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

sanity.io

https://sanity.io· First analyzed 15 Feb 2026· Updated 15 Feb 2026

Export

sanity.io

Mobile

Sponsored

Hosting Provider

Google Cloud Platform

cloud.google.com

IP Address

35.186.225.23

Server Location

🇺🇸 Kansas City, United States

ASN

AS396982

Organization

Google Cloud

Server

Vercel

Nameservers

ns-cloud-b3.googledomains.com.ns-cloud-b2.googledomains.com.ns-cloud-b1.googledomains.com.ns-cloud-b4.googledomains.com.

Performance

Page Speed

1.6 MB

158 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

JAMstack

🔀 Hybrid

Decoupled

Frontend

Framework

Next.js

Styling

Tailwind CSS

API

Data Source

Headless CMS

Sanity

Infrastructure

Hosting

Google Cloud Platform

Detected API Sources

https://cdn.sanity.io/images/3...

Technology Stack

12 Technologies Detected

Meta Frameworks

Next.js Gatsby Remix Astro SvelteKit

Analytics

Frameworks

CSS Frameworks

Tag Managers

Platforms

CDN

SEO Analysis

B70/100

sanity.iosanity.io

The Content Operating System | Sanity

Sanity is a fully customizable all-code backend for AI, automations, and applications to author and render content.

Title Length37 chars

Recommended: 50-60 chars

Description Length115 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (142/163)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

6 URLs

robots.txt

11 rules

Sitemap reference found

Sponsored

Security Score

81%Very Good

Static / Informational

HTTPS

No WAF

83d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

08.02.2026

Valid Until

09.05.2026

Subject Alternative Names (1)

www.sanity.io

SHA-256 Fingerprint

14:AE:27:C9:0E:0F:BB:A2:21:4B:B6:9A:DF:F6:B8:83:C7:5D:40:97...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-origin

https://admin.sanity.io

age

20385

cache-control

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

content-disposition

inline

content-encoding

⚡ Brotli(br)

content-security-policy

frame-ancestors 'self' https://*.sanity.io https://*.sanity....

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (5)

aspmx2.googlemail.com

alt1.aspmx.l.google.com

aspmx3.googlemail.com

alt2.aspmx.l.google.com

+1 more

Domain Information

sanity.io

Domain Age

11y 1m

Created

07.01.2015

Expires

07.01.2027

Last Updated

12.11.2022

Registrar

NameCheap, 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

waldenburgNormal

46/100

Readability

/30

25/40

20px · LH 1.10

Hierarchy

/20

18/25

4.8x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

waldenburgNormal

Sans96px

Body Font

waldenburgNormal

Sans20px

Contrast Ratio

Reading Comfort

~34 CPL

Needs attention

96px

48px

13px

20px

✅ Excellent readability: 20px body text is ideal for all devices.

⚠️ Tight line spacing (1.10). Consider 1.4-1.6 for better readability.

✅ Strong hierarchy: Headlines are 4.8x larger than body text.

✅ Good performance: Using 2 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.

Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

OsanoMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

28 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(18)cmp.osano.com(1)googletagmanager.com(1)

Website Identity

X (Twitter)LinkedIn GitHub Bluesky

Sponsored

Last analyzed: 15 Feb 2026 at 00:08

Historical Analysis & Change Tracking