Altiostar, A Rakuten Symphony Company

Altiostar, a U.S.-based mobile technology firm, specializes in 4G and 5G open virtualized Radio Access Network (Open vRAN) software.

Founded in 2011 and now a subsidiary of Rakuten Symphony, Altiostar focuses on enabling disaggregated, multi-vendor, cloud-based mobile networks. The company is headquartered in San Mateo, California, with additional offices in Tewksbury, Massachusetts, and global R&D centers in several countries, including India, the UK, Japan, Italy, and Mexico. Altiostar's core product is its Open vRAN software, which virtualizes radio access baseband functions and supports open interfaces for equipment integration. This technology is designed to create scalable and cost-efficient mobile networks, disrupting traditional telecom markets. Altiostar primarily targets mobile network operators, enterprises, and governments, with notable deployments in Rakuten Mobile's network in Japan. The company also fosters partnerships among major operators to promote the adoption of open RAN infrastructure globally.