Amazon has finally shared some data on how popular the company's Alexa voice assistant technology has become.

Over 100 million Alexa-enabled devices have been sold to consumers, Amazon's senior vice president Dave Limp told The Verge in an interview published on Friday.

But there's a catch to the number. It covers both Amazon-branded devices, such as the Echo Dot, and third-party products built with the voice assistant, a company spokesperson told PCMag.

What proportion of the 100 million figure is made up of Amazon's Echo smart speakers isn't clear. But Limp told The Verge that demand for the products outstripped supplies during the holiday shopping season. For instance, the Echo Dot won't be back in stock on the company's website until February 5.

In the past, Amazon has only mentioned that the company has sold "millions" of Alexa-enabled devices during past holiday shopping seasons without elaborating. Nevertheless, third-party research has found that the company's Echo products currently reign as the most popular smart speakers in the US.

According to Strategy Analytics, the Amazon Echo led the market with a 23 percent share while the Echo Dot came in second place with 21 percent. In third was the Google Home smart speaker, which only had an 8 percent share.

Limp told The Verge that Amazon's Alexa is "by far the leader" when it comes to home assistant technology. Although Google and Apple have their own digital assistants enabled by default on their smartphones, Amazon's goal is to expand Alexa to more areas of the home, to cars, and to the workplace. So expect the e-commerce giant to partner with more companies to bring an even greater collection of Alexa-enabled devices to the market.

"I think someday, third-party Alexa-enabled endpoints may be vastly larger than what we produce ourselves," Limp said in the interview.