Website technology
checker & lookup.

TechnologyChecker.io is a technology intelligence platform built for B2B sales, GTM, and market analysis teams. We provide real-time subscriber and churn signals, 20-year historical data for ICP analysis, and verified decision-maker contacts across 40,000+ technologies and 50M+ domains — including backend and standalone platforms that frontend-only tools miss.

Our platform uses multiple detection methods including HTTP header analysis, JavaScript fingerprinting, HTML parsing, and DNS lookups to accurately identify technologies used by any website.

Seven key differences: (1) Full-stack detection — we detect backend tools like n8n, databases, and standalone platforms like Airtable that Wappalyzer can't see. (2) 40,000+ technologies vs ~8,000. (3) Real-time subscriber & churn signals — know the moment companies adopt or drop any technology. (4) Verified contacts included at $89/month — Wappalyzer requires their $450/month plan. (5) Company + contact data per technology with custom audience exports. (6) 20-year historical data for ICP analysis and churn prediction. (7) Enterprise API, bulk enrichment, and CRM automation — not just a browser extension.

We achieve high accuracy through multi-signal detection combining headless JavaScript rendering, HTTP header analysis, DNS/TLS fingerprinting, library signatures, and infrastructure probing. Our system detects 40,000+ technologies including backend tools and standalone SaaS products. Every detection includes a confidence score, and we continuously validate results across 50M+ domains.

We detect 40,000+ technologies including CMS platforms, ecommerce solutions, analytics tools, marketing automation, CDNs, payment processors, frameworks, programming languages, and hosting providers.

Yes — our historical technology timelines go back to 2008. We built them by analyzing petabytes of Common Crawl archives and data from third-party partners, then matching those records against our 5,000+ technology fingerprints. This gives you roughly 17 years of adoption and churn data per domain, so you can track when companies adopted or dropped any technology over time.

Absolutely. We only analyze publicly accessible website data and signatures. We never access private information and maintain full compliance with GDPR, CCPA, and other privacy regulations.

Sales teams use our platform to identify prospects using specific technologies, track competitor customers, receive alerts when companies switch tools, and access verified contact data for outreach.

Marketing teams leverage TechnologyChecker for competitive analysis, market sizing, identifying integration partners, tracking industry adoption trends, and building targeted prospect lists.

Five primary channels: live web crawling with real browser rendering across 500M+ indexed domains, passive DNS monitoring that detects infrastructure changes within 15 minutes, TLS certificate transparency logs, historical Common Crawl archives going back to 2008, and third-party data partners. High-traffic domains refresh every 24–72 hours. Every detection carries a confidence score so you know exactly how reliable each signal is.

We detect technologies through public-facing signals including DNS records, HTTP headers, TLS certificates, API fingerprints, and code signatures. While purely internal tools with no external-facing components aren't detectable, we identify many backend and standalone platforms — like n8n, Airtable, and databases — through their public infrastructure signatures.