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

startpage.com

https://startpage.com· First analyzed 15 Feb 2026· Updated 15 Feb 2026

Export

startpage.com

Mobile

Sponsored

Hosting Provider

Surfboard Holding BV

IP Address

67.63.60.231

Server Location

🇳🇱 The Hague, The Netherlands

ASN

AS16509

Organization

Surfboard Holding BV

Nameservers

dns1.p01.nsone.net.dns2.p01.nsone.net.dns3.p01.nsone.net.dns4.p01.nsone.net.

Performance

Page Speed

12 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Surfboard Holding BV

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

2 Technologies Detected

CSS Frameworks

Tailwind CSS

Fonts

Google Fonts

SEO Analysis

D56/100

startpage.comstartpage.com

Startpage - Private Search Engine. No Tracking. No Search History.

Search and browse the internet without being tracked or targeted. Startpage is the world's most private search engine. Use Startpage to protect your personal...

Description truncated.

Title Length66 chars

Recommended: 50-60 chars

Description Length163 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag - every page should have one H1
• Many images missing alt text (70/72)

5 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

11 rules

Sponsored

Security Score

81%Very Good

Interactive

HTTPS

No WAF

267d

Certificate Details

Type

Extended Validation (EV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

10.11.2025

Valid Until

09.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.startpage.comstartpage.com

SHA-256 Fingerprint

1C:FA:5F:60:61:85:5F:A6:36:03:AE:99:C3:B0:F6:D5:A3:54:14:66...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

content-encoding

📦 Gzip(gzip)

content-security-policy

default-src 'self' *.startpage.com; script-src 'self' *.star...

content-type

text/html; charset=utf-8

date

Sun, 15 Feb 2026 03:33:37 GMT

referrer-policy

origin

strict-transport-security

max-age=31536000; includeSubDomains

Good Warning Issue

Email Infrastructure

Google Workspace

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (5)

alt1.aspmx.l.google.com

aspmx.l.google.com

alt3.aspmx.l.google.com

alt4.aspmx.l.google.com

+1 more

Domain Information

startpage.com

Domain Age

28y 4m

Created

11.10.1997

Expires

10.10.2028

Last Updated

05.04.2023

Registrar

eNom, LLC

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Data Protection Officer mentioned

Typography & Readability

Helvetica Neue

58/100

Readability

/30

32/40

14px · LH 1.43

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Helvetica Neue

Sans

Body Font

Helvetica Neue

Sans14px

Contrast Ratio

Reading Comfort

~34 CPL

Needs attention

18px

19px

14px

Minor Second

Scale

⚠️ Small text: 14px may be hard to read on mobile. Consider 16px+.

✅ Optimal line spacing: 1.43 ratio ensures comfortable reading.

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

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

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

✅ Protected text on images: Using gradient for readability.

Buy on MyFonts

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

3 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cdn.startpage.com(3)

Website Identity

Facebook X (Twitter)Instagram Mastodon Reddit

Sponsored

Last analyzed: 15 Feb 2026 at 03:33

Historical Analysis & Change Tracking