Eight, which used to be known as Luna, has raised $6 million in seed funding from Y Combinator, Yunqui Partners, Azure Capital, Cota Capital, Comcast Ventures, Vast Ventures, Stanford University, Galvanize Ventures, Y Combinator partner and Scribd co-founder Jared Friedman, and others.

The company has developed a non-wearable sleep tracker that uses health-grade technology to provide tailored data about sleep and take action on behalf of the user to improve sleep conditions. Called Eight Sleep Tracker, the device is compatible with other personal and home smart devices such as fitness trackers and thermostats like Nest.

“We are leveraging the power of data to understand individual sleep patterns and discover what sleep really means to human life,” Matteo Franceschetti, co-founder and CEO of Eight, said in a statement. “It’s exciting to see so much interest in how technology can improve sleep, and we look forward to getting the Eight Sleep Tracker into the hands of our backers and growing the company as the needs of our customers evolve.”

The funding round comes after the New York-based company managed to sell 6,000 units through an Indiegogo crowdfunding campaign and its website. Following the fulfillment of those pre-sale orders, the Eight Sleep Tracker will be available for purchase on Amazon and at eightsleep.com.

Eight will use the funds to accelerate production, develop new products, and finance growth initiatives. Its device will start shipping in early spring 2016, and is available for presale now for a down payment of $99.