Amazon has confirmed its virtual assistant Echo speakers are coming to the UK, Germany and Austria.
Until now, the company sold its voice-controlled devices only in the US.
The machines can answer questions, control other internet-connected devices, build shopping lists and link in to dozens of third-party services including Spotify, Uber and BBC News.
Experts say they appeal to early adopters' sense of curiosity but tend to be a harder sell to others.
"[Echo's] been relatively successful in the US because it is so easy to use," said Jessica Ekholm from the Gartner consultancy.
"But for many the question remains: why would they want a smart home?"
Privacy campaigners have also raised concerns about the use of such listening technology.
Amazon told a press conference in London that the devices would become available in the three European countries on 28 September.
The main Echo speaker will cost £149.99/€179.99, and there is a short-term discount for Amazon Prime subscribers who pre-order the hardware before Friday.
