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

sohu.com

https://sohu.com· First analyzed 10 Feb 2026· Updated 10 Feb 2026

Export

sohu.com

Mobile

Sponsored

Hosting Provider

China Unicom Beijing Province Network

IP Address

61.135.164.50

Server Location

🇨🇳 Beijing, China

ASN

AS4808

Server

OpenResty

Nameservers

ns16.sohu.com.ns12.sohu.com.ns15.sohu.com.ns14.sohu.com.+2 more

Performance

Page Speed

841 KB

162 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

China Unicom Beijing Province Network

Technology Stack

4 Technologies Detected

Meta Frameworks

Libraries

CSS Frameworks

Web Servers

SEO Analysis

F29/100

sohu.comsohu.com

搜狐

No description available for this page.

Title Length2 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description - important for click-through rates
• Missing H1 tag - every page should have one H1

8 issues found

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Security Score

31%Critical

Interactive

HTTPS

No WAF

182d

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

cache-control

🟡 60s(max-age=60)

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-length

49838

content-type

text/html;charset=utf-8

Good Warning Issue

Typography & Readability

PingFang SC + 微软雅黑

16/100

Readability

/30

17/40

14px · LH 2.86

Hierarchy

/20

8/25

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

PingFang SC

Sans

Body Font

微软雅黑

Sans14px

Contrast Ratio

Reading Comfort

~179 CPL

Needs attention

14px

16px

14px

Major Second

Scale

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

⚠️ Wide line spacing (2.86). Consider 1.4-1.8 for better flow.

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

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

❌ Very long lines: ~179 chars/line causes eye strain. Use max-width: 65ch.

⚠️ Cramped layout: 76 elements lack adequate spacing.

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Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Advertising

TaboolaMid-Market

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

22 Resources

Scripts

Styles

Async

Defer

Top Script Sources

js.go.sohu.com(16)reke.at.sohu.com(2)cpro.baidustatic.com(1)pv.sohu.com(1)

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Last analyzed: 10 Feb 2026 at 22:15

Historical Analysis & Change Tracking