# TechnologyChecker.io

## Docs

- [What are the differentiators of TechnologyChecker?](https://technologychecker.io/docs/differentiators.md): Full-stack detection across 40,000+ technologies, real-time subscriber and churn signals, company + contact data per technology, custom audience exports, 20-year historical data for ICP analysis, and verified contacts. See how we compare to Wappalyzer, BuiltWith, 6sense, HG Insights, TheirStack, and…
- [Technology lookup software comparison](https://technologychecker.io/docs/features/comparison.md): Compare TechnologyChecker with Wappalyzer, BuiltWith, 6sense, HG Insights, TheirStack, and Bloomberry. Side-by-side feature matrix, pricing, accuracy, and use-case fit for 2026.
- [Domain to Technologies Lookup](https://technologychecker.io/docs/features/domain-lookup.md): Scan any website to detect its full technology stack — frontend, backend, and standalone platforms. Includes company firmographics and technology adoption timeline.
- [Targeted B2B Lead Lists by Integrating Technology Detection](https://technologychecker.io/docs/features/lead-lists.md): Build targeted B2B prospect lists by combining technology detection with LinkedIn firmographic filters. Export up to 100,000 leads with verified contacts as CSV or JSON. Create custom audiences for LinkedIn, Facebook, and Google Ads.
- [Technology Market Share, Growth & Migration Intelligence](https://technologychecker.io/docs/features/market-research.md): Analyze technology market share, quarterly growth, 20-year adoption trends, ICP patterns, and migration analysis across categories. Compare competing technologies with real data from 50M+ domains. The kind of intelligence HG Insights charges $50K+/year for — starting at $89/month.
- [Our data — how TechnologyChecker detects technologies](https://technologychecker.io/docs/features/our-data.md): Multi-layered crawling infrastructure across 500M+ domains. Live web crawling, passive DNS monitoring, certificate transparency logs, and 18+ years of Common Crawl archives power the deepest technology detection at this price point.
- [Real-Time Technology Buying Signals](https://technologychecker.io/docs/features/signals.md): Real-time subscriber and churn signals when companies adopt, remove, or switch technologies. Includes replacement detection, signal confidence scoring, verified decision-maker contacts, and custom audience exports. Delivered via email, Slack, webhooks, or CRM.
- [Technologies We Track](https://technologychecker.io/docs/features/technologies.md): Browse 40,000+ tracked technologies across 50M+ domains. Explore market share charts, adoption trends, growth rates, and category breakdowns with interactive visualizations.
- [Technology intelligence platform for sales, GTM, and market analysis teams](https://technologychecker.io/docs/index.md): Detect 40,000+ technologies across 50M+ domains. Real-time subscriber and churn signals, verified decision-maker contacts, custom audience exports, and 20+ years of historical data for B2B sales, GTM, and market analysis teams.
- [Quickstart](https://technologychecker.io/docs/quickstart.md): Create your account, scan your first domain, and make your first API call in under 2 minutes. Free tier includes 100 credits with no credit card required.
- [Skill](https://technologychecker.io/docs/skill.md): Technology intelligence API for detecting tech stacks, building lead lists, tracking market trends, and enriching company data. Use when looking up website technologies, finding companies by tech stack, analyzing market share, or enriching CRM data with technographic and firmographic signals.
- [TechnologyChecker use cases](https://technologychecker.io/docs/use-cases.md): How sales teams, GTM teams, market analysts, developers, investors, customer success, and ad operations teams use TechnologyChecker for lead generation, competitive displacement, custom audience targeting, ICP analysis, market research, and churn prevention.

## OpenAPI Specs

- [openapi](https://technologychecker.io/docs/api-reference/openapi.json)

## Optional

- [Dashboard](https://app.technologychecker.io)
- [Pricing](https://technologychecker.io/pricing)
- [Changelog](https://technologychecker.io/updates)
- [About](https://technologychecker.io/about)