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

seattle.gov

https://seattle.gov· First analyzed 14 Feb 2026· Updated 14 Feb 2026

Export

seattle.gov

Mobile

Sponsored

Hosting Provider

City of Seattle

IP Address

156.74.251.21

Server Location

🇺🇸 Seattle, United States

ASN

AS3401

Organization

City of Seattle

Nameservers

pdns100.ultradns.biz.pdns100.ultradns.com.pdns100.ultradns.net.pdns100.ultradns.org.+2 more

Performance

Page Speed

997 KB

33 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

City of Seattle

Technology Stack

6 Technologies Detected

Analytics

CSS Frameworks

Icon Libraries

Fonts

Tag Managers

SEO Analysis

C62/100

seattle.govseattle.gov

Seattle.gov Home

Official city government site. Citizen, business, and visitor information sections, plus city government information.

Title Length16 chars

Recommended: 50-60 chars

Description Length117 chars

Recommended: 120-160 chars

Issues (0)

6 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

4 rules

Allows all crawlers

Sponsored

Security Score

36%Critical

Interactive

HTTPS

No WAF

11d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

SSL Corporation

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

21.02.2025

Valid Until

25.02.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.seattle.govseattle.gov

SHA-256 Fingerprint

0B:D5:E0:1E:56:B3:0F:79:22:5C:EA:8D:CA:9F:CD:80:D6:2B:A6:5B...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 300s(public, max-age=300)

content-length

38827

content-type

text/html; charset=utf-8

date

Sat, 14 Feb 2026 04:11:12 GMT

strict-transport-security

max-age=16070400; includeSubDomains; preload

set-cookie

TS0166db00

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

mx.us.etp.fireeyegov.com

Domain Information

seattle.gov

Domain Age

25y 2m

Created

07.12.2000

Expires

02.09.2026

Last Updated

07.09.2025

Registrar

get.gov

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data subject rights referenced

Typography & Readability

Seattle Text + sans-serif

76/100

Readability

/30

40/40

16px · LH 1.43

Hierarchy

/20

18/25

2x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Seattle Text

Sans32px

Body Font

sans-serif

Sans16px

Contrast Ratio

Reading Comfort

~36 CPL

Needs attention

32px

30px

16px

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.43 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

✅ Good performance: Using 2 font families keeps load times fast.

⚠️ Cramped layout: 20 elements lack adequate spacing.

⚠️ Inconsistent alignment: Mix of left/center/right creates visual noise.

GGoogle Fonts 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

18 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cms_resources(7)googletagmanager.com(2)siteimproveanalytics.com(1)trumba.com(1)cdn.jwplayer.com(1)

Website Identity

Facebook X (Twitter)Instagram

Sponsored

Last analyzed: 14 Feb 2026 at 04:11

Historical Analysis & Change Tracking