These 13 startups have raised millions — but no one knows what they do

Before a startup launches, it goes through its stealth phase. Often this is a pretty short time before it hits market, but some companies will take years and raise millions along the way before the public learns what they're doing. 

CB Insights, a venture capital data firm, assembled a list of the top-funded stealth companies that haven't opened to the public yet. We excluded one name, Jut, because it has already opened up its beta to the public. 

To be considered among the most well funded, the company had to actively raise money in the last two years and raise at least $10 million. 

Here are the companies that have raked in millions even though the public has no idea what they do:

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12. Globality (tied)

Amount raised: $10 million

Investors: 14 angel investors including Al Gore, Sheryl Sandberg, and Yahoo CFO Ken Goldman

What we know: With high-profile investors already behind it, Globality wants to change way companies do business around the globe by "Combining A.I. with domain expertise."

In an interview with TechCrunch, cofounder Joel Hyatt was both extremely vague and ambitious about its plans to change the world's economic structure. "We’re going to facilitate global trade on the part of far more companies than are currently involved in exporting both goods and services, which are critical to the U.S. economy and critical to the GDP. The vast 90 percent of export comes from one percent of companies, these large industrial conglomerates and international service firms,"Hyatt told TechCrunch.

12. Dremio (tied)

Amount raised: $10 million

Investors: Lightspeed Venture Partners, Redpoint Ventures

What we know: Dremio is founded by two former MapR employees who want to "enable organizations to unlock the value of their data." The duo developed the Apache Drill open-source project and hope Dremio will continue to develop open-source software, according to Venture Beat.

11. Hyperscience

Amount raised: $10.9 million

Investors: Firstmark Capital, High Line Venture Partners, Slow Ventures

What we know: The only New York-based company to make the list, Hyperscience wants to bring artificial intelligence to enterprises. Not much is known about the company, but it's supposed to get smarter with each enterprise customer over time, says one of its investors. Its "about us" page on its website lists only random stats, like the average age of its employees is 31.7 and two people on the team like tennis.