Cerillion Skyline is a powerful Software-as-a-Service (SaaS) billing application for the next generation of subscription and usage-based services. Designed specifically for the cloud, but built on more than 20 years' experience delivering high performance on-premise billing and transaction processing systems, Cerillion Skyline is scalable to support from a few thousand to many millions of subscriptions and is available for both public cloud and private cloud deployments.