According to Starling, all models of Nest Thermostat, Nest Temperature Sensor, Nest Protect, Nest Cam Indoor / Outdoor / IQ, Nest Hello, Nest Yale Lock and Google Nest Hub Max are included in the list of compatible devices in the Nest range. The company does state that the Home app will present the’ This accessory is not HomeKit certified’ when you add these devices through their hub. So essentially the Starling Hub seems to be a HomeBridge tool, explicitly designed to work with Nest items. While this isn’t exactly a surprise, as Nest products are part of Google’s own smart home product line, it allows people who already have a suite of Nest devices to attach them to HomeKit and keep them connected to their Google Nest / Home / Assistant setup.
Nest Hello, the popular video doorbell, is also listed by the company. While this product is competitively priced, you hoped to get a cheap doorbell compatible with HomeKit at around US$ 200 this way, you still have to add in the Starling Hub at US$ 89, which takes the cost to around US$ 290-300 price point. Not bad yet, but with the likelihood that the Netatmo Doorbell rumored to be retailing at about the same price, buying something that is officially compatible with HomeKit may be wise, unless you have one of course.
You can find more info on the Starling Hub at their website – starlinghome.io