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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postgresql.org

https://postgresql.org· First analyzed 10 Feb 2026· Updated 10 Feb 2026

Export

postgresql.org

Mobile

Sponsored

Hosting Provider

Conova Communications GmbH

IP Address

217.196.149.50

Server Location

🇦🇹 Salzburg, Austria

ASN

AS5404

Organization

Conova Communications GmbH

Server

Nginx

CDN

Varnish

Nameservers

ns3.postgresql.org.ns2.postgresql.org.ns4.postgresql.org.ns1.postgresql.org.

Performance

Page Speed

432 KB

18 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Conova Communications GmbH

CDN

Varnish

Technology Stack

6 Technologies Detected

CSS Frameworks

Icon Libraries

Analytics

Tag Managers

Web Servers

SEO Analysis

B70/100

postgresql.orgpostgresql.org

PostgreSQL: The world's most advanced open source database

The official site for PostgreSQL, the world's most advanced open source database

Title Length58 chars

Recommended: 50-60 chars

Description Length80 chars

Recommended: 120-160 chars

Issues (0)

4 issues found

Upgrade to view details

Sponsored

Security Score

69%Fair

Interactive

HTTPS

No WAF

82d

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

age

590

content-encoding

📦 Gzip(gzip)

content-security-policy

default-src 'self' ; img-src * data: ; script-src 'unsafe-ev...

content-type

text/html; charset=utf-8

cross-origin-opener-policy

same-origin

Good Warning Issue

Typography & Readability

Open Sans + sans-serif

75/100

Readability

/30

32/40

15px · LH 1.50

Hierarchy

/20

25/25

2.61x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Open Sans

Sans40px

Body Font

sans-serif

Sans15px

Contrast Ratio

Reading Comfort

~38 CPL

Needs attention

40px

25px

21px

15px

⚠️ Small text: 15px may be hard to read on mobile. Consider 16px+.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.6x larger than body text.

✅ Good performance: Using 1 font families keeps load times fast.

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

✅ Protected text on images: Using gradient for readability.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

7 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(2)google-analytics.com(1)googletagmanager.com(1)

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Last analyzed: 10 Feb 2026 at 22:37

Historical Analysis & Change Tracking