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

constantcontact.com

https://constantcontact.com· First analyzed 11 Feb 2026· Updated 11 Feb 2026

Export

constantcontact.com

Mobile

Sponsored

Hosting Provider

Constant Contact, Inc

IP Address

208.75.122.14

Server Location

🇺🇸 Waltham, United States

ASN

AS40444

Organization

Constant Contact, Inc

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

dns1.p01.nsone.net.dns2.p01.nsone.net.dns3.p01.nsone.net.dns4.p01.nsone.net.

Performance

Page Speed

2 MB

137 requests

0–49

50–89

90–100

Architecture Stack

JAMstack

🔀 Hybrid

Decoupled

Frontend

Framework

Next.js

API

Data Source

Headless CMS

Contentful

Infrastructure

Hosting

Constant Contact, Inc

CDN

Cloudflare

Detected API Sources

https://images.ctfassets.net/t...

Technology Stack

16 Technologies Detected

Analytics

Customer Support

Other

Meta Frameworks

Libraries

Other

CSS Frameworks

Email Marketing

Advertising

CDN

Marketing

SEO Analysis

A88/100

constantcontact.comconstantcontact.com

Digital and Email Marketing Platform | Constant Contact

With Constant Contact, you can create effective email marketing and online marketing campaigns to meet your business goals. Start your FREE trial today!

Title Length55 chars

Recommended: 50-60 chars

Description Length152 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (54/89)

1 issues found

Upgrade to view details

Sponsored

Security Score

26%Critical

Interactive

HTTPS

WAF

81d

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

date

Wed, 11 Feb 2026 00:26:47 GMT

content-type

text/html; charset=utf-8

server

cloudflare

server-timing

cfCacheStatus;desc="MISS", cfOrigin;dur=0, cfEdge;dur=1200

content-encoding

zstd

cf-ray🇩🇪 Frankfurt

9cbfb776aba165e1-FRA

Good Warning Issue

Typography & Readability

Arial + sans-serif

75/100

Readability

/30

32/40

15px · LH 1.60

Hierarchy

/20

15/25

0.93x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Arial

Sans14px

Body Font

sans-serif

Sans15px

Contrast Ratio

Reading Comfort

~64 CPL

Optimal (45–75)

14px

44px

36px

22px

15px

Perfect Fourth

Scale

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

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

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

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

✅ Optimal line length: ~64 characters per line is comfortable to read.

Buy on MyFontsVariable Fonts

Business & Marketing Stack

5 Tools Detected

Enterprise

Customer Support

DriftMid-Market

Live chat and helpdesk tools

Behavior Analytics

Google AnalyticsFree

Microsoft ClarityFree

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

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(13)clarity.ms(1)js.driftt.com(1)google-analytics.com(1)googletagmanager.com(1)

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Last analyzed: 11 Feb 2026 at 00:27

Historical Analysis & Change Tracking