Tracking