O3b Networks, Ltd. is a network communications service provider building and operating a medium Earth orbit satellite constellation. The network combines the relatively large reach of satellite with high speed and medium latency to deliver satellite Internet services and mobile backhaul services to emerging markets. The company was founded by Greg Wyler in 2007. The name "O3b" stands for "[The] Other 3 Billion", referring to the population of the world where broadband Internet is not available without help.
O3b is financially backed by SES, Google, HSBC, Liberty Global, Allen & Company, Northbridge Venture Partners, Soroof International, Development Bank of Southern Africa, Sofina and Satya Capital. In April 2016, SES announced that (subject to regulatory approvals which are expected to be completed by the end of 2016) it will pay $20 million to increase its fully diluted ownership of O3b from 49.1% to 50.5%, taking a controlling share in the company. In May 2016, SES said it would raise another $710 million to purchase all of O3b Networks, exercising a call option with O3b minority shareholders and eliminating the possibility of an O3b stock offering.
O3b is primarily intended to serve mobile operators and Internet service providers, providing for voice and data. The network currently consists of twelve Ka-based satellites in the O3b satellite constellation orbiting at an altitude of 8,000 km, which is less than one quarter of the altitude of geostationary satellites, significantly reducing satellite latency.