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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bartleby.com

https://bartleby.com· First analyzed 12 Feb 2026· Updated 12 Feb 2026

Export

bartleby.com

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

18.165.122.93

Server Location

🇮🇪 Dublin, Ireland

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

Nginx

CDN

CloudFront

Nameservers

ns-663.awsdns-18.net.ns-1443.awsdns-52.org.ns-1563.awsdns-03.co.uk.ns-44.awsdns-05.com.

Performance

Page Speed

1 MB

103 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Hybrid

🔀 Hybrid

Frontend

Framework

Next.js

Infrastructure

Hosting

Amazon Web Services (AWS)

CDN

CloudFront

Technology Stack

15 Technologies Detected

Meta Frameworks

Next.js Gatsby Astro

Icon Libraries

Font Awesome Material Icons Ionicons

Analytics

Frameworks

CSS Frameworks

Fonts

Tag Managers

Customer Support

Web Servers

Security

SEO Analysis

A+90/100

bartleby.combartleby.com

Homework Help and Textbook Solutions | bartleby

Reach your academic happy place with access to thousands of textbook solutions written by subject matter experts.

Title Length47 chars

Recommended: 50-60 chars

Description Length113 chars

Recommended: 120-160 chars

Issues (0)

1 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

53 URLs

robots.txt

29 rules

Sitemap reference found

Sponsored

Security Score

46%Poor

Interactive

HTTPS

No WAF

156d

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

20.06.2025

Valid Until

18.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.bartleby.combartleby.com

SHA-256 Fingerprint

B2:63:DC:A3:90:65:A2:F0:09:EA:E7:31:7C:9D:A0:ED:43:6D:16:01...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

age

58177

cache-control

🔵 Public(public)

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

date

Thu, 12 Feb 2026 04:02:32 GMT

link

<https://fonts.gstatic.com>; rel=preconnect; crossorigin, <h...

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (5)

alt4.aspmx.l.google.com

alt1.aspmx.l.google.com

alt3.aspmx.l.google.com

aspmx.l.google.com

+1 more

Domain Information

bartleby.com

Domain Age

28y 10m

Created

03.04.1997

Expires

26.09.2030

Last Updated

26.09.2020

Registrar

Name.com, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Data Protection Officer mentioned

Typography & Readability

Source Sans Pro + system-ui

86/100

Readability

/30

40/40

19px · LH 1.53

Hierarchy

/20

25/25

3.37x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Source Sans Pro

Sans64px

Body Font

system-ui

Sans19px

Contrast Ratio

Reading Comfort

Dual Sans-Serif

left aligned

64px

24px

18px

19px

✅ Excellent readability: 19px body text is ideal for all devices.

✅ Optimal line spacing: 1.53 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 3.4x larger than body text.

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

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

⚠️ Cramped layout: 28 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Reviews & Social Proof

BazaarvoiceEnterprise

Customer reviews and testimonials

Sponsored

Scripts & Styles

21 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(19)gstatic.com(1)

Website Identity

bartleby.com

28 years old

Name.com, Inc.📧 Google Workspace

Social Profiles

Facebook X (Twitter)Instagram YouTube

Sponsored

Last analyzed: 12 Feb 2026 at 20:12

Historical Analysis & Change Tracking