SignalFx

SignalFx is a SaaS-based monitoring and analytics company headquartered in San Mateo, California. It offers capabilities for analyzing, visualizing, automating, and alerting on metrics data from infrastructure, applications, microservices, containers, and functions.^[1][2] The platform uses a streaming architecture that separates metric data into two streams: one for metadata and another for time-series values. These data streams are routed through a publish-subscribe (pub-sub) bus to SignalFlow, an analytics language accessible via the SignalFx GUI and programmable APIs. The platform is designed to can process millions of data points per second millions of data points per second at a 1-second resolution, with latency typically under 2 seconds from ingestion to alerting.^[3][4]

SignalFx

Company type	Subsidiary
Founded	2013; 12 years ago (2013)
Founders	Karthik Rau Phillip Liu
Headquarters	San Mateo, CA
Key people	Karthik Rau (CEO) Mark Cranney (COO)
Number of employees	200+
Parent	Splunk
Website	signalfx.com

History

SignalFx was co-founded by Karthik Rau and Phillip Liu in February 2013. SignalFx received $8.5 million in Series A funding from Andreessen Horowitz, with Ben Horowitz joining its board.^[5] In 2015, SignalFx received $20 million in Series B funding led by Charles River Ventures, with participation from Andreessen Horowitz; Devdutt Yellurkar joined the board.^[6][7][8][9] In May 2018, SignalFx announced its Series D funding of $45 million led by General Catalyst, with participation from existing investors Andreessen Horowitz and Charles River Ventures. In June 2019, the company raised $75 million in its Series E round led by Tiger Global Management, bringing the company's total funding to $179 million.^[10]

SignalFx served customers including Athenahealth, Chairish, Ellie Mae, Carbon black, Kayak, Shutterfly, Sunrun, and Yelp.^[11][12]

SignalFx was acquired by Splunk on August 21, 2019, for $1.05 billion. The acquisition aimed to enhance Splunk's cloud-native observability and APM capabilities, integrating SignalFx into Splunk’s Observability Suite.^[13][14] The acquisition consisted of 60% cash ($630 million) and 40% Splunk common stock (SPLK). The transaction closed on October 2, 2019.^[15]