Nanoleaf's "Aurora" lights are triangular LED panels that change colors on demand. The modular design lets you arrange them on your walls however you like, and with built-in support for Apple HomeKit, you can control them using Siri commands.
New in 2017: Amazon Alexa controls that also let you control the panels by talking to the popular voice assistant that lives within the Amazon Echo smart speaker.
You'll find that same combination of Alexa and Siri support in Nanoleaf's Ivy smart bulbs, too. They don't change colors, but they boast a nerd-approved, 3D-printed jigsaw assembly that puts the diodes on the outside of the bulb, as well as a very nifty dodecahedron-shaped ZigBee hub.
Just make sure you're using the Lutron Bridge to control your gear, because that's the part that brings Siri into play. You can also control Lutron Caseta gadgets using the Wink Hub, but then you'll only get Alexa support.
That also means that you don't actually need to get the most expensive Hue kit in order to get to voice-activated promised land. My personal recommendation: go with the Philips Hue White Starter Kit, which costs just $80 (or £60, if you're in the UK). The bulbs don't change colors, but you can always add in full color bulbs later, a la carte style.
If you don't want to buy newfangled LEDs, then consider the iDevices Socket. It isn't necessarily your most cost effective option, but it'll let you smarten up any light bulb you like, and it works with both Siri and Alexa.
iDevices has some new gear headed our way this year, including this "instant switch" that offers wireless control of other iDevices products. Stick it to your wall, and it'll stick to the Alexa/Siri playbook.
You won't see Nest in this gallery -- it works with Alexa, but not Siri. For access to both, you might want to consider one of Nest's top competitors, Ecobee. Its flagship Ecobee3 smart thermostat was one of the first gadgets to work with both Apple and Amazon's voice assistants.
If you want to save a little money, the Ecobee3 Lite offers that same compatibility with Siri and Alexa for less -- although it doesn't come with any remote sensors, which might be Ecobee's best feature.
Here's another option connected climate control that works with Siri and Alexa: the Honeywell Lyric T5. At $150, it's priced well below options from names like Nest and Ecobee, but it still comes packed with useful smart home integrations. A similar model, the Lyric T6, is available in the UK for £180.
What about smart locks, though? While there are a couple that already work with Siri, only one of them also works with Alexa, and that's the August Smart Lock. It's actually a device that sits over top of your existing deadbolt to turn it automatically when asked.