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

snapcraft.io

https://snapcraft.io· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

snapcraft.io

Mobile

Sponsored

Hosting Provider

Canonical Group Limited

IP Address

185.125.190.21

Server Location

🇬🇧 City of London, United Kingdom

ASN

AS41231

Organization

Canonical Group Limited

Server

Nginx

Nameservers

ns3.canonical.com.ns2.canonical.com.ns1.canonical.com.

Performance

Page Speed

365 KB

52 requests

Image Optimization

Lazy LoadResponsiveCloudinary

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Canonical Group Limited

CDN

Cloudinary

Technology Stack

5 Technologies Detected

Other

CSS Frameworks

Analytics

Tag Managers

Web Servers

SEO Analysis

B72/100

snapcraft.iosnapcraft.io

Snapcraft - Snaps are universal Linux packages

Snaps are containerised software packages that are simple to create and install. They auto-update and are safe to run. And because they bundle their dependen...

Description truncated.

Title Length46 chars

Recommended: 50-60 chars

Description Length221 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (27/41)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

Sponsored

A+

Security Score

95%Excellent

Interactive

HTTPS

No WAF

69d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

28.01.2026

Valid Until

28.04.2026

Subject Alternative Names (2)

snapcraft.iowww.snapcraft.io

SHA-256 Fingerprint

BA:03:1B:1A:CF:90:E8:46:D4:FF:65:E2:E3:EF:8E:A4:1D:FD:78:12...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

cache-control

🟡 61s(max-age=61, stale-while-revalidate=300, public, stale-if-err...)

content-encoding

zstd

content-length

17079

content-security-policy

default-src 'self'; img-src data: blob: *; script-src-elem '...

content-type

text/html; charset=utf-8

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mx-misc.canonical.com

Domain Information

snapcraft.io

Domain Age

9y 9m

Created

16.05.2016

Expires

16.05.2026

Last Updated

19.04.2024

Registrar

MarkMonitor Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

Typography & Readability

Ubuntu

81/100

Readability

/30

40/40

18px · LH 1.50

Hierarchy

/20

18/25

2.5x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Ubuntu

Sans45px

Body Font

Ubuntu

Sans18px

Contrast Ratio

Reading Comfort

~38 CPL

Needs attention

45px

18px

45px

18px

Augmented Fourth

Scale

✅ Excellent readability: 18px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.5x 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.

⚠️ Cramped layout: 10 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Enterprise

Marketing Automation

MarketoEnterprise

Email marketing and automation platforms

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

8 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(5)googletagmanager.com(1)assets.ubuntu.com(1)

Website Identity

Facebook X (Twitter)GitHub

Sponsored

Last analyzed: 17 Feb 2026 at 21:34

Historical Analysis & Change Tracking