Nest revealed that it would soon work with Amazon’s Echo speaker last month and a report from Re/code said that the Nest division while it would surely love to was not currently working on a competing product.
Rumored details are just that at the moment, but it wouldn’t be a stretch of the imagination to think that maybe the Google OnHub team is working on a future product.
Tony Fadell went on record saying the Google OnHub was a “collaborative effort between the two companies” ultimately using Nest’s Thread technology. The Google OnHub featured some of the same functionality that another Nest product a yet to be announced wireless hub codenamed Flintstone was supposed to provide.
Source: Google OnHub