BuiltWith - Find out the technology behind websites
Kompyte - Track & analyze competitors in real time.
Competera - Competera is a price tracking tool for performance-oriented eCommerce retail and brands of all sizes worldwide.
Akita - Software to help companies retain customers & grow revenue 💰
App Annie - App Annie is a marketing analytics tool available for apps of all kinds. With App Annie, you can track sales, traffic, and a variety of other factors pertinent to monitoring an app's trajectory.
Beyond Pricing - Automatic Pricing for your Airbnb