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.
Check website technology free.
Trusted by some of the biggest companies
Checking website technology made simple.
Better prospect targeting
Find decision-makers fast. Connect stack signals to verified contacts.
Improved competitive analysis
Track competitor moves. Spot market opportunities first.
Increased conversion rates
Target with context. Convert prospects into customers faster.
Cost savings
Eliminate research overhead. Focus resources on qualified leads.
Get actionable technology intelligence in 3 simple steps.
Enter domain or keyword
Instant tech stack scan
Review enriched profile
Verify technology signals
Export to CRM
Qualified leads automated.
Technology Detection
Tech stack profiles that reveal opportunities.
Multi-signal fingerprinting with headless rendering for accurate technology identification.
Headless JS rendering & asset fingerprinting
HTTP header / DNS / TLS detection
Library, framework, platform signatures
Confidence scoring & ambiguity handling
Bulk lookups up to 100,000 rows
CSV/XLSX/API ingestion & export
Contact Intelligence
Verified contacts that convert better.
Entity resolution connects domains to decision-makers with verified email deliverability.
Firmographics (size, industry, location)
Role/department targeting
Role/department targeting
Social/profile links integration
Traffic markers & engagement signals
Intent keywords and stack fit scoring
Historical Intelligence
Built for insight. Scaled for trends.
The deepest dataset in the industry. Frontend, backend (n8n, custom APIs), and standalone tools (Airtable, Notion)—full-stack visibility.
Timeline view of stack changes
Cohort and vendor adoption curves
Competitor stack change diffs
Market segmentation by technology
Historical export (CSV/API)
Custom time windows & cohorts
ALERTS & SIGNALS
Intelligence you can act on.
Real-time alerts and CRM automation turn technology signals into revenue opportunities.
Real-time stack change monitoring
Stack change detection (frontend + backend)
Scan any domain instantly
Bulk enrichment
Process thousands of leads efficiently
24/7 monitoring
One-click detection
Scan any domain instantly
Bulk enrichment
Process thousands of leads.
24/7 monitoring
Watching for changes.
Real-time alerts
Know about opportunities.
Customers see instant results.
"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
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
Head of Growth, Userguiding
"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
Head of Customer Success - Horilla
"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
"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
"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
"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
Frequently asked questions.
What is TechnologyChecker.io?
How does TechnologyChecker work?
What makes TechnologyChecker different from Wappalyzer?
How accurate is your technology detection?
What types of technologies can you detect?
Do you have historical data?
Do you comply with GDPR and privacy regulations?
How can sales teams use TechnologyChecker.io?
What about marketing and growth teams?
Where does your data come from?
What about private or internal tools?
Turn tech stack into revenue.
Start detecting technology stacks instantly—verified contacts included. Free trial, no commitment.
Get Started
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.
Check website technology free.
Trusted by some of the biggest companies
Checking website technology made simple.
Better prospect targeting
Find decision-makers fast. Connect stack signals to verified contacts.
Improved competitive analysis
Track competitor moves. Spot market opportunities first.
Increased conversion rates
Target with context. Convert prospects into customers faster.
Cost savings
Eliminate research overhead. Focus resources on qualified leads.
Get actionable technology intelligence in 3 simple steps.
Enter domain or keyword
Instant tech stack scan
Review enriched profile
Verify technology signals
Export to CRM
Qualified leads automated.
Technology Detection
Tech stack profiles that reveal opportunities.
Multi-signal fingerprinting with headless rendering for accurate technology identification.
Headless JS rendering & asset fingerprinting
HTTP header / DNS / TLS detection
Library, framework, platform signatures
Confidence scoring & ambiguity handling
Bulk lookups up to 100,000 rows
CSV/XLSX/API ingestion & export
Contact Intelligence
Verified contacts that convert better.
Entity resolution connects domains to decision-makers with verified email deliverability.
Firmographics (size, industry, location)
Role/department targeting
Role/department targeting
Social/profile links integration
Traffic markers & engagement signals
Intent keywords and stack fit scoring
Historical Intelligence
Built for insight. Scaled for trends.
The deepest dataset in the industry. Frontend, backend (n8n, custom APIs), and standalone tools (Airtable, Notion)—full-stack visibility.
