The 25 Most Valuable American Startups That Died In 2018

15. Winx — sleep-therapy systems

Year founded: 2007

Maximum valuation: $115 million

Amount raised: $77 million

Read more about Winx on PitchBook.

14. Alphabet Energy — thermoelectric generators

Year founded: 2009

Maximum valuation: $118 million

Amount raised: $78 million

Read more about Alphabet Energy on PitchBook.

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