SignalFx Raises $45 Million in Series D Funding SAN MATEO, Calif., May 22, 2018-- SignalFx, the leader in streaming operational intelligence for data-driven DevOps, today announced $45 million in Series D funding led by General Catalyst with participation from existing investors Andreessen Horowitz and Charles River Ventures. This round brings total funding for SignalFx to $103.5 million since its founding in 2013.