TechnologyChecker.io is a website technology checker & lookup tool that detects 40,000+ technologies across 50M+ domains. Know what tech your prospects use, when they subscribe or churn, who to call, and how to target them — with real-time signals and verified contacts.
50M+ tracked domains · 40K+ technologies tracked · Live detection for any website
Multi-signal fingerprinting with headless rendering for accurate technology identification.
See which companies use any technology AND who the decision-makers are — with verified emails ready for outreach or ad targeting.
Detect backend infrastructure and standalone tools that signal real buying intent.
Know the moment companies adopt or drop any technology. Act during active buying windows — not weeks later.
Combine historical patterns with live monitoring to build ICP profiles, predict churn, and analyze market trends.
Industrial-strength tools that integrate with your entire workflow.
Multi-signal fingerprinting with headless rendering for accurate technology identification.
Know the moment companies adopt or drop any technology. Act during active buying windows — not weeks later.
See which companies use any technology AND who the decision-makers are — with verified emails ready for outreach or ad targeting.
Combine historical patterns with live monitoring to build ICP profiles, predict churn, and analyze market trends.
Detect backend infrastructure and standalone tools that signal real buying intent.
Industrial-strength tools that integrate with your entire workflow.
Stay up to date with the latest in technology detection, market trends, and product updates. Written by our team of industry experts.
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What technologies do law practice companies actually use? We analyzed 66,536 law practice domains and broke down adoption by company size: small businesses, mid-market, and enterprise.
What technologies do software development companies actually use? We analyzed 176,114 software development domains and broke down adoption by company size: small businesses, mid-market, and enterprise.
We process 80% of global CT logs — 2.7B certificates/month — to detect backend technologies invisible to competitors. See the full 2026 CA market share, RSA vs ECDSA trends, and what certificates reveal about tech stacks.
"With Technologychecker's 20-year dataset, we discovered that SaaS companies switching from WordPress to headless CMS averaged 78% faster site speeds and 23% better conversion rates—historical context that completely changed our technical positioning"
Shane Murphy
Head of Product Marketing, Webflow
“At Scrape.do, we rely on TechnologyChecker.io as a key part of our sales prospecting workflow. It helps us identify websites using specific firewall technologies, which lets us target prospects who are most likely to benefit from our scraping infrastructure. The data quality is solid and it's become a reliable signal for our outreach campaigns in the data product and web scraping space. Highly recommend it for any B2B team doing technology-based prospecting.”
Batuhan Ozyon
Founder, Scrape.do
“We've completely transformed our ICP targeting with TechnologyChecker's technographic data. Being able to see exactly which tools prospects are using has increased our conversion rates by 40%.”
Mert Aktas
Head of Growth, Userguiding
“Knowing that BambooHR was capturing 45% of our SMB churn helped us launch a targeted retention program that cut small business churn in half.”
Maya Thompson
Head of Growth, PeopleOps Pro
“The historical data is incredible—we can predict which companies are likely to churn based on technology adoption patterns. Our retention campaigns are now data-driven instead of reactive.”
Sarah Martinez
Growth Operations Manager, CustomerFlow
“We used TechnologyChecker.io to analyze 500+ companies that switched from legacy HRIS to modern platforms—the insights shaped our entire go-to-market strategy for enterprise accounts.”
Nia Patel
VP of Sales, NextGen Agency
“We've built custom lead scoring models using TechnologyChecker.io's API data. Our MQLs are now 60% more likely to convert because we're scoring based on actual technology fit.”
James Wilson
Head of Marketing Operations, DemandFlow
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.
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