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.

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reviews.io

https://reviews.io· First analyzed 20 Feb 2026· Updated 20 Feb 2026

Export

reviews.io

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.18.33.62

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

jeremy.ns.cloudflare.com.adrian.ns.cloudflare.com.

Performance

Page Speed

225 KB

127 requests

Image Optimization

Lazy LoadWebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Webflow

Technology Stack

10 Technologies Detected

Reviews

Customer Support

Libraries

CSS Frameworks

Fonts

Analytics

Tag Managers

CDN

SEO Analysis

B76/100

reviews.ioreviews.io

REVIEWS.io - Company & Product Review Collection

Review collection made simple. Our friendly review platform helps you build trust quickly with our monthly subscription & flexible plans.

Title Length48 chars

Recommended: 50-60 chars

Description Length137 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (266/312)

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

32 rules

Sitemap reference found

Sponsored

Security Score

56%Poor

Interactive

HTTPS

WAF

45d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

06.01.2026

Valid Until

06.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

reviews.io*.reviews.io

SHA-256 Fingerprint

4F:FD:4B:61:79:12:F1:40:48:32:9D:28:67:6C:96:82:C2:C5:22:56...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-origin

age

4997

cache-control

🟡 4 Hours(public, max-age=14400)

cf-cache-status

HIT

cf-ray🇩🇪 Frankfurt

9d0dc12dce339bf7-FRA

content-encoding

⚡ Brotli(br)

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (4)

alt1.aspmx.l.google.com

alt3.aspmx.l.google.com

alt2.aspmx.l.google.com

aspmx.l.google.com

Domain Information

reviews.io

Domain Age

15y 8m

Created

16.06.2010

Expires

16.06.2026

Last Updated

19.04.2025

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Termly

Cookie Consent Banner

Termly

GDPR Indicators

Cookie consent banner detected

CMP: Termly

Data Protection Officer mentioned

Typography & Readability

system-ui

81/100

Readability

/30

32/40

16px · LH 1.25

Hierarchy

/20

21/25

3.5x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

system-ui

Sans56px

Body Font

system-ui

Sans16px

Contrast Ratio

Reading Comfort

Single Font Family

left aligned

56px

40px

24px

14px

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

✅ Strong hierarchy: Headlines are 3.5x larger than body text.

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

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

⚠️ Cramped layout: 12 elements lack adequate spacing.

GGoogle Fonts

Business & Marketing Stack

6 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

TermlySMB

Cookie consent and privacy compliance tools

Reviews & Social Proof

Reviews.ioSMB

Stamped.ioSMB

LooxSMB

Customer reviews and testimonials

Sponsored

Scripts & Styles

22 Resources

Scripts

Styles

Async

Defer

Top Script Sources

assets.reviews.io(4)cdn.prod.website-files.com(2)cdnjs.cloudflare.com(2)ajax.googleapis.com(1)app.termly.io(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn

Sponsored

Last analyzed: 20 Feb 2026 at 11:45

Historical Analysis & Change Tracking