Nexuss.io is a centralized platform for managing multi-cloud infrastructure. Users can securely register and link their server accounts from providers such as VMware, AWS, Google Cloud, and Azure by adding their secret keys, access keys, and access IDs. Nexuss.io pulls detailed server data from these accounts, enabling users to manage and monitor their cloud resources seamlessly. With features for billing management, simulation capabilities, and client management, users can generate invoices and directly send billing to clients, making cloud resource management more streamlined and efficient.