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

sonesta.com

https://sonesta.com· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

sonesta.com

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

75.2.60.5

Server Location

🇺🇸 Seattle, United States

ASN

AS16509

Organization

AWS Global Accelerator (GLOBAL)

Server

Netlify

CDN

Cloudflare

WAF

Cloudflare

Nameservers

fattouche.ns.cloudflare.com.gina.ns.cloudflare.com.

Performance

Page Speed

3.9 MB

130 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Hybrid

⚡ SSG

Frontend

Framework

Gatsby

Styling

Bootstrap

Infrastructure

Hosting

Amazon Web Services (AWS)

CDN

Cloudflare

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

12 Technologies Detected

Analytics

CSS Frameworks

Meta Frameworks

Icon Libraries

Fonts

Tag Managers

Advertising

Other

Platforms

SEO Analysis

C64/100

sonesta.comsonesta.com

Sonesta - Hotels, Resorts and Cruises

Book a hotel room among our global properties in the United States, Canada, Egypt, Peru, Columbia, Chile, Ecuador, and the Caribbean for your next adventure.

Title Length37 chars

Recommended: 50-60 chars

Description Length157 chars

Recommended: 120-160 chars

Issues (0)

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

1 URLs

robots.txt

10 rules

Sitemap reference found

Allows all crawlers

Sponsored

Security Score

81%Very Good

Interactive

HTTPS

No WAF

80d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

08.02.2026

Valid Until

09.05.2026

Subject Alternative Names (2)

sonesta.comwww.sonesta.com

SHA-256 Fingerprint

41:FD:C4:8A:C6:75:EC:29:D0:A1:AB:D3:D1:0F:80:76:CE:52:36:C0...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

access-control-allow-origin

age

15866

cache-control

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

cache-status

"Netlify Edge"; hit

content-encoding

⚡ Brotli(br)

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

mxb-00226201.gslb.pphosted.com

mxa-00226201.gslb.pphosted.com

Domain Information

sonesta.com

Domain Age

31y 7m

Created

08.07.1994

Expires

07.07.2026

Last Updated

03.07.2025

Registrar

CSC Corporate Domains, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Osano

Cookie Consent Banner

Osano

GDPR Indicators

Cookie consent banner detected

CMP: Osano

Data Protection Officer mentioned

Typography & Readability

Roboto + Helvetica

79/100

Readability

/30

32/40

16px · LH 1.25

Hierarchy

/20

20/25

1.75x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Roboto

Sans28px

Body Font

Helvetica

Sans16px

Contrast Ratio

Reading Comfort

~41 CPL

Needs attention

28px

20px

16px

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

✅ Good hierarchy: Clear distinction between headlines and body text.

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

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

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

Business & Marketing Stack

5 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

Quantum MetricEnterprise

User behavior and product analytics

Privacy & Cookies

OsanoMid-Market

Cookie consent and privacy compliance tools

A/B Testing & Optimization

AB TastyMid-Market

Experimentation and conversion optimization

Sponsored

Scripts & Styles

14 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(6)googletagmanager.com(2)google-analytics.com(1)cdn.quantummetric.com(1)cmp.osano.com(1)

Website Identity

Facebook Instagram YouTube

Sponsored

Last analyzed: 17 Feb 2026 at 14:29

Historical Analysis & Change Tracking