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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pf.kakao.com

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

Export

pf.kakao.com

Mobile

Sponsored

Hosting Provider

KAKAO

IP Address

121.53.104.166

Server Location

🇰🇷 Seongnam-si, South Korea

ASN

AS38099

Organization

KAKAO

Performance

Page Speed

675 KB

50 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

KAKAO

SEO Analysis

D47/100

pf.kakao.compf.kakao.com

카카오톡채널

No description available for this page.

Title Length6 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description - important for click-through rates

6 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

2 rules

Allows all crawlers

Sponsored

Security Score

76%Good

Static / Informational

HTTPS

No WAF

228d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-384 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

01.09.2025

Valid Until

29.09.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.kakao.comkakao.com

SHA-256 Fingerprint

66:26:ED:BA:8D:9C:E8:30:B1:CE:43:91:F9:46:FE:ED:BA:6F:FE:8A...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-origin

cache-control

🔴 No Cache(no-cache, no-store, no-cache, must-revalidate)

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

date

Fri, 13 Feb 2026 17:57:47 GMT

expires

Thu, 01 Jan 1970 00:00:01 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

pf.kakao.com

Domain Age

29y 1m

Created

29.12.1996

Expires

28.12.2026

Last Updated

17.12.2025

Registrar

Megazone Corp., dba HOSTING.KR

DNSSEC

Not Enabled

Typography & Readability

-apple-system

60/100

Readability

/30

12/40

11px · LH 1.36

Hierarchy

/20

18/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

-apple-system

Sans0

Body Font

-apple-system

Sans11px

Contrast Ratio

Reading Comfort

Single Font Family

left aligned

16px

21px

11px

❌ Critical: 11px body text is too small. Increase to at least 14px.

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

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

⚠️ Cramped layout: 7 elements lack adequate spacing.

✅ Clean layout: Consistent left alignment throughout.

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

8 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(2)t1.daumcdn.net(1)spi.maps.daum.net(1)tv.kakao.com(1)t1.kakaocdn.net(1)

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Last analyzed: 13 Feb 2026 at 17:58

Historical Analysis & Change Tracking