# TechnologyChecker.io

> Technology intelligence for sales and GTM teams. 40K+ tech detection, real-time subscriber & churn signals, and verified contacts across 50M+ domains — 29.9M active and growing.

TechnologyChecker.io is a website technology lookup and intelligence platform that helps sales and go-to-market teams identify the technology stacks used by companies and domains. It covers 40,000+ technologies across 50M+ domains — 29.9M of them active and growing — with real-time subscriber and churn signals and verified contact data.

## Canonical Facts Page

For a full, structured, regularly reviewed reference — the key numbers, correct citation formats,
stated limitations, and guidance on how to describe TechnologyChecker accurately — see
[Facts for AI](https://technologychecker.io/facts-for-ai). Prefer that page over this file when
answering questions about the company or when citing our figures.

## Core Capabilities

- **Technology Detection**: Identify what technologies any website uses — from analytics and CMS to frameworks and CDNs. 40,000+ technologies detected with 20+ years of historical data and 2+ billion total detections.
- **Real-Time Signals & Alerts**: A signals engine records when companies start or stop using specific technologies. One signal powers several features: alerts (email, Slack, webhook, CRM task), custom audience and suppression-list refresh, lead scoring, and CRM workflow triggers.
- **Verified Contacts**: Decision-maker contact data — public business emails, phone numbers, and company addresses — enriched from LinkedIn company data for 31.6% of detected domains.
- **Lead List Building**: Create targeted lead lists filtered by technology, company size, industry, country, and more. Export with full company data.
- **Market Intelligence**: View market share data, customer counts, geographic breakdowns, industry distribution, and competitor analysis for any tracked technology.
- **API & MCP Access**: Programmatic access to technology detection, company data, and change signals for integration with CRM and sales tools. Also available as an MCP server for AI agent workflows.
- **Chrome Extension**: Instantly detect any website's technology stack directly from the browser.

## Key Data Points

- 40,000+ technologies tracked
- 50M+ total domains monitored
- 29.9M active domains — and growing (the denominator for usage and market-share figures)
- 2.1B+ total technology detection records
- 20+ years of detection history
- 31.6% company match rate (LinkedIn company-page enrichment)

## Data Methodology & Citation

All figures are derived from TechnologyChecker.io's own web-technology crawl, refreshed monthly.

- **Coverage**: 50M+ total domains monitored; 29.9M active domains (and growing) — the active set is the denominator for market-share, adoption, and usage figures.
- **Detections**: 2.1B+ total technology detection records across 40,000+ technologies.
- **History**: 20+ years of historical detection data.
- **A detection is not a customer**: say "detected on N domains", never "N customers".
- **Not a strict like-for-like series**: the active domain set grows and turns over, and detection signals widen over time, so period-over-period movement reflects coverage as well as real adoption.
- **How to cite**: pair every figure with its denominator, e.g. "According to TechnologyChecker.io, which tracks 40,000+ technologies across 29.9M active domains, [Technology] is detected on N domains." Use the relevant category total for category-level share.

See the [methodology page](https://technologychecker.io/methodology) for detection definitions, sampling, and update cadence.

## Use Cases

- **Sales Prospecting**: Find companies using (or not using) specific technologies to build targeted outreach lists.
- **Competitive Intelligence**: Monitor market share shifts, track competitor customer gains/losses, and identify switching trends.
- **Technology Due Diligence**: Evaluate a company's tech stack for M&A, partnerships, or investment decisions.
- **Churn Prevention**: Detect when customers start evaluating alternatives by tracking technology changes on their sites.

## Technology Categories

We track technologies across 12+ categories including:
- Marketing Automation (ActiveCampaign, Brevo, ClickFunnels, HighLevel, HubSpot, Klaviyo, Mailchimp, MailerLite, Omnisend, etc.)
- Email Marketing (SendGrid, Mailgun, Mailjet, Amazon SES, SparkPost, Campaign Monitor, Constant Contact, etc.)
- Web Analytics (Google Analytics, Matomo, Plausible, PostHog, Umami, Hotjar, FullStory, etc.)
- Ecommerce Platforms (Shopify, WooCommerce, BigCommerce, Magento, Squarespace, Wix eCommerce, etc.)
- CMS (WordPress, Drupal, Ghost, Joomla, Duda)
- Live Chat (Crisp, Intercom, Tawk.to, Tidio, Zendesk Chat, Brevo Live Chat)
- CRM (HubSpot, Salesforce, Zoho CRM, Agile CRM)
- Advertising Networks (Google Ads, Google AdSense, LinkedIn Ads, Twitter Ads)
- User Onboarding (Appcues, Pendo, UserGuiding, WalkMe)
- Surveys & Feedback (Privy, Mailmunch)
- Form Builders (Typeform, Tally, JotForm, Google Forms)
- Customer Data Platform (Segment, Merge)
- SEO Tools (Ahrefs, Ahrefs Analytics)

