- Atrium Capital Corp
- Bedrock Capital Partners
- Elevation Partners
- Guyan Eagle Investment Co
- Harbourton Enterprises
- Hiller Investment Partners
- In-Q-Tel
- Morgan Stanley
- Opus Capital
- Quantum Insight LLC
- Rembrandt Venture Partnership
- Ricoh Silicon Valley
- Sigma Partners
- Sippl Macdonald Ventures I LP
- Technology Venture Investors
- Volpe Investments
