Kazoo is a scalable, distributed, cloud-based telephony platform that allows you to build powerful telephony applications with a rich set of APIs.

Designed to handle anything from large carrier to small countries, the Whistle infrastructure can do it all. There are no lock-ins and the software is open-source to give you complete freedom.

Services include:
- Complete redundancy and failover between data centers
- Complete replication of all data
- Use of Map/Reduce algorithms inside NoSQL databases
- Multi-master replication and caching of registrations, active channels and call lookups
- Load balancing built-in
- Event driven messaging for managing and using calls
- A complete REST interface for implementing call flow features