Cumulus Networks was a computer software company headquartered in Mountain View, California, US.

The company designed and sold a Linux operating system for industry standard network switches, along with management software, for large datacenter, cloud computing, and enterprise environments.

[4][5][6] The company is backed by Andreessen Horowitz, Battery Ventures, Sequoia Capital, Peter Wagner and 4 of the 5 original VMware founders.

[10] On June 20, 2019, the company announced the departure of co-founder JR Rivers, who had been the original CEO and, since March 2016, the CTO.

[1] Cumulus Linux was their open Linux-based networking operating system for bare metal switches.

[14] NetQ is network state validation software, used during regular operations and for post-mortem diagnostic analysis.