# Exstats > Exstats is a browser extension analytics platform that crawls Chrome Web Store, Edge Add-ons, and Firefox Add-ons daily, collecting ratings, users, reviews, categories, rankings, and more for 280,000+ extensions. It helps extension developers and marketers track performance, monitor competitors, research the market, and set up alerts — all from one dashboard. Key concepts: - A **Product** groups listings of the same extension across different stores (e.g. Chrome + Edge + Firefox) and optionally includes competitor extensions for side-by-side comparison - A **Listing** is a specific extension in a specific store — the atomic unit of tracked data - An **Alert** is a monitoring rule attached to a listing that notifies you on changes (rating drops, ranking shifts, field updates) via email or Slack, on a daily/weekly/monthly schedule - **Tracked Keywords** are search terms attached to a product, used to monitor your extension's ranking position in store search results across all three stores - Store metrics differ: Chrome shows weekly active users, Edge shows active install count, Firefox shows average daily users — Exstats shows each as-is without combining them ## Platform - [Products](https://app.exstats.com/products): Create products that group your extension listings across Chrome, Edge, and Firefox. Add competitors. View performance charts, reviews, keyword rankings, and alerts per product. - [Explorer](https://app.exstats.com/explorer): Browse 280,000+ extensions with 30+ filterable and sortable columns including daily deltas (1D, 7D, 30D). Export to CSV/XLSX. - [Trends](https://app.exstats.com/trends): Store-level analytics dashboard showing total extensions, developers, users, review activity, category breakdowns, growing extensions, and rating distributions over time. - [Alerts](https://app.exstats.com/alerts): Manage all alerts across all products in one place. Configure rules (field + condition + value), frequency, and delivery channels. ## Pricing - [Pricing](https://exstats.com/#pricing): Free Starter plan, Pro at $16/mo (billed annually, or $19/mo monthly), Business at $39/mo (billed annually, or $49/mo monthly). Free 7-day Pro trial, no credit card required. Enterprise plans available on request. ## Optional - [Blog](https://exstats.com/blog): Insights, guides, and data on browser extension analytics and growth. - [Features](https://exstats.com/#features): Overview of all platform features. - [FAQ](https://exstats.com/#faq): Frequently asked questions about supported stores, data sources, update frequency, regions, and billing. - [Terms of Service](https://exstats.com/terms): Legal terms of service. - [Privacy Policy](https://exstats.com/privacy): Privacy policy.