Bandwidth is a Communications Platform as a Service (CPaaS) company that provides cloud-based voice, messaging, and emergency services APIs to large enterprises and cloud communications platforms. Unlike most CPaaS providers, Bandwidth owns and operates its own global all-IP communications network spanning more than 65 countries, rather than reselling third-party carrier capacity — a structural advantage that drives high incremental gross margins. Bandwidth's customers fall into two groups: cloud communications platform providers (UCaaS and CCaaS companies like Microsoft, Google, Zoom, and Cisco) that embed Bandwidth's infrastructure into their own products, and large enterprises that connect directly to run contact centers and employee communications. Voice accounts for roughly 60% of revenue, with programmable messaging making up the remaining ~40%. Bandwidth charges primarily on a usage basis — per-minute voice and per-message fees — so revenue scales with call and message volumes on its network. On top of that usage layer, Bandwidth sells higher-margin software add-ons, most notably its Maestro orchestration platform, which lets enterprises integrate and manage voice flows across multiple CCaaS, UCaaS, and AI providers. Maestro is now attached to every large enterprise deal and is Bandwidth's primary vehicle for monetizing AI voice adoption. Enterprise voice is Bandwidth's fastest-growing segment, with zero customer churn in FY25, and generates gross margins roughly 20 percentage points above the company average. Bandwidth's longer-term growth thesis centers on AI voice applications, which management argues could generate 3-4x the network revenue of a standard voice call due to simultaneous media streams.