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

aliyun.com

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

Export

aliyun.com

Mobile

Sponsored

Hosting Provider

Alibaba Cloud

alibabacloud.com

IP Address

106.11.248.146

Server Location

🇨🇳 Hangzhou, China

ASN

AS37963

Organization

Zhejiang Taobao Network Co., Ltd

Server

Tengine

Nameservers

ns3.aliyun.com.ns5.aliyun.com.ns4.aliyun.com.

Performance

Page Speed

8.9 MB

166 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

React

Infrastructure

Hosting

Alibaba Cloud

Technology Stack

9 Technologies Detected

CSS Frameworks

Tailwind CSS

Ant Design

Advertising

TikTok Pixel Microsoft Advertising

Frameworks

Libraries

Other

Analytics

Web Servers

SEO Analysis

D58/100

aliyun.comaliyun.com

AI and Cloud Computing Services - Alibaba Cloud

Discover Alibaba Cloud's reliable cloud computing services for businesses of all sizes. Improve security and performance with our advanced cloud technologies.

Title Length47 chars

Recommended: 50-60 chars

Description Length158 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag - every page should have one H1
• Many images missing alt text (89/98)

4 issues found

Upgrade to view details

Sponsored

Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

206d

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

cache-control

🟡 60s(max-age=60,s-maxage=60)

content-encoding

📦 Gzip(gzip)

content-length

29530

content-type

text/html; charset=utf-8

date

Tue, 10 Feb 2026 20:53:40 GMT

Good Warning Issue

Typography & Readability

Helvetica Neue

50/100

Readability

/30

32/40

36px · LH 1.33

Hierarchy

/20

8/25

WCAG

/25

5/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Helvetica Neue

Sans

Body Font

Helvetica Neue

Sans36px

Contrast Ratio

Reading Comfort

Single Font Family

left aligned

18px

36px

✅ Excellent readability: 36px body text is ideal for all devices.

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

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

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

⚠️ Cramped layout: 10 elements lack adequate spacing.

✅ Clean layout: Consistent left alignment throughout.

Business & Marketing Stack

8 Tools Detected

Enterprise

Behavior Analytics

Google AnalyticsFree

Google Tag ManagerFree

User behavior and product analytics

Advertising

TikTok PixelMid-Market

Microsoft AdsEnterprise

Facebook PixelMid-Market

LinkedIn AdsEnterprise

Quora PixelMid-Market

Ad platforms and retargeting pixels

Privacy & Cookies

TrustArcEnterprise

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

28 Resources

Scripts

Styles

Async

Defer

Top Script Sources

g.alicdn.com(14)assets.alicdn.com(1)o.alicdn.com(1)analytics.tiktok.com(1)bat.bing.com(1)

Website Identity

aliyun.com

Sponsored

Last analyzed: 10 Feb 2026 at 20:55

Historical Analysis & Change Tracking