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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alipay.com

https://alipay.com· First analyzed 11 Feb 2026· Updated 11 Feb 2026

Export

alipay.com

Mobile

Sponsored

Hosting Provider

Zhejiang Ant Small And Micro Financial Services, Group

IP Address

110.75.130.45

Server Location

🇨🇳 Hangzhou, China

ASN

AS37963

Organization

Zhejiang Ant Small And Micro Financial Services, Group

Server

Tengine

CDN

Nameservers

ns3.alipay.com.ns1.alipay.com.ns4.alipay.com.ns2.alipay.com.

Performance

Page Speed

426 KB

11 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

🖥️ CSR

Infrastructure

Hosting

Zhejiang Ant Small And Micro Financial Services, Group

CDN

Technology Stack

6 Technologies Detected

Libraries

jQuery

Lodash Moment.js Day.js

CSS Frameworks

Ant Design

Web Servers

Tengine

SEO Analysis

F23/100

alipay.comalipay.com

支付宝

支付宝，全球领先的独立第三方支付平台，致力于为广大用户提供安全快速的电子支付/网上支付/安全支付/手机支付体验，及转账收款/水电煤缴费/信用卡还款/AA收款等生活服务应用。

Title Length3 chars

Recommended: 50-60 chars

Description Length86 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag - every page should have one H1

7 issues found

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Security Score

76%Good

Static / Informational

HTTPS

No WAF

258d

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

connection

keep-alive

content-type

text/html; charset=utf-8

server

Tengine

transfer-encoding

chunked

age

ali-swift-global-savetime

1770790706

Good Warning Issue

Typography & Readability

sans-serif

63/100

Readability

/30

25/40

16px · LH 1.15

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

sans-serif

Body Font

sans-serif

Sans16px

Contrast Ratio

Reading Comfort

Single Family

left aligned

✅ Excellent readability: 16px body text is ideal for all devices.

⚠️ Tight line spacing (1.15). Consider 1.4-1.6 for better readability.

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

⚠️ Inconsistent alignment: Mix of left/center/right creates visual noise.

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Scripts & Styles

9 Resources

Scripts

Styles

Async

Defer

Top Script Sources

gw.alipayobjects.com(7)render-intl.alipayobjects.com(1)

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Last analyzed: 11 Feb 2026 at 06:20

Historical Analysis & Change Tracking