"...To help readers get a handle on this fast-changing scene, BusinessWeek teamed up with GreenBiz.com, a green business information service. We don't promise any will blossom into the next Google (GOOG) or Cisco Systems (CSCO). And because they are private, there are no public data on cash flow or profits. But innovators on the list have the brainpower, intellectual property, and ambition to play a role in the coming energy revolution. Since the focus here is strictly under-the-radar, we have excluded famous green startups such as battery maker A123 and electric-car ventures Tesla Motors and Better Place. But like those well-publicized players, all the ones on this list have lined up significant venture backing. "These are companies that, so far, have survived the gauntlet of fund-raising, R&D, and the economic downturn," explains Joel Makower, executive editor of GreenBiz.com, a unit of Greener World Media.... Continue Reading..."
I always found it tough to find companies as reference during design studio's. There are 25 in the article to start your research!