Boundary is an access management tool that provides secure management for dynamic infrastructure by providing easy access to all hosts and services through a single workflow based on trusted identity. It offers granular, role-based access controls for any networked resource, allowing users to create custom workflows to extend or replace traditional VPNs or firewalls. The tool has recently released new features such as integration with Open-ID Connect providers like Auth0 and Okta, worker filters that enable session routing, and a desktop app for macOS. Boundary provides a powerful way to manage access to hosts and services in a secure and scalable manner.