There are several leaders in the e-commerce website industry, including:

Amazon: Amazon is one of the largest e-commerce companies in the world, offering a wide range of products and services to customers globally.

Alibaba: Alibaba is a Chinese e-commerce company that operates a massive online and mobile commerce platform.

eBay: eBay is an online auction and shopping website that allows people and businesses to buy and sell a wide variety of goods and services globally.

Walmart: Walmart is a retail giant that operates an e-commerce website that offers a wide range of products, from groceries to electronics.

Shopify: Shopify is a leading e-commerce platform that provides small and medium-sized businesses with the tools and services they need to build and operate successful online stores.

These companies are leaders in the e-commerce industry because of their scale, customer reach, and ability to offer a wide range of products and services to customers globally. They continue to innovate and invest in new technologies and capabilities to improve the e-commerce experience for their customers.