Sinch

Sinch provides a cloud communications platform that reaches every mobile phone on the planet via SMS, voice, and messaging APIs.

Sinch powers global engagement through a Tier 1 network connected to 600+ mobile operators. The platform handles 700 billion engagements annually (delivering SMS, voice, email, and video) for enterprises like Google and Visa. Developers use their REST APIs to integrate two-factor authentication, automated alerts, and rich messaging (RCS and WhatsApp) into existing tech stacks. By owning the underlying routing infrastructure rather than just reselling access, Sinch ensures high delivery rates and low latency for mission-critical communications.

https://www.sinch.com