Third-party support will open up fully "early next year". Though with some partner developers having already been working with Google for some time, there's a good chance we could see new functionality hit the speaker before the year is out.
Google Home gatekeepers
Essentially, whereas Alexa is an opt-in centralised offering, letting users download its voice activated "Skills" as and when they want to increase the device's capabilities, Google Home will make all third-party functions open to all users when they become available.
That's because Google Home will actually play host to many separate "Actions" from multiple developers - so if you use a third-party keyword as a trigger, you'll jump from Google's chat bot to, say, Uber's or Spotify's. The thinking here is that each service will be better able to serve the kinds of conversations its users expect to have than Google can.
It's an interesting approach that brings its own complications. Without selecting Actions manually from some kind of app store equivalent, how will Google Home users know what new functions are on offer? And how will Google categorise which keywords should be associated with what brands and services? Will the biggest players be able to buy or squat on the most valuable Google Home trigger terms, pushing out worthy competition to less natural phrases?
Along with Alexa, it's a whole new age for a whole new wave of devices. The convenience is welcome - here's hoping it doesn't come at the cost of choice or transparency.