The Development single-node instance is designed for individual users and building proof of concept projects, it is not designed to be used for production environments. The Standard cluster is a production-ready multi-node highly available Vault cluster that can support enterprise applications.
HCP Vault Secrets is a more focused Software-as-a-Service (SaaS) offering of HashiCorp Vault that focuses primarily on secrets management and enables users to onboard quicker and is free to get started. HCP Vault is our enterprise offering supporting a broader set of use cases including data encryption and certificate management.
HCP Vault Secrets is available globally and hosted in the US. Some capabilities such as Secret Syncing to AWS will be available for only US regions first.