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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customink.com

https://customink.com· First analyzed 20 Feb 2026· Updated 20 Feb 2026

Export

customink.com

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

3.164.206.88

Server Location

🇫🇮 Helsinki, Finland

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

Nginx

CDN

CloudFront

Nameservers

ns-1306.awsdns-35.org.ns-1539.awsdns-00.co.uk.ns-20.awsdns-02.com.ns-800.awsdns-36.net.

Performance

Page Speed

2.6 MB

128 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Amazon Web Services (AWS)

CDN

CloudFront

Technology Stack

9 Technologies Detected

Analytics

Customer Support

Libraries

CSS Frameworks

Tag Managers

Email Marketing

Web Servers

SEO Analysis

A88/100

customink.comcustomink.com

Custom Ink - Design Custom T-shirts, Apparel & Promo Products Online

Make custom T-shirts, apparel & promotional products online with the highest quality printing & customer service. Easy Ordering. Fast & Free Shipping.

Title Length68 chars

Recommended: 50-60 chars

Description Length150 chars

Recommended: 120-160 chars

Issues (0)

2 issues found

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Crawlability

Sitemap

Type: standard

447 URLs

robots.txt

62 rules

Sitemap reference found

Sponsored

Security Score

61%Fair

Interactive

HTTPS

No WAF

294d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

13.11.2025

Valid Until

11.12.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.customink.comcustomink.com

SHA-256 Fingerprint

3B:FD:EB:11:EF:6A:1D:D2:64:84:52:87:C7:77:6E:D7:3C:6D:42:48...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

age

111058

cache-control

🟡 1 Hours(max-age=3600, public, stale-while-revalidate=2592000, stale-...)

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

date

Thu, 19 Feb 2026 02:19:48 GMT

etag

W/"17f90351719374f38e2f0a6aee3963fc"

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (5)

aspmx.l.google.com

aspmx2.googlemail.com

aspmx3.googlemail.com

alt1.aspmx.l.google.com

+1 more

Domain Information

customink.com

Domain Age

26y 11m

Created

17.03.1999

Expires

17.03.2030

Last Updated

13.01.2026

Registrar

MarkMonitor Inc.

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Typography & Readability

SharpSans + -apple-system

58/100

Readability

/30

32/40

14px · LH 1.50

Hierarchy

/20

25/25

5.14x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

SharpSans

Sans72px

Body Font

-apple-system

Sans14px

Contrast Ratio

Reading Comfort

~37 CPL

Needs attention

72px

20px

16px

24px

14px

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 5.1x larger than body text.

✅ Good performance: Using 2 font families keeps load times fast.

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

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

Buy on MyFonts

Business & Marketing Stack

6 Tools Detected

Enterprise

Marketing Automation

KlaviyoE-commerce

Email marketing and automation platforms

Customer Support

LiveChatMid-Market

Live chat and helpdesk tools

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

A/B Testing & Optimization

OptimizelyEnterprise

Experimentation and conversion optimization

Sponsored

Scripts & Styles

23 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(7)customink.com(4)google-analytics.com(3)pigment-cdn.customink.com(2)cdn.cookielaw.org(1)

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Last analyzed: 20 Feb 2026 at 09:10

Historical Analysis & Change Tracking