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.

Pricing

One URL. Full clarity.
Pick your plan.

Start free with 5 daily analyses. Upgrade to unlock AI insights, exports, bulk analysis, and more. Cancel anytime.

Save 20% with yearly billing

Free

Explore what powers any website — tech stack, performance scores, and security grades.

$0/ forever

Start Analyzing — Free

What's included

5 analyses per day
18 analysis modules with full scores
7,000+ technology & service detection
Public result pages
AI-powered insights & recommendations
Re-analysis (refresh data)
Historical snapshots & change tracking
PDF / JSON export
Ad-free experience

Pro

Unlock AI insights, export reports, and track changes — built for SEO professionals and developers.

$19/ month

$24/mo|$228/yr

Get Pro

What's included

10 analyses per day
Everything in Free
Ad-free experience
AI insights & recommendations50/mo
Re-analysis (refresh data)50/mo
Historical snapshots & change tracking
PDF / JSON export
Comparative reports
White-label reports
Bulk analysis
REST API access
Webhook notifications
Priority analysis queue
Team access

Agency

White-label reports, bulk analysis, API access, and team seats — everything your agency needs.

$79/ month

$99/mo|$948/yr

Get Agency

What's included

50 analyses per day
Everything in Pro
White-label reports (your branding)
AI insights & recommendations250/mo
Re-analysis (refresh data)250/mo
Bulk analysis (50 URLs at once)
Team access (up to 5 users)
Priority analysis queue
REST API (500 req/day)
Webhook notifications

Enterprise

Unlimited everything, SLA guarantee, SSO/SAML, dedicated account manager, on-premise deployment option, and custom integrations. Let's talk.

Contact Sales

Add-ons

Need more credits?

Top up anytime. Credits are available for Pro & Agency plans and expire at the end of each billing cycle.

Re-analysis Credits

$4.99

10 credits

Refresh analysis data on demand

Buy 10 credits

Pro & Agency

AI Insight Credits

$9.99

25 credits

AI-powered improvement recommendations

Buy 25 credits

Pro & Agency

Bulk Analysis Pack

$14.99

50 URLs

Analyze multiple sites at once

Buy 50 URLs

Agency only

Frequently Asked Questions

What counts as an "analysis"?

An analysis is when you analyze a domain that hasn't been analyzed before (not in our database). Viewing an existing cached report does not consume a credit.

Can I cancel anytime?

Yes. All paid plans are month-to-month or yearly. Cancel anytime from your account settings — no questions asked, no hidden fees.

What happens when I hit my daily limit?

You'll see a friendly banner letting you know. Free users can upgrade; Pro users can switch to Agency for higher limits. Daily limits reset at 00:00 UTC.

Do add-on credits roll over?

Add-on credits expire at the end of your current billing cycle. They're designed for occasional top-ups, not long-term storage.

How does the re-analysis feature work?

Re-analysis refreshes the data for a previously analyzed site. Pro and Agency plans include monthly re-analysis credits. You can also purchase additional credits as needed.

Is there a free trial for paid plans?

We don't offer free trials. Instead, our Free plan lets you experience the core product with 5 analyses per day — no credit card required.

Ready to see what's under the hood?

Paste any URL and get a full technical audit in seconds. No credit card needed.

Start Free Analysis Talk to Sales

All plans billed in USD. Payments processed securely by Lemon Squeezy.

One URL. Full clarity.Pick your plan.

Free

Pro

Agency

Enterprise

Need more credits?

Re-analysis Credits

AI Insight Credits

Bulk Analysis Pack

Frequently Asked Questions

Ready to see what's under the hood?

One URL. Full clarity.
Pick your plan.