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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404media.co

https://404media.co· First analyzed 15 Feb 2026· Updated 15 Feb 2026

Export

404media.co

Mobile

Sponsored

Hosting Provider

DigitalOcean

digitalocean.com

IP Address

178.128.137.126

Server Location

🇳🇱 Amsterdam, The Netherlands

ASN

AS14061

Organization

Digitalocean

Server

OpenResty

CDN

Fastly

Nameservers

ns66.domaincontrol.com.ns65.domaincontrol.com.

Performance

Page Speed

1.1 MB

70 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Ghostv6.18

Progressive Web App

PWA ReadyWeb ManifestService WorkerTheme Color

Technology Stack

12 Technologies Detected

Advertising

Google Ads Criteo Taboola Outbrain

Meta Frameworks

CSS Frameworks

Icon Libraries

Fonts

Analytics

Payments

Social

Web Servers

SEO Analysis

A88/100

404media.co404media.co

404 Media

404 Media is an independent media company founded by technology journalists Jason Koebler, Emanuel Maiberg, Samantha Cole, and Joseph Cox.

Title Length9 chars

Recommended: 50-60 chars

Description Length138 chars

Recommended: 120-160 chars

Issues (0)

2 issues found

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Crawlability

Sitemap

Type: index

4 URLs

robots.txt

9 rules

Sitemap reference found

Sponsored

Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

64d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

ZeroSSL

Key Algorithm

RSA (2048 bit)

Signature

SHA-384 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

20.01.2026

Valid Until

20.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.404media.co

SHA-256 Fingerprint

1F:A3:F4:43:5E:6C:0E:0E:09:3B:3B:7C:E5:D9:41:33:B8:E6:B1:2E...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

age

57447

alt-svc

clear

cache-control

🟡 0s(public, max-age=0)

content-encoding

📦 Gzip(gzip)

content-length

11957

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

MX Records (5)

aspmx.l.google.com

alt3.aspmx.l.google.com

alt4.aspmx.l.google.com

alt1.aspmx.l.google.com

+1 more

Domain Information

404media.co

DNSSEC

Not Enabled

Privacy & Compliance

Quantcast Choice

Cookie Consent Banner

Quantcast Choice

GDPR Indicators

Cookie consent banner detected

CMP: Quantcast Choice

Legitimate interest basis mentioned

Typography & Readability

Open Sans + Inter

71/100

Readability

/30

40/40

18px · LH 1.70

Hierarchy

/20

15/25

1.02x ratio

WCAG

/25

11/15

Contrast: undefined

Performance

/25

10/20

4 fonts

Heading Font

Open Sans

Sans18px

Body Font

Inter

Sans18px

Contrast Ratio

Reading Comfort

~39 CPL

Needs attention

18px

14px

35px

44px

18px

Minor Third

Scale

✅ Excellent readability: 18px body text is ideal for all devices.

✅ Optimal line spacing: 1.70 ratio ensures comfortable reading.

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

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

⚠️ Cramped layout: 19 elements lack adequate spacing.

✅ Clean layout: Consistent left alignment throughout.

GGoogle Fonts

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

PlausibleSMB

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

29 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(4)cdn.jsdelivr.net(3)404media.co(2)securepubads.g.doubleclick.net(2)fundingchoicesmessages.google.com(2)

Website Identity

404media.co

📧 Google Workspace

Social Profiles

Facebook X (Twitter)Instagram TikTok Mastodon Bluesky

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Last analyzed: 15 Feb 2026 at 05:59

Historical Analysis & Change Tracking