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

envoyer.io

https://envoyer.io· First analyzed 12 Feb 2026· Updated 12 Feb 2026

Export

envoyer.io

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.18.22.192

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

jay.ns.cloudflare.com.carol.ns.cloudflare.com.

Performance

Page Speed

464 KB

20 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Tailwind CSS

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

3 Technologies Detected

CSS Frameworks

Tailwind CSS

Analytics

Fathom Analytics

CDN

Cloudflare

SEO Analysis

C64/100

envoyer.ioenvoyer.io

Envoyer - Zero Downtime PHP Deployment

One-click deployments built for teams, tuned for Laravel, loaded with tools and goodies you're going to love.

Title Length38 chars

Recommended: 50-60 chars

Description Length109 chars

Recommended: 120-160 chars

Issues (0)

5 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

2 rules

Allows all crawlers

Sponsored

Security Score

46%Poor

Interactive

HTTPS

WAF

88d

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

Valid From

10.02.2026

Valid Until

11.05.2026

Subject Alternative Names (2)

*.envoyer.ioenvoyer.io

SHA-256 Fingerprint

7E:15:44:18:BF:F9:41:3E:FD:D5:86:E7:94:9F:3C:49:B2:89:1D:09...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-cache, private)

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9cccf582cc6437bd-FRA

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Thu, 12 Feb 2026 15:01:02 GMT

Good Warning Issue

Email Infrastructure

Fastmail

Score

SPF

DKIM

DMARC

MX Records (2)

in2-smtp.messagingengine.com

in1-smtp.messagingengine.com

Domain Information

envoyer.io

Domain Age

11y 2m

Created

06.12.2014

Expires

06.12.2026

Last Updated

11.11.2025

Registrar

NameCheap, Inc.

DNSSEC

Not Enabled

Typography & Readability

ui-sans-serif

90/100

Readability

/30

40/40

16px · LH 1.50

Hierarchy

/20

25/25

4.5x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

ui-sans-serif

Sans72px

Body Font

ui-sans-serif

Sans16px

Contrast Ratio

Reading Comfort

Single Font Family

left aligned

72px

30px

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 4.5x 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.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

FathomSMB

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

3 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cdn.usefathom.com(1)chat.cdn-plain.com(1)

Website Identity

envoyer.io

11 years old

NameCheap, Inc.📧 Fastmail

Sponsored

Last analyzed: 12 Feb 2026 at 15:01

Historical Analysis & Change Tracking