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

blockchain.com

https://blockchain.com· First analyzed 13 Feb 2026· Updated 13 Feb 2026

Export

blockchain.com

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.17.172.30

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

beth.ns.cloudflare.com.jay.ns.cloudflare.com.

Performance

Page Speed

708 KB

82 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Hybrid

🔀 Hybrid

Frontend

Framework

Next.js

CMS

Medium

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

14 Technologies Detected

Analytics

Advertising

Twitter Ads TikTok Pixel Snapchat Pixel

Meta Frameworks

CSS Frameworks

Icon Libraries

Fonts

Tag Managers

CDN

Email Marketing

SEO Analysis

B78/100

blockchain.comblockchain.com

Blockchain.com | Be early to the future of finance

Buy Bitcoin, Ethereum, and other cryptocurrencies on a platform trusted by millions.

Title Length50 chars

Recommended: 50-60 chars

Description Length84 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (24/46)

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

113 URLs

robots.txt

18 rules

Sitemap reference found

Allows all crawlers

Sponsored

Security Score

81%Very Good

Interactive

HTTPS

WAF

255d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

25.09.2025

Valid Until

26.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (7)

www.blockchain.comblockchain.infows.blockchain.infoapi.blockchain.infologin.blockchain.comapi.blockchain.combps.blockchain.com

SHA-256 Fingerprint

A7:F0:DE:39:FB:63:5F:27:FB:24:96:48:D8:A2:1B:D4:1C:A9:CE:A6...

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 600s(public, max-age=600)

cf-cache-status

HIT

cf-ray🇩🇪 Frankfurt

9cd54615d85bdbff-FRA

content-encoding

⚡ Brotli(br)

content-security-policy

default-src 'self'; script-src 'self' 'strict-dynamic' 'nonc...

content-type

text/html; charset=utf-8

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (5)

alt1.aspmx.l.google.com

alt3.aspmx.l.google.com

alt4.aspmx.l.google.com

aspmx.l.google.com

+1 more

Domain Information

blockchain.com

Domain Age

14y 11m

Created

08.03.2011

Expires

08.03.2027

Last Updated

08.12.2025

Registrar

Cloudflare, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Legitimate interest basis mentioned

Typography & Readability

-apple-system

80/100

Readability

/30

32/40

15px · LH 1.50

Hierarchy

/20

25/25

3.2x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

-apple-system

Sans48px

Body Font

-apple-system

Sans15px

Contrast Ratio

Reading Comfort

~34 CPL

Needs attention

48px

40px

16px

15px

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 3.2x 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 overlay for readability.

Buy on MyFonts

Business & Marketing Stack

10 Tools Detected

Enterprise

Behavior Analytics

HotjarMid-Market

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Twitter/X AdsMid-Market

TikTok PixelMid-Market

Reddit PixelMid-Market

Snapchat PixelMid-Market

Quora PixelMid-Market

Ad platforms and retargeting pixels

Privacy & Cookies

CookiebotMid-Market

Cookie consent and privacy compliance tools

Social Media

Twitter/X WidgetsFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

22 Resources

Scripts

Styles

Async

Defer

Top Script Sources

analytics.tiktok.com(3)googletagmanager.com(3)d2hrivdxn8ekm8.cloudfront.net(2)consent.cookiebot.com(2)acdn.adnxs.com(1)

Website Identity

blockchain.com

14 years old

Cloudflare, Inc.📧 Google Workspace

Social Profiles

Facebook X (Twitter)Instagram LinkedIn GitHub

Sponsored

Last analyzed: 13 Feb 2026 at 15:14

Historical Analysis & Change Tracking