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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

SignalFx is a SaaS-based monitoring and analytics platform based in San Mateo, California. It allows customers to analyze, visualize, automate, and alert on metrics data from infrastructure, applications, micro-services, containers, and functions.^[1][2] The platform uses a streaming architecture to separate metric data points into two streams: one for metadata, and one for time-series values. These data streams are routed through a pub-sub bus to SignalFlow, an analytics language accessible via the 'SignalFx' GUI and programmable APIs. The platform can handle millions of data points per second at a 1-second resolution, achieving less than 2 seconds of latency from ingestion to alert.^[3][4]

SignalFx was co-founded by Karthik Rau and Phillip Liu in February 2013. SignalFx received $8.5 million in a Series A investment from Andreessen Horowitz, adding Ben Horowitz to its board.^[5] In 2015, SignalFx received $20 million in Series B funding led by Charles River Ventures, with participation from Andreessen Horowitz, adding Devdutt Yellurkar to its board.^[6][7][8][9] In May 2018, SignalFx announced its Series D funding of $45 million led by General Catalyst, with participation from the 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 since its founding.^[10]

SignalFx currently serves over a hundred customers, including Athenahealth, Chairish, Ellie Mae, Carbonblack, Kayak, Shutterfly, Sunrun, and Yelp.^[11][12]

On August 21, 2019, SignalFx was acquired by Splunk for $1 billion.^[13]

SignalFx was acquired by Splunk in 2019 to help improve Splunk's capabilities in cloud-native observability and APM, making it a part of Splunk’s Observability Suite.

Splunk announced plans to acquire SignalFx on August 21, 2019. Splunk agreed to pay $1.05 billion^[14] in two parts, 60% or $630,000,000 in cash, and 40% in Splunk common stock (SPLK). Splunk expected to close the deal in the second half of the 2020 fiscal year. The deal closed on the second day of the 2020 fiscal year, October 2, 2019.^[15]

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