Namebase is a company that offers a marketplace and registry for Handshake (HNS) domains, which are a key component of the decentralized web. Users can buy, sell, and use Handshake domains, which provide ownership and control over top-level domains (TLDs). The company also offers services such as wrapped HNS, earning opportunities, and developer tools. Namebase aims to enable a censorship-resistant and user-controlled internet infrastructure.