Etsy is an online marketplace that connects buyers and sellers from all around the world. It specializes in handmade and vintage products, as well as unique factory-manufactured items. With millions of active users, Etsy provides a global platform for small and independent businesses to sell their products and reach a broader audience. Etsy's platform includes features such as seller ratings, buyer reviews, and personalized recommendations, which help to ensure a safe and reliable buying experience. Etsy is a trusted and established platform that supports creativity and entrepreneurship, providing a comprehensive suite of tools and resources for businesses to succeed in the e-commerce world.

Cassandra is a free and open-source, distributed, wide-column store, NoSQL database management system designed to handle large amounts of data across many commodity servers, providing high availability with no single point of failure.