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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pik-potsdam.de

https://pik-potsdam.de· First analyzed 20 Feb 2026· Updated 20 Feb 2026

Export

pik-potsdam.de

Sponsored

Hosting Provider

Institut fuer Klimafolgenforschung e.V., Potsdam

IP Address

193.174.19.232

Server Location

🇩🇪 Berlin, Germany

ASN

AS680

Organization

Institut fuer Klimafolgenforschung e.V., Potsdam

Server

waitress

CDN

Varnish

Nameservers

deneb.dfn.de.dns-3.dfn.de.ns.pik-potsdam.de.

Performance

Page Speed

14.6 MB

127 requests

Image Optimization

Responsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

jQuery

Styling

Bootstrap

Infrastructure

Hosting

Institut fuer Klimafolgenforschung e.V., Potsdam

CDN

Varnish

Technology Stack

5 Technologies Detected

CSS Frameworks

Libraries

UI Components

Languages

SEO Analysis

B70/100

pik-potsdam.depik-potsdam.de

Potsdam Institute for Climate Impact Research

No description available for this page.

Title Length45 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description - important for click-through rates

3 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

16 rules

Sitemap reference found

Allows all crawlers

Sponsored

Security Score

31%Critical

Interactive

HTTPS

No WAF

204d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

12.09.2025

Valid Until

12.09.2026

OCSP Stapling

Enabled

Subject Alternative Names (3)

pik-potsdam.dewebmail.pik-potsdam.dewww.pik-potsdam.de

SHA-256 Fingerprint

65:B1:9B:04:7B:88:3E:6D:9C:03:D7:C3:EF:91:37:60:09:12:FB:4B...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

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HTTP Headers

Developer Console

accept-ranges

bytes

age

2235

cache-control

🟡 0s(max-age=0, s-maxage=3600, must-revalidate)

content-language

content-length

285541

content-type

text/html;charset=utf-8

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (3)

c2171.mx.srv.dfn.de

b2171.mx.srv.dfn.de

a2171.mx.srv.dfn.de

Domain Information

pik-potsdam.de

Last Updated

23.05.2019

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

IBM Plex Sans + serif

68/100

Readability

/30

40/40

17px · LH 1.77

Hierarchy

/20

8/25

1.47x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

10/20

3 fonts

Heading Font

IBM Plex Sans

Sans25px

Body Font

serif

Serif17px

Contrast Ratio

Reading Comfort

~36 CPL

Needs attention

25px

20px

50px

17px

Major Sixth

Scale

✅ Excellent readability: 17px body text is ideal for all devices.

✅ Optimal line spacing: 1.77 ratio ensures comfortable reading.

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

⚠️ Cramped layout: 17 elements lack adequate spacing.

✅ Clean layout: Consistent left alignment throughout.

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Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

27 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(10)pik-potsdam.de(10)

Website Identity

Facebook X (Twitter)Instagram LinkedIn YouTube Bluesky

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Last analyzed: 20 Feb 2026 at 02:22

Historical Analysis & Change Tracking