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

plausible.io

https://plausible.io· First analyzed 18 Feb 2026· Updated 18 Feb 2026

Export

plausible.io

Sponsored

Hosting Provider

DataCamp Limited

IP Address

185.111.111.156

Server Location

🇩🇪 Frankfurt am Main, Germany

ASN

AS212238

Organization

DataCamp Limited

Server

BunnyCDN-DE1-1331

CDN

Nameservers

coco.bunny.net.kiki.bunny.net.

Performance

Page Speed

90 KB

15 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

Alpine.js

Styling

Tailwind CSS

Infrastructure

Hosting

DataCamp Limited

CDN

Technology Stack

6 Technologies Detected

Analytics

Plausible Analytics Matomo Plausible

Frameworks

Alpine.js

CSS Frameworks

Tailwind CSS

CDN

Bunny CDN

SEO Analysis

A84/100

plausible.ioplausible.io

Plausible Analytics | Simple, privacy-friendly Google Analytics alt...

Plausible is a lightweight and open-source Google Analytics alternative. Your website data is 100% yours and the privacy of your visitors is respected.

Title truncated.

Title Length75 chars

Recommended: 50-60 chars

Description Length151 chars

Recommended: 120-160 chars

Issues (0)

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

1 rules

Sitemap reference found

Allows all crawlers

Sponsored

Security Score

73%Good

Static / Informational

HTTPS

No WAF

73d

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

01.02.2026

Valid Until

02.05.2026

Subject Alternative Names (1)

plausible.io

SHA-256 Fingerprint

20:1A:42:10:AC:43:B1:3B:61:73:BF:90:65:1C:B7:F7:BA:EE:1E:AC...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ch

Sec-CH-UA-Platform, Sec-CH-UA

cache-control

🔵 1 Days(public, max-age=86400)

cdn-cache

HIT

cdn-cache-control

public, max-age=86400, must-revalidate

cdn-cachedat

02/17/2026 11:37:01

cdn-edgestorageid

1328

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

work-mx.app.hey.com

Domain Information

plausible.io

Domain Age

7y 1m

Created

30.12.2018

Expires

30.12.2026

Last Updated

30.11.2025

Registrar

Gandi SAS

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

system-ui

93/100

Readability

/30

40/40

16px · LH 1.50

Hierarchy

/20

25/25

3x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

system-ui

Sans48px

Body Font

system-ui

Sans16px

Contrast Ratio

Reading Comfort

~37 CPL

Needs attention

48px

30px

14px

16px

✅ 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.

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

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

⚠️ Cramped layout: 14 elements lack adequate spacing.

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

PlausibleSMB

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

5 Resources

Scripts

Styles

Async

Defer

Top Script Sources

plausible.io(1)local(1)

Website Identity

X (Twitter)LinkedIn GitHub

Sponsored

Last analyzed: 18 Feb 2026 at 09:37

Historical Analysis & Change Tracking