There are a number of reasons companies embark on co-branding programs. To begin with, they're a powerful way of introducing one company's products and services to the loyalists of another. (NewsFactor Network)

The secret to successful co-branding is to stay true to the brand personality and values, and to choose partners carefully-partners who not only share some of those values, but target similar consumer segments to which value added packages will appeal. (Paul Temporal's Asia Branding Tips )

Most common methods of co-branding online is offering your services, data, products under different company’s identity, while preserving your own brand in less dominant format. (LightMix Design Studio Blog)