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

kartra.com

https://kartra.com· First analyzed 22 Apr 2026· Updated 22 Apr 2026

Export

kartra.com

Mobile

Sponsored

Hosting Provider

WP Engine

wpengine.com

IP Address

141.193.213.11

Site Location

🇺🇸 United Statesvia phone

Server Location

🇺🇸 Austin, United States

ASN

AS209242

Organization

WPEngine, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

fred.ns.cloudflare.com.emma.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

405 ms10%

Speed Index

526 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

304 KB

161 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

kartraCustom

Progressive Web App

PWA ReadyWeb ManifestService WorkerApple Touch IconTheme Color

Technology Stack

25 Technologies Detected

Plugins

Nelio Ab Testing Nelio Session Recordings Popup Maker Popup Maker Pro Google Site Kit Greenshift Animation And Page Builder Blocks

Analytics

Facebook Pixel Microsoft Clarity

Advertising

Google Ads LinkedIn Ads Microsoft Advertising

Libraries

Other

UI Components

Other

CSS Frameworks

Fonts

Tag Managers

Other

CDN

SEO Analysis

B74/100

Meta Tags14/15

Content3/12

Headings3/8

Technical24/25

E-E-A-T7/7

Images2/7

Links5/5

URL5/5

Social5/5

Freshness2/4

Mobile1/4

Indexability3/3

kartra.comkartra.com

Kartra - The All In One Marketing Platform

Streamline your marketing with an all-in-one marketing platform that includes automated email, sales funnels, landing pages, forms, and more!

Title Length42 chars

Recommended: 50-60 chars (~257px / 580px)

Description Length141 chars

Recommended: 120-160 chars

Issues (3)

• Very thin content (8 words). Search engines need substantial content for ranking.
• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (62/68) — critical for accessibility and SEO

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

5 URLs

5 sub-sitemaps

robots.txt

8 rules

Sitemap reference found

Local SEO

Local Search Readiness

33/100

Needs Work

9 8

Sponsored

AI & LLM Readiness

D49/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

12/25

Citation

10/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:2%

Words:2,679

Token eff.:Optimal

Structured Data

6 JSON-LD

FAQPage×1.5(min)microdataPerson×1.3Organization×1.1WebSiteBreadcrumbListSearchAction

sameAs entity links

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph3/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (10)

AI readiness recommendation preview...

Upgrade to view recommendations

Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

67/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

6/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

14/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

11/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

1/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

2 recommendations

•Accessibility recommendation preview...

Upgrade to view recommendations

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

76/100

A+

31 mg

CO₂e / view

304.3 KB

Page Weight

90%

Cleaner Than

New Visitor

35 mg

Returning (cached)

18 mg

Annual (10K/mo)

3.7 kg

Emission Segments

Data Center

2 mg

Network

9 mg

Device

20 mg

Resource Breakdown

JavaScript

7.1 KB

Images

13.2 KB

CSS

62.9 KB

HTML

97.9 KB

Other

123.2 KB

Green Hosting Verified

Google Cloud

GWF Verified

3 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

46%Poor

Interactive

HTTPS

WAF

61d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

25.03.2026

Valid Until

23.06.2026

Subject Alternative Names (1)

kartra.com

SHA-256 Fingerprint

CE:DA:78:DC:7E:D2:74:F7:36:B4:BC:62:B2:B0:A9:DB:49:F1:F6:0A...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ch

Sec-CH-UA-Mobile

alt-svc

h3=":443"; ma=86400

cache-control

🟡 600s(max-age=600, must-revalidate)

cf-cache-status

EXPIRED

cf-ray🇩🇪 Frankfurt

9f05b25a09b00394-FRA

content-encoding

⚡ Brotli(br)

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (5)

aspmx.l.google.com

alt3.aspmx.l.google.com

alt4.aspmx.l.google.com

alt1.aspmx.l.google.com

+1 more

Domain Information

kartra.com

Domain Age

11y 7m

Created

11.09.2014

Expires

11.09.2026

Last Updated

12.09.2025

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

CookieYes

Cookie Consent Banner

CookieYes

GDPR Indicators

Cookie consent banner detected

CMP: CookieYes

Data Protection Officer mentioned

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

81/100

Mobile Friendly923 breakpoints

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width, initial-scale=1.0, minimal-ui

2 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Outfit + Roboto

WCAG Partial

65/100

Readability

/30

24/30

16px · LH 1.50

Hierarchy

/20

8/20

WCAG

/25

17/25

1:1 min contrast

Performance

/25

16/25

2 fonts · 19 req

Heading Font

Outfit

Sans

Body Font

Roboto

Sans16px

Contrast Ratio

1:1

8 issues

Reading Comfort

~44 CPL

Narrow lines

60px

16px

30px

16px

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

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

⚠️ Partial contrast: 8 elements below WCAG AA threshold (min 1.0:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

✅ Modern fluid typography: clamp() with rem units ensures zoom accessibility (WCAG 1.4.4).

✅ Lean font stack: 2 font families keeps load times fast.

GGoogle Fonts Buy on MyFontsFluid Type (rem)Flesch 54

Color Palette

9 unique colors

Light

#ffffff

Background· 43%

#2a356d

Secondary· 14.5%

#0047fe

Primary· 0%

#e1e9f4

Primary· 11.7%

#bbdcef

Accent· 5.9%

#1b204a

Primary· 5.3%

#6f85a2

Secondary· 3.6%

#c5f4e9

Accent· 3.4%

Business & Marketing Stack

9 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

Microsoft ClarityFree

User behavior and product analytics

Advertising

Google AdsEnterprise

Facebook PixelMid-Market

LinkedIn AdsEnterprise

Microsoft AdsEnterprise

Ad platforms and retargeting pixels

Privacy & Cookies

CookieYesSMB

Cookie consent and privacy compliance tools

A/B Testing & Optimization

VWO (Visual Website Optimizer)Mid-Market

Experimentation and conversion optimization

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(4)bat.bing.com(3)googleads.g.doubleclick.net(3)clarity.ms(2)connect.facebook.net(2)

Website Identity

Kartra

Organization

Streamline your marketing with an all-in-one marketing platform that includes automated email, sales funnels, landing pages, forms, and more!

+1 (858) 869-9533

kartra.com/

11 years old

Location detected: 🇺🇸 United Statesvia phone

GoDaddy.com, LLC📧 Google Workspaceen-US

Social Profiles

Facebook X (Twitter)Instagram

Sponsored

Last analyzed: 22 Apr 2026 at 15:36

Historical Analysis & Change Tracking