Keepa - Price history charts and the option to be alerted on price drops for all Amazon sites.
Camelcamelcamel - Easily monitor Amazon product prices and get alerts when they drop.
Pricepin - Pin products from webshops & get notified when prices drop
Humane AI pin - Take Ai with you everywhere.
PriceGrabber - Get the lowest prices on computers, electronics, furniture, cameras, clothes and more.
HARPA AI - AI-powered Web Monitor that automates websites and monitors prices, articles, brand mentions, competitors, vacancies for you