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.

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axios.com

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

Export

axios.com

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

18.165.140.110

Server Location

🇫🇮 Helsinki, Finland

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns-574.awsdns-07.net.ns-1046.awsdns-02.org.ns-1914.awsdns-47.co.uk.ns-371.awsdns-46.com.

Performance

Page Speed

2 MB

100 requests

0–49

50–89

90–100

Architecture Stack

JAMstack

⚙️ SSR

Decoupled

Frontend

Framework

Next.js

Styling

Tailwind CSS

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

Amazon Web Services (AWS)

CDN

Cloudflare

Detected API Sources

/api/runtime-file?path=RUNTIME...

Technology Stack

9 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel Segment

Meta Frameworks

CSS Frameworks

Tag Managers

Advertising

CDN

SEO Analysis

B76/100

axios.comaxios.com

Axios - Breaking news, U.S. news and politics, and local news

Smart, efficient news worthy of your time, attention, and trust. Covering local news, politics, health, climate, tech, media, business, sports, world, scienc...

Description truncated.

Title Length61 chars

Recommended: 50-60 chars

Description Length168 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (16/23)

3 issues found

Upgrade to view details

Sponsored

Security Score

36%Critical

Interactive

HTTPS

WAF

65d

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-headers

sentry-trace, baggage

cache-control

🔴 No Cache(private, no-cache, no-store, max-age=0, must-revalidate)

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9cc07fccdca418e4-FRA

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=utf-8

Good Warning Issue

Typography & Readability

Atiza + NB International Pro

64/100

Readability

/30

40/40

16px · LH 1.50

Hierarchy

/20

11/25

1x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Atiza

Sans16px

Body Font

NB International Pro

Sans16px

Contrast Ratio

Reading Comfort

~154 CPL

Needs attention

16px

14px

16px

Minor Second

Scale

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

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

✅ Good performance: Using 2 font families keeps load times fast.

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

❌ Very long lines: ~154 chars/line causes eye strain. Use max-width: 65ch.

Buy on MyFonts

Business & Marketing Stack

7 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

SegmentEnterprise

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Social Media

Facebook SDKFree

Twitter/X WidgetsFree

Social widgets and sharing tools

Reviews & Social Proof

TrustpilotMid-Market

Customer reviews and testimonials

Sponsored

Scripts & Styles

22 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(11)cdn.segment.com(3)js.appboycdn.com(1)connect.facebook.net(1)platform.twitter.com(1)

Website Identity

axios.com

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Last analyzed: 11 Feb 2026 at 02:43

Historical Analysis & Change Tracking