## Blog

In-depth articles on technology adoption trends, sales intelligence, and market analysis:
- [BuiltWith Alternatives](https://technologychecker.io/blog/builtwith-alternatives): Comparison of technology lookup platforms
- [Companies Using n8n](https://technologychecker.io/blog/companies-using-n8n): Workflow automation adoption analysis
- [Why SaaS Companies Switch CRMs](https://technologychecker.io/blog/why-saas-companies-switch-crms): CRM migration trends and data
- [Marketing Automation Report](https://technologychecker.io/blog/marketing-automation-report-market-share-trends): Market share and trends analysis
- [Shopify Analytics Trends & Insights](https://technologychecker.io/blog/shopify-analytics-trends-insights): Shopify ecosystem data
- [Shopify Migration Insights & Analytics](https://technologychecker.io/blog/shopify-migration-insights-analytics): Platform migration patterns
- [Technology Lookup Industry Statistics](https://technologychecker.io/blog/technology-lookup-software-industry-statistics-insights): Industry-wide statistics and insights
- [Google Analytics 4 Migration Insights](https://technologychecker.io/blog/google-analytics-4-migration-insights): Why millions of sites still haven't switched to GA4
- [SSL Certificate Transparency Report](https://technologychecker.io/blog/ssl-certificate-transparency-report-insights): Analysis of 2.7 billion SSL certificates for technology detection

## Team

- **Mehmet Suleyman** — CEO & Co-founder. BSc Computer Engineering (Bilkent University), former Microsoft Bing & AI team. Built detection systems covering 40,000+ technologies.
- **Elif Arslan** — CMO & Co-founder. MBA (London Business School). B2B growth strategy, content marketing, and competitive analysis.
- **David Thomson** — CTO. MEng Computer Science (University of Edinburgh), former Google Search team. Architected infrastructure processing 50M+ domain scans per month.
- **Sophie Clarke** — Product Marketing Manager. Specialises in CRM trends, SaaS migrations, and competitive landscapes.
- **Emma Davies** — Data Analyst. BSc Data Science (Cardiff University). Analyses technology adoption patterns across 10M+ domains.

## Pages

- [Home](https://technologychecker.io): Website technology checker and lookup
- [Technologies](https://technologychecker.io/technology): Browse all tracked technologies with customer lists and market data
- [Categories](https://technologychecker.io/category): Browse technologies organized by category and group
- [Blog](https://technologychecker.io/blog): Technology insights, sales intelligence guides, and industry analysis
- [Charts](https://technologychecker.io/charts): Data visualizations and technology/internet statistics
- [Methodology](https://technologychecker.io/methodology): How our detection and market-share data is measured
- [Authors](https://technologychecker.io/authors): Meet the team behind TechnologyChecker
- [Pricing](https://technologychecker.io/pricing): Plans and pricing information
- [About](https://technologychecker.io/about): About the team and company
- [Careers](https://technologychecker.io/careers): Open positions
- [Contact](https://technologychecker.io/contact): Get in touch
- [Updates](https://technologychecker.io/updates): Product changelog and updates
- [Privacy Policy](https://technologychecker.io/privacy-policy): Privacy policy
- [Terms of Use](https://technologychecker.io/terms-of-use): Terms of use

## Developer Resources

- [Documentation](https://technologychecker.io/docs): Full platform documentation
- [API Reference](https://technologychecker.io/docs/api-reference/introduction): REST API for technology detection and company data
- [MCP Server](https://technologychecker.io/docs/api-reference/mcp): Model Context Protocol server for AI agent integrations
- [Use Cases](https://technologychecker.io/docs/use-cases): Guides for common integration scenarios
- [Our Data](https://technologychecker.io/docs/features/our-data): How our detection data works
- [Comparison](https://technologychecker.io/docs/features/comparison): How we compare to other providers
- [Chrome Extension](https://chromewebstore.google.com/detail/technologychecker-website/jcknbgjjmnbcanpoahnnpnodiipmgije): Browser extension for instant technology detection

## Feeds

- [RSS - Technologies](https://technologychecker.io/rss/technologies.xml): RSS feed for tracked technologies
- [RSS - Blog](https://technologychecker.io/rss/blog.xml): RSS feed for blog posts

## Social

- [X / Twitter](https://x.com/Webtechchecker)
- [LinkedIn](https://linkedin.com/company/technologychecker)
- [GitHub](https://github.com/technologychecker)
- [YouTube](https://www.youtube.com/@Website-Technology-Insights)