Sensor data platform Samsara confirmed this morning that it had closed a new round of funding from existing investors Andreessen Horowitz and General Catalyst that values the startup at $3.6 billion.

The news was first reported by Cheddar, which spotted a filing with the state of Delaware on December 21 disclosing Samsara’s intent to raise a $100 million round at more than double the valuation it garnered upon its $50 million Series D this March.

“Our growth comes from bringing transformational new technologies to solve the problems of operational businesses, a massive segment of the economy that has long been underserved by the technology industry,” wrote Kiren Sekar, Samsara’s vice president of marketing and products, in the funding announcement. “Today, the advent of inexpensive sensors, high-bandwidth wireless connectivity, smartphones, and cloud computing enable these businesses to fully reap the benefits of 21st century technology.”

Founded in 2015, Samsara supports the transportation, logistics, construction, food production, energy and manufacturing industries with its internet-connected sensor systems, which helps businesses collect data and derive insights to improve the efficiency of physical operations.

The company’s co-founders are Sanjit Biswas and John Bicket, who previously launched Meraki, an enterprise Wi-Fi startup acquired by Cisco in an all-cash $1.2 billion deal in 2012.

Samsara’s latest financing brings the company’s total raised to $230 million. According to PitchBook, Andreessen Howoritz and General Catalyst are the only two private investors in the company, with Marc Andreessen and Hemant Taneja of General Catalyst representing the venture capital firms as lead investors on several Samsara deals.

San Francisco-based Samsara says revenue grew 250 percent in 2018 as its customer base swelled to 5,000. As for how it will deploy the new capital, the company plans to hire 1,000 employees, double down on AI and computer vision technology and open its first East Coast office in Atlanta.

The startup has yet to spend a dime of its last financing round, evidence it, like many other venture-funded startups, is pulling in capital before a market downturn strikes the industry and makes it increasingly difficult to raise hefty sums at impressive valuations.

“While the company already had a healthy balance sheet – we hadn’t dipped into our previous round of funding – the new capital enables us to accelerate long-term product investments and expand into new markets while continuing to maintain a strong balance sheet over the long term,” wrote Sekar.