2010–2018 (primary logo), 2018-2020 (secondary logo)
After Google merged Nest Labs into their hardware division, the former Nest logo is now used as a secondary logo on the Nest app and website.
On May 7, 2019 during Google I/O, Google announced that Google Nest will serve as the blanket branding for Google's home products. Google has discontinued the use of the Google Home naming (with the exception of older products and the iOS/Android app) in favor of Google Nest. They've also changed existing Nest products' naming to have "Google Nest' instead of just 'Nest' (e.g. Google Nest Secure, Google Nest Thermostat, Google Nest Hello).
1Absorbed into Google's hardware division