Timeline view of stack changes
Cohort and vendor adoption curves
Competitor stack change diffs
Market segmentation by technology
Historical export (CSV/API)
Custom time windows & cohorts
ALERTS & SIGNALS
Intelligence you can act on.
Real-time alerts and CRM automation turn technology signals into revenue opportunities.
Real-time stack change monitoring
Stack change detection (frontend + backend)
Scan any domain instantly
Bulk enrichment
Process thousands of leads efficiently
24/7 monitoring
One-click detection
Scan any domain instantly
Bulk enrichment
Process thousands of leads.
24/7 monitoring
Watching for changes.
Real-time alerts
Know about opportunities.
Customers see instant results.
"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
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
Head of Growth, Userguiding
"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
Head of Customer Success - Horilla
"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
"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
"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
"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
Frequently asked questions.
What is TechnologyChecker.io?
How does TechnologyChecker work?
What makes TechnologyChecker different from Wappalyzer?
How accurate is your technology detection?
What types of technologies can you detect?
Do you have historical data?
Do you comply with GDPR and privacy regulations?
How can sales teams use TechnologyChecker.io?
What about marketing and growth teams?
Where does your data come from?
What about private or internal tools?
Turn tech stack into revenue.
Start detecting technology stacks instantly—verified contacts included. Free trial, no commitment.
Get Started
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.
Check website technology free.
Trusted by some of the biggest companies
Checking website technology made simple.
Better prospect targeting
Find decision-makers fast. Connect stack signals to verified contacts.
Improved competitive analysis
Track competitor moves. Spot market opportunities first.
Increased conversion rates
Target with context. Convert prospects into customers faster.
Cost savings
Eliminate research overhead. Focus resources on qualified leads.
Get actionable technology intelligence in 3 simple steps.
Enter domain or keyword
Instant tech stack scan
Review enriched profile
Verify technology signals
Export to CRM
Qualified leads automated.
Technology Detection
Tech stack profiles that reveal opportunities.
Multi-signal fingerprinting with headless rendering for accurate technology identification.
Headless JS rendering & asset fingerprinting
HTTP header / DNS / TLS detection
Library, framework, platform signatures
Confidence scoring & ambiguity handling
Bulk lookups up to 100,000 rows
CSV/XLSX/API ingestion & export
Contact Intelligence
Verified contacts that convert better.
Entity resolution connects domains to decision-makers with verified email deliverability.
Firmographics (size, industry, location)
Role/department targeting
Role/department targeting
Social/profile links integration
Traffic markers & engagement signals
Intent keywords and stack fit scoring
Historical Intelligence
Built for insight. Scaled for trends.
The deepest dataset in the industry. Frontend, backend (n8n, custom APIs), and standalone tools (Airtable, Notion)—full-stack visibility.
Timeline view of stack changes
Cohort and vendor adoption curves
Competitor stack change diffs
Market segmentation by technology
Historical export (CSV/API)
Custom time windows & cohorts
ALERTS & SIGNALS
Intelligence you can act on.
Real-time alerts and CRM automation turn technology signals into revenue opportunities.
Real-time stack change monitoring
Stack change detection (frontend + backend)
Scan any domain instantly
Bulk enrichment
Process thousands of leads efficiently
24/7 monitoring
One-click detection
Scan any domain instantly
Bulk enrichment
Process thousands of leads.
24/7 monitoring
Watching for changes.
Real-time alerts
Know about opportunities.
Customers see instant results.
"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
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
Head of Growth, Userguiding
"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
Head of Customer Success - Horilla
"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
"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
"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
"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
Frequently asked questions.
What is TechnologyChecker.io?
How does TechnologyChecker work?
What makes TechnologyChecker different from Wappalyzer?
How accurate is your technology detection?
What types of technologies can you detect?
Do you have historical data?
Do you comply with GDPR and privacy regulations?
How can sales teams use TechnologyChecker.io?
What about marketing and growth teams?
Where does your data come from?
What about private or internal tools?
Turn tech stack into revenue.
Start detecting technology stacks instantly—verified contacts included. Free trial, no commitment.
Get Started