Bandwidth Inc BAND

Media & TelecomMarket cap $2B2 connections

Bandwidth provides communications APIs (voice, messaging, 911 services) to enterprise software companies. When Zoom, RingCentral, or Microsoft Teams needs to make real phone calls, they use carriers like Bandwidth for the underlying PSTN connectivity. It's the wholesale telecom infrastructure beneath enterprise communications.

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Customers 2

Companies Bandwidth Inc sells to

MicrosoftTechnology · $3.8TMicrosoft Teams Direct Routing via Bandwidth
ZoomTechnology · $27BZoom uses Bandwidth for PSTN calling infrastructure

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Relationships are compiled by VexMap from company filings, announcements and reporting, and last reviewed September 2026. Spotted something wrong? Tell us. Not investment advice.