Leonid Systems | 116 followers on LinkedIn. Leonid Systems provides modern business support solutions to some of the world's largest communications service providers, enabling them to embrace the cloud for themselves and their customers. Leonids' solutions include a unique OSS that extends industry leading CRM platforms into complete lead to cash management system, VoIP provisioning systems that deploy in days not weeks and a fraction of the cost of traditional systems, enhanced VoIP user portal, and VoIP analytics.