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

sentry.io

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

Export

sentry.io

Mobile

Sponsored

Hosting Provider

Google Cloud Platform

cloud.google.com

IP Address

35.186.247.156

Server Location

🇺🇸 Kansas City, United States

ASN

AS396982

Organization

Google Cloud

Server

Nginx

Nameservers

ns-cloud-d1.googledomains.com.ns-cloud-d4.googledomains.com.ns-cloud-d2.googledomains.com.ns-cloud-d3.googledomains.com.

Performance

Page Speed

668 KB

64 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

JAMstack

⚙️ SSR

Decoupled

Frontend

Framework

Astro

Styling

Tailwind CSS

API

Data Source

Headless CMS

Contentful

Infrastructure

Hosting

Google Cloud Platform

Detected API Sources

//images.ctfassets.net/em6l9zw...

Technology Stack

10 Technologies Detected

Frameworks

React

Svelte SolidJS

Analytics

Plausible Analytics Sentry

Meta Frameworks

CSS Frameworks

Web Servers

Customer Support

Security

SEO Analysis

A82/100

sentry.iosentry.io

Application Performance Monitoring & Error Tracking Software

Application performance monitoring for developers & software teams to see errors clearer, solve issues faster & continue learning continuously. Get started a...

Description truncated.

Title Length60 chars

Recommended: 50-60 chars

Description Length169 chars

Recommended: 120-160 chars

Issues (0)

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

1 URLs

robots.txt

4 rules

Sitemap reference found

Sponsored

Security Score

56%Poor

Interactive

HTTPS

No WAF

190d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

24.07.2025

Valid Until

24.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

sentry.io*.sentry.io

SHA-256 Fingerprint

F3:73:7A:50:D7:AC:5C:4F:8E:94:6B:EC:E0:EA:D2:F8:6F:EE:EA:F8...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-origin

age

101829

alt-svc

h3=":443"; ma=2592000,h3-29=":443"; ma=2592000

cache-control

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

content-disposition

inline; filename="welcome"

content-encoding

📦 Gzip(gzip)

Good Warning Issue

Email Infrastructure

Google Workspace

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (5)

alt4.aspmx.l.google.com

aspmx.l.google.com

alt3.aspmx.l.google.com

alt1.aspmx.l.google.com

+1 more

Domain Information

sentry.io

Domain Age

13y 10m

Created

07.04.2012

Expires

07.04.2026

Last Updated

12.03.2025

Registrar

Gandi SAS

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

Typography & Readability

Dammit Sans + Rubik

80/100

Readability

/30

32/40

14px · LH 1.43

Hierarchy

/20

25/25

6.29x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Dammit Sans

Sans88px

Body Font

Rubik

Sans14px

Contrast Ratio

Reading Comfort

~35 CPL

Needs attention

88px

60px

16px

14px

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

✅ Optimal line spacing: 1.43 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 6.3x larger than body text.

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

✅ 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

2 Tools Detected

Growing

Behavior Analytics

PlausibleSMB

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

8 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(3)plausible.io(1)

Website Identity

X (Twitter)LinkedIn GitHub Discord

Sponsored

Last analyzed: 15 Feb 2026 at 01:12

Historical Analysis & Change Tracking