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Website technology
checker & lookup.

Know what tech your prospects use. Know when they switch. Know who to call. 40K+ technologies, 50M+ domains, real-time alerts, verified contacts.

50M+ enriched domains · 40K+ technologies tracked · Live detection for any website

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Trusted by leading teams from Generative AI, Hosting, Payments, Streaming

Technology Detection

Tech stack profiles that reveal opportunities.

Multi-signal fingerprinting with headless rendering for accurate technology identification.

  • Headless JS rendering & asset fingerprinting
  • Bulk lookups up to 100,000 rows
Contact Intelligence

Verified contacts that convert better.

Entity resolution connects domains to decision-makers with verified email deliverability.

  • Firmographics, role & seniority targeting
  • Intent keywords and stack fit scoring
Full-Stack Detection

Go beyond browser-visible libraries.

Detect backend infrastructure and standalone tools that signal real buying intent.

  • Backend: n8n, Zapier, Make, databases
  • Standalone: Airtable, Notion, Coda
Alerts & Signals

Intelligence you can act on.

Real-time alerts and CRM automation turn technology signals into revenue opportunities.

  • Real-time stack change monitoring
  • 24/7 monitoring & bulk enrichment
Historical Intelligence

Built for insight. Scaled for trends.

The deepest dataset in the industry—full-stack visibility across frontend, backend, and standalone tools.

  • Timeline view of stack changes
  • Cohort and vendor adoption curves
Enterprise Platform

Built for B2B sales workflows.

Industrial-strength tools that integrate with your entire workflow.

  • Enterprise API & CRM automation
  • SOC 2, GDPR & CCPA compliant
From the Blog

Blog, insights
and more.

Stay up to date with the latest in technology detection, market trends, and product updates.

View all articles

Customers see instant results.

Shane Murphy
"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

TechnologyChecker's backend detection caught that 73% of our churned customers switched to Workday within 90 days—tools like Wappalyzer would never see that. Now we get real-time alerts when prospects adopt competing HR platforms and have verified contacts to reach decision-makers immediately.
Luca Rossi

Luca Rossi

Head of Customer Success, Horilla

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

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

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

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

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

James Wilson

Head of Marketing Operations, DemandFlow

Frequently
asked questions.

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