21Ventures was a venture capital firm founded in 2003 and based in New York, United States. The firm focused on investments in clean technology, energy, and software sectors, providing seed, early-stage, growth-stage, and bridge capital. With approximately $250 million under management as of 2009, 21Ventures typically invested between $1 million and $5 million per company. Notable investments included Advanced Telemetry, BioPetroClean, ETV Motors, and Variable Wind Solutions