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Wireless & Consumer

Since the firm’s founding over 20 years ago, we have invested in some of the most innovative and significant technology companies of our time. Sigma knows what it takes to help entrepreneurs turn creative ideas into sustainable businesses.

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Rave Wireless, Inc.
Rave Wireless is the leading provider of reliable safety applications for mobile users. Rave builds, sells and supports the award-winning Rave Alert, Rave Guardian and Rave Campus products that deliver the only two-way safety solution complete with inbound and outbound emergency alerting.
CEO: Tom Axbey
Managing Director: Robert E. Davoli
Framingham, MA
ScanCafe, Inc.
ScanCafe, the world’s premier imagery scanning and restoration service, allows consumers and enterprise to cost effectively and efficiently convert analog media into digital format. ScanCafe loads the digital images into an online gallery for sharing and creation of photo-themed products.
CEO: Sam Allen
Managing Director: Peter Solvik
Burlingame, CA
Vesta Green Marketing Solutions
Vesta GMS offers a full suite of marketing services to meet any brand objective. Our category-exclusive programs provide immediate exposure and sustained in-home presence thats unmatched by other vehicles.
CEO: Jeff Jensen
Managing Director: Robert E. Davoli
New York, NY
Vlingo Corporation
Vlingo has created a dramatically improved user interface for mobile devices using advanced speech recognition technology. The result is a personalized interface which gives users new ways to access a wide variety of mobile applications and content.
CEO: Dave Grannan
Managing Director: Robert E. Davoli
Cambridge, MA