PostPath is in the business of providing a better email and collaboration infrastructure for users and IT departments.
Matrix, Worldview
Proofpoint is a provider of enterprise-class messaging security solutions that protect organizations from threats and risks.
Benchmark, MDV, Meritech, RRE Ventures
Quellan specializes in building analog components that improve signal integrity by removing channel impairments and noise.
Menlo Ventures
Solidcore provides change control for critical systems that can automate the enforcement of change management policies.
Matrix, Menlo Ventures, Sevin Rosen