Clearstone Venture Partners is a venture capital firm specializing in incubation, startup, seed, and early stage investments. It also prefers to make later round investments in highly successful companies already backed by other venture capital firms with whom it has prior relationships. The firm seeks to invest in technology markets, including software, consumer, enterprise infrastructure, enterprise computing, storage, communications, wireless and optical communications, data center, enterprise software, security, micro-processors, imaging and transformative infrastructure, semiconductors, advanced optics, and consumer and business internet sector. Within enterprise software, it focuses on new application models and service oriented architectures; open source solutions; web-based application delivery models including software as functional media; and Microsoft exchange as a platform for enterprise collaboration. Within consumer sector, the firm seeks to invest in mobile phone applications, wireless multimedia, social networking applied to commerce, and where there is a broad intersection of technology and consumer activity. Within communications, it focuses on IP telephony, seamless wireless: integration of cell and WiFi, and services. Within data center, the firm seeks to invest in virtualization and utilization for scalability and performance. It prefers to invest in companies located near its offices. The firm prefers to invest between $1 million and $15 million and could go for further investments in special situations. It also finances companies for 18 to 24 months worth of working capital between rounds of financing.