Mblox (now Sinch) | 4,592 followers on LinkedIn. Now part of Sinch. See Sinch.com. www.linkedin.com/company/sinch | Mblox was the largest independent cloud based mobile messaging provider in the world, trusted by more companies to carry their mission-critical traffic than any other service. Mblox was acquired in 2016 and rebranded in 2017 and is now part of Sinch.