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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deeplearning.ai

https://deeplearning.ai· First analyzed 20 Feb 2026· Updated 20 Feb 2026

Export

deeplearning.ai

Sponsored

Hosting Provider

Vercel

vercel.com

IP Address

216.150.1.1

Server Location

🇺🇸 Walnut, United States

ASN

AS16509

Organization

Vercel, Inc

Server

Vercel

CDN

Cloudflare

WAF

Cloudflare

Nameservers

nia.ns.cloudflare.com.dave.ns.cloudflare.com.

Performance

Page Speed

2.2 MB

138 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Hybrid

⚡ SSG

Frontend

Framework

Next.js

Styling

Tailwind CSS

CMS

WordPress

Infrastructure

Hosting

Vercel

CDN

Cloudflare

Technology Stack

11 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel Microsoft Clarity PostHog

Meta Frameworks

CSS Frameworks

Fonts

Tag Managers

Marketing

Platforms

SEO Analysis

B78/100

deeplearning.aideeplearning.ai

DeepLearning.AI: Start or Advance Your Career in AI

DeepLearning.AI | Andrew Ng | Join over 7 million people learning how to use and build AI through our online courses. Earn certifications, level up your skil...

Description truncated.

Title Length51 chars

Recommended: 50-60 chars

Description Length192 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (31/50)

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

2 URLs

robots.txt

4 rules

Sitemap reference found

Allows all crawlers

Sponsored

Security Score

36%Critical

Interactive

HTTPS

No WAF

66d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

27.01.2026

Valid Until

27.04.2026

Subject Alternative Names (1)

www.deeplearning.ai

SHA-256 Fingerprint

2F:8E:59:3F:FD:88:B8:4D:D8:0F:D5:17:B1:32:8E:5E:51:69:82:85...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

age

332

cache-control

🟡 0s(public, max-age=0, must-revalidate)

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=utf-8

date

Fri, 20 Feb 2026 01:28:17 GMT

etag

W/"16ln8wpmdcd2uiu"

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (5)

aspmx.l.google.com

alt3.aspmx.l.google.com

alt2.aspmx.l.google.com

alt1.aspmx.l.google.com

+1 more

Domain Information

deeplearning.ai

Domain Age

8y 2m

Created

16.12.2017

Expires

30.11.2026

Last Updated

02.04.2025

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

Typography & Readability

ui-sans-serif

81/100

Readability

/30

40/40

16px · LH 1.50

Hierarchy

/20

25/25

3x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

ui-sans-serif

Sans48px

Body Font

ui-sans-serif

Sans16px

Contrast Ratio

Reading Comfort

~96 CPL

Needs attention

48px

96px

16px

Octave

Scale

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 3.0x larger than body text.

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

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

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

GGoogle Fonts

Business & Marketing Stack

6 Tools Detected

Enterprise

CRM Systems

HubSpotMid-Market

Customer Relationship Management platforms

Behavior Analytics

Microsoft ClarityFree

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

LinkedIn AdsEnterprise

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

24 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(19)scripts.clarity.ms(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn YouTube

Sponsored

Last analyzed: 20 Feb 2026 at 01:34

Historical Analysis & Change Tracking