The Web 3.0 era, also known as the decentralized web, is characterized by the integration of blockchain technology and decentralized protocols into various industries. 

While the Web 3 e-commerce industry is still in its early stages, several companies are exploring the potential of this technology.

Here are a few examples of Web 3 e-commerce companies:

OpenSea

OpenSea is a decentralized marketplace for non-fungible tokens (NFTs). It allows users to buy, sell, and trade digital assets securely on the Ethereum blockchain.

Rarible

Rarible is another NFT marketplace that operates on the Ethereum blockchain. It enables creators to mint, sell, and auction their digital artworks and collectibles directly to buyers.

Origin Protocol

Origin Protocol is a platform that enables decentralized peer-to-peer marketplaces. It allows developers to build their own decentralized applications (DApps) for various e-commerce use cases, such as rentals, services, and e-commerce stores.

BigchainDB

BigchainDB is a blockchain database provider that allows businesses to create and manage decentralized applications. It offers features like immutability, transparency, and security, which can be utilized in the e-commerce industry.

Ujo Music

Ujo Music is a blockchain-based platform that aims to revolutionize the music industry. It allows artists to distribute and sell their music directly to fans without intermediaries, ensuring fair compensation and transparency.

Brave Browser

While not a direct e-commerce company, Brave Browser is a privacy-focused web browser that integrates blockchain technology. It provides users with the option to earn cryptocurrency (BAT - Basic Attention Token) by opting into privacy-respecting ads and supports micropayments for content creators.

It's worth noting that the Web 3 e-commerce industry is still evolving, and new companies are continually emerging as the technology advances.