Ecway Technologies provides software development and engineering services with offices across multiple cities in Tamil Nadu, India. They propose an efficient and scalable server architecture called Presence Cloud to support large-scale mobile presence services for social network applications. Presence Cloud organizes presence servers into a quorum-based architecture for efficient searching of users' presence information like status and location. It leverages a directed search algorithm and caching to achieve small constant search latency. Simulations show that Presence Cloud reduces the search cost in terms of number of messages generated while maintaining search satisfaction levels for finding friends' presence information.