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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energysage.com

https://energysage.com· First analyzed 19 Feb 2026· Updated 19 Feb 2026

Export

energysage.com

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

18.165.122.11

Server Location

🇮🇪 Dublin, Ireland

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

CDN

CloudFront

Nameservers

ns-1911.awsdns-46.co.uk.ns-504.awsdns-63.com.ns-829.awsdns-39.net.ns-1131.awsdns-13.org.

Performance

Page Speed

11 KB

121 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

JAMstack

⚙️ SSR

Decoupled

Frontend

Framework

Nuxt.js

Styling

Tailwind CSS

API

Data Source

Headless CMS

Storyblok

Infrastructure

Hosting

Amazon Web Services (AWS)

CDN

CloudFront

Progressive Web App

Web ManifestApple Touch IconTheme Color

Detected API Sources

https://a-us.storyblok.com/f/1...

Technology Stack

5 Technologies Detected

Meta Frameworks

CSS Frameworks

Tag Managers

Marketing

Other

SEO Analysis

A84/100

energysage.comenergysage.com

Compare and save on clean home energy solutions | EnergySage

EnergySage is the simplest way to shop for clean home energy solutions. Join over 50,000 homeowners who have electrified their homes with EnergySage.

Title Length60 chars

Recommended: 50-60 chars

Description Length149 chars

Recommended: 120-160 chars

Issues (0)

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

35 URLs

robots.txt

18 rules

Sitemap reference found

Sponsored

Security Score

71%Good

Interactive

HTTPS

No WAF

139d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

09.06.2025

Valid Until

08.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.energysage.com*.www.energysage.com

SHA-256 Fingerprint

B5:22:9A:90:24:A3:46:06:F2:82:4D:8D:20:18:5B:85:7C:55:73:AD...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 60s(public, max-age=60, s-maxage=60)

content-encoding

⚡ Brotli(br)

content-security-policy

default-src blob:; script-src 'report-sample' 'unsafe-eval' ...

content-type

text/html; charset=UTF-8

date

Thu, 19 Feb 2026 16:40:30 GMT

etag

W/"dd89bc0e951c73bef08e891e09345c0a"

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (7)

aspmx5.googlemail.com

aspmx3.googlemail.com

alt1.aspmx.l.google.com

aspmx4.googlemail.com

+3 more

Domain Information

energysage.com

Domain Age

20y 8m

Created

07.06.2005

Expires

07.06.2030

Last Updated

15.10.2022

Registrar

Nameshield SAS

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Times New Roman

78/100

Readability

/30

30/40

16px · LH --

Hierarchy

/20

25/25

2x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Times New Roman

Serif32px

Body Font

Times New Roman

Serif16px

Contrast Ratio

Reading Comfort

~41 CPL

Needs attention

32px

24px

19px

16px

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

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

✅ Good performance: Using 1 font families keeps load times fast.

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

✅ Protected text on images: Using gradient for readability.

⚠️ Cramped layout: 12 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

A/B Testing & Optimization

VWO (Visual Website Optimizer)Mid-Market

Experimentation and conversion optimization

Reviews & Social Proof

Reviews.ioSMB

Customer reviews and testimonials

Sponsored

Scripts & Styles

12 Resources

Scripts

Styles

Async

Defer

Top Script Sources

widget.reviews.io(1)pages.energysage.com(1)

Website Identity

Facebook Instagram LinkedIn YouTube Threads Bluesky

Sponsored

Last analyzed: 19 Feb 2026 at 16:40

Historical Analysis & Change Tracking