PeerSpot users compared the pricing plans of various Contact Center Platforms, but only after considering other key features: the highest ranked considerations included open standards to allow for simple integration, user-friendly interface usability, and number/quality of features. Reliability such as call drop rates and security also ranked high as features that should be included in a quality Contact Center Platform. Intuitive call routing, customization, and reporting were also mentioned...
My advice is to get in touch with a recommended business partner (with at least Gold status).