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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espressif.com

https://espressif.com· First analyzed 18 Feb 2026· Updated 18 Feb 2026

Export

espressif.com

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

13.33.235.84

Server Location

🇺🇸 New York, United States

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

Apache

CDN

CloudFront

Nameservers

ns-1503.awsdns-59.org.ns-2007.awsdns-58.co.uk.ns-363.awsdns-45.com.ns-694.awsdns-22.net.

Performance

Page Speed

9 MB

204 requests

Image Optimization

Responsive

0–49

50–89

90–100

Architecture Stack

Headless

⚙️ SSR

Decoupled

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

Amazon Web Services (AWS)

CDN

CloudFront

Detected API Sources

https://maps.google.cn/maps/ap...

Technology Stack

13 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Microsoft Clarity Segment

Libraries

UI Components

CSS Frameworks

Marketing

Advertising

Web Servers

Languages

SEO Analysis

D58/100

espressif.comespressif.com

Wireless SoCs, Software, Cloud and AIoT Solutions | Espressif Systems

Espressif is a global high-tech leader in wireless communication, IoT, AI SoCs, software, and solutions, for a smarter and greener future.

Title Length69 chars

Recommended: 50-60 chars

Description Length138 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (88/89)

5 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

43 rules

Sponsored

Security Score

25%Critical

Critical / Transactional

HTTPS

No WAF

142d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

09.06.2025

Valid Until

10.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.espressif.comespressif.com

SHA-256 Fingerprint

82:53:AE:48:B3:2A:82:FF:F4:CD:93:2A:84:8F:50:1B:07:00:84:A8...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

age

24948

cache-control

🔵 1 Days(public, max-age=86400)

content-encoding

📦 Gzip(gzip)

content-language

content-type

text/html; charset=utf-8

date

Tue, 17 Feb 2026 19:28:43 GMT

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

espressif-com.mail.protection.outlook.com

Domain Information

espressif.com

Domain Age

18y 6m

Created

10.08.2007

Expires

10.08.2026

Last Updated

11.08.2025

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Typography & Readability

Trueno-Bold + SourceHanSansCN-Light

8/100

Readability

/30

5/40

12px · LH 1.00

Hierarchy

/20

18/25

4x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

10/20

4 fonts

Heading Font

Trueno-Bold

Sans48px

Body Font

SourceHanSansCN-Light

Sans12px

Contrast Ratio

Reading Comfort

~207 CPL

Needs attention

48px

24px

22px

12px

❌ Critical: 12px body text is too small. Increase to at least 14px.

⚠️ Tight line spacing (1.00). Consider 1.4-1.6 for better readability.

✅ Strong hierarchy: Headlines are 4.0x larger than body text.

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

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

❌ Very long lines: ~207 chars/line causes eye strain. Use max-width: 65ch.

Buy on MyFonts

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

LinkedIn AdsEnterprise

Ad platforms and retargeting pixels

Privacy & Cookies

CookiebotMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

27 Resources

Scripts

Styles

Async

Defer

Top Script Sources

espressif.com(13)js-na2.hs-banner.com(1)js-na2.hs-analytics.net(1)maps.google.cn(1)scripts.clarity.ms(1)

Website Identity

espressif.com

18 years old

GoDaddy.com, LLC📧 Microsoft 365

Social Profiles

Facebook X (Twitter)Instagram LinkedIn YouTube GitHub Medium

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Last analyzed: 18 Feb 2026 at 02:24

Historical Analysis & Change Tracking