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

omnisend.com

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

Export

omnisend.com

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.18.34.113

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

sara.ns.cloudflare.com.rob.ns.cloudflare.com.

Performance

Page Speed

3.6 MB

132 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

Omnisendv2.0.0

by Omnisend Team

View Theme

Technology Stack

15 Technologies Detected

Analytics

Plugins

Duracelltomi Google Tag Manager

UI Components

CSS Frameworks

Fonts

Tag Managers

Customer Support

Marketing

Email Marketing

Other

CDN

SEO Analysis

A88/100

omnisend.comomnisend.com

Email Marketing Software for Ecommerce | Omnisend

Smart email marketing software for ecommerce brands. Drive more revenue with less effort using automation, SMS, and seamless integrations.

Title Length49 chars

Recommended: 50-60 chars

Description Length138 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (209/284)

1 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

12 URLs

robots.txt

3 rules

Sitemap reference found

Allows all crawlers

Sponsored

Security Score

81%Very Good

Interactive

HTTPS

WAF

43d

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

04.01.2026

Valid Until

04.04.2026

Subject Alternative Names (2)

*.www.omnisend.comwww.omnisend.com

SHA-256 Fingerprint

41:40:84:EE:EC:5B:28:DC:95:73:FB:22:20:21:05:DE:D6:3B:33:E8...

Upgrade to view header details

HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cache-control

🟡 600s(max-age=600,public)

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9d08880f1b0fd366-FRA

content-encoding

⚡ Brotli(br)

content-security-policy

frame-ancestors 'none'; base-uri 'self';

Good Warning Issue

Email Infrastructure

Google Workspace

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (5)

alt2.aspmx.l.google.com

aspmx.l.google.com

alt3.aspmx.l.google.com

alt4.aspmx.l.google.com

+1 more

Domain Information

omnisend.com

Domain Age

12y 4m

Created

14.10.2013

Expires

14.10.2026

Last Updated

14.09.2025

Registrar

Cloudflare, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Data Protection Officer mentioned

Legitimate interest basis mentioned

Typography & Readability

Faktum-Bold + sans-serif

75/100

Readability

/30

32/40

15px · LH 1.60

Hierarchy

/20

21/25

5.33x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

17/20

System fonts

Heading Font

Faktum-Bold

Sans80px

Body Font

sans-serif

Sans15px

Contrast Ratio

Reading Comfort

~38 CPL

Needs attention

80px

48px

15px

⚠️ Small text: 15px may be hard to read on mobile. Consider 16px+.

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 5.3x larger than body text.

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

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

⚠️ Cramped layout: 41 elements lack adequate spacing.

GGoogle Fonts Buy on MyFonts

Business & Marketing Stack

6 Tools Detected

Enterprise

CRM Systems

HubSpotMid-Market

Customer Relationship Management platforms

Behavior Analytics

MixpanelMid-Market

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

CookiebotMid-Market

Cookie consent and privacy compliance tools

A/B Testing & Optimization

VWO (Visual Website Optimizer)Mid-Market

Experimentation and conversion optimization

Sponsored

Scripts & Styles

26 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(4)fast.wistia.com(4)omnisend.com(3)dev.visualwebsiteoptimizer.com(3)consent.cookiebot.com(2)

Website Identity

Facebook X (Twitter)Instagram LinkedIn YouTube Reddit

Sponsored

Last analyzed: 19 Feb 2026 at 20:32

Historical Analysis & Change Tracking