SmartThings + Matter: What It Means If You Mix Brands

Samsung SmartThings and Matter are back in the smart-home conversation this month, after a Smart Home Insider episode with Daniel Moneta — who chairs the Matter marketing subgroup at the Connectivity Standards Alliance and works on SmartThings at Samsung. If you're a SmartThings owner who also has a Google Nest in the kitchen, an Apple HomePod in the bedroom or an Alexa knocking around somewhere, the obvious question is: does any of this actually change my life? Short answer: yes, but not in the way the marketing copy suggests. Here's the plain-English version.

Matter is a smart-home standard that lets devices from different brands talk to each other over your home network — without being locked into one company's app. It launched in late 2022 and is run by the Connectivity Standards Alliance, the same body that runs Zigbee. SmartThings, Apple Home, Google Home and Amazon Alexa all support Matter as controllers, which means a Matter-certified light bulb or plug can be added to any of them — and to all of them at once, if you want.

The reason it keeps coming up is that the rollout has been gradual rather than dramatic. Every few months a new device category gets covered by the spec, another major hub adds support, and another batch of products picks up the "Works with Matter" logo on the box. SmartThings, by virtue of Samsung's deep involvement in the CSA, has been ahead of the curve since day one — so when it leans further in, it's worth a look.

For the fundamentals — what Matter is, who's behind it, what it actually does — start with our plain-English Matter explainer. The rest of this guide assumes you know roughly what Matter is and want to figure out what to do about it as a SmartThings owner.

Three practical things, in rough order of how much they'll change your day-to-day.

1. More devices that "just work" with SmartThings. Any Matter-certified device — bulb, plug, lock, thermostat, blind, sensor — can be added to SmartThings without waiting for Samsung to write a custom integration. The pool of compatible kit keeps growing because device makers only have to certify once for Matter rather than five times for five different ecosystems.

2. The same physical device, in multiple apps at once. This is the feature called Multi-Admin in the spec. You pair a Matter device to SmartThings, then share it with Apple Home, Google Home or Alexa from inside the SmartThings app. The bulb on your ceiling now responds to all of them simultaneously, without any cloud-to-cloud bridge or third-party hub. If different people in your household live in different ecosystems, this is the bit that quietly removes a lot of friction.

3. More options for what acts as the hub. Recent Samsung TVs, Family Hub fridges, the Aeotec Smart Home Hub and the SmartThings Station all act as Matter controllers (and, in some cases, Thread Border Routers). For households that already have a relatively new Samsung TV, the "hub" question often answers itself. If you're not sure whether you need a separate hub at all, our plain-English hub guide covers it.

No — but most households end up with a "primary" app anyway, because that's where you build routines and automations. SmartThings is a perfectly reasonable choice for that primary app, especially if you have Samsung phones, TVs or appliances. The point of Matter isn't that you stop using the apps you like; it's that you stop having to choose devices based on which apps you like.

The practical pattern that works for most mixed-ecosystem households looks like this. Pick one app — SmartThings, Apple Home, Google Home or Alexa — as the place you actually write your "at 10pm, turn the lights off and lock the door" routines. Share the relevant devices to the other apps via Multi-Admin so anyone in the house can ask their preferred voice assistant to turn the kitchen light on. Don't try to keep automations in sync across apps — that way lies madness.

If you're choosing which app to make the primary, our take on the trade-offs is in choosing your smart-home platform. The short version: pick the ecosystem you'll actually open every day.

Three honest caveats, because no smart-home standard is ever as seamless as the keynote suggests.

Device categories are still being added. Matter covers the obvious stuff — lights, plugs, switches, locks, thermostats, blinds, sensors, fans — and now also a growing list of major appliances and EV chargers. But cameras are limited, robot vacuums are limited, and anything genuinely exotic (matrix lighting, irrigation, niche professional kit) probably isn't covered by your hub's current Matter build. Check before you buy.

Multi-Admin works, but pairing it can be fiddly. The mechanics — a one-time QR code, a shared fabric — are sound, but the in-app flows vary between ecosystems and update frequently. If a share doesn't take on the first try, restart the device, restart the app and try again before assuming the device is broken.

Matter doesn't replace the cloud — it just gives you the option of not needing it for local control. Cloud accounts, voice processing and most automations still need an internet connection in practice. If "local-first" is the priority, see our local-first smart-home guide.