LAUNCH49Limited time offerStop Paying $295/mo for Tech Detection — StackRadar Does It Better, for Free
Detect any website's technology stack in under 2 seconds. Uses only Chrome's activeTab permission. We cannot see your browsing history. 167 technologies across 18 categories, privacy-first, beautifully designed.
Sound familiar?
Enterprise Pricing Wall
BuiltWith charges $295-$995/mo. Wappalyzer charges $250/mo. There's literally nothing between free and $295.
Your Data Is The Product
Wappalyzer crowdsources browsing data from 3M users. SimilarWeb forces you into a 'contributor network' that harvests all browsing data.
Inaccurate Free Tools
WhatRuns gives wrong results half the time. Free BuiltWith shows only 2 technologies. You deserve accurate data without enterprise pricing.
Popup UIs Are Broken
Competitor extensions use popups that close when you click elsewhere. You can't browse and analyze simultaneously.
Everything you need
8-Method Detection Engine
Script sources, meta tags, JS globals, cookies, DOM elements, HTTP headers, CSS classes, and link attributes. 167 rules with multi-signal confidence scoring.
Privacy Score
Every scanned site gets a privacy grade (A-F) showing how many trackers are watching visitors. Built-in privacy awareness.
Side Panel UI
Results display in a persistent side panel — browse the web and see tech stacks simultaneously. No popup that vanishes.
Technology History
Track how websites evolve over time. See when technologies are added or removed with domain-grouped history.
CSV & JSON Export
Export scan results to CSV or JSON for client reports, competitive analysis, or CRM import. Professional-grade output.
Dark Mode
Beautiful light and dark themes with system preference detection. Glassmorphism design that looks stunning either way.
Simple, transparent pricing
Start free, upgrade when you need more power.
Perfect for developers and students
- 10 scans per day
- 167 technology detection
- Privacy score
- 7-day scan history
- Dark mode
For consultants and freelancers
- Unlimited scans
- CSV & JSON export
- Unlimited history
- Technology trends
- Site comparison
- Priority support
For agencies and teams
- Everything in Pro
- Bulk domain scanning
- API access
- Team sharing
- Custom reports
Launch Special — 500 licenses only
Use code LAUNCH49 at checkout
Frequently asked questions
How is StackRadar different from Wappalyzer?
Wappalyzer went closed-source and now crowdsources browsing data from 3M users. StackRadar uses only the activeTab permission — we literally cannot see your browsing history. Plus we're 96% cheaper than BuiltWith.
What technologies can StackRadar detect?
167 technologies across 18 categories: frontend frameworks (React, Vue, Angular, Svelte), CMS (WordPress, Shopify), analytics (GA4, Mixpanel, Segment), servers (Nginx, Apache), CDNs, hosting providers, payment processors, marketing tools, security, chat widgets, and more.
Is my browsing data safe?
Absolutely. StackRadar uses only the activeTab Chrome permission. This means the extension can ONLY access the page you're currently viewing, and ONLY when you click the extension icon. We cannot see your browsing history, bookmarks, or any other tabs.
How does the privacy score work?
After scanning a website, StackRadar identifies tracking technologies (analytics, pixels, session recorders) and generates a privacy grade from A (no trackers) to F (heavy tracking). Each tracker generates a specific privacy concern with severity level.
Can I use StackRadar offline?
Yes! All detection runs locally in your browser. The only network request StackRadar ever makes is for Pro/Business license validation — and only when you activate a license key.
See What Powers The Web
Join thousands of developers, consultants, and agencies who trust StackRadar for accurate, private technology detection.