# Bandwidth, Sinch, Telnyx, Infobip, and Bird

Study notes. Not vendor documentation and not legal advice.

- Wikipedia calls Bandwidth an American CPaaS company that provides APIs for voice calling, text messaging, and emergency services, founded in 1999 and headquartered in Raleigh.
- The Bandwidth home page that opened lists Voice API, Messaging API with SMS, MMS, and RCS, Emergency Calling API, WebRTC API, and Authentication API.
- Wikipedia calls Sinch, formerly CLX Communications, a CPaaS company for messaging, voice, and email, headquartered in Stockholm.
- Wikipedia calls Telnyx a licensed telecommunications carrier, founded in Chicago in 2009 and headquartered in Austin, with tools for voice, text, email, wireless, and real-time AI.
- Infobip's article says the company was founded in Vodnjan in 2006. Bird's docs say email, SMS, and WhatsApp share one platform. A Wikipedia article titled MessageBird returned HTTP 404.

Make five index cards. On each card write only the sentence this room cites. If a card wants a price or a founding year you did not read, write confirm.