Founder: Matt Lauzon, 25
Year founded: 2010
Location: Lexington, MA
2010 Revenue: Undisclosed
2011 Projected Revenue: Undisclosed
If Matt Lauzon has his way, his online custom jewelry company will one day "take on Tiffany's head to head." That may seem like a bold prediction, but consider that Gemvara, which is just more than a year old, had a $10 million run rate at the end of last year and, as of this spring, is venture capital funded to the tune of MORE THAN $25 million. Gemvara allows consumers to customize jewelry by design, stone, and metal, and offers more than a billion styles from which to choose.