MatterCheck guides

Plain answers to common Matter questions, built from the same dated, sourced cells as the platform matrix. Each guide links its sources and says how sure we are.

• Does Alexa support Matter leak sensors? The platform-by-platform answer
  Alexa is the weak spot for Matter leak sensors. Here's what pairs, alerts and starts an automation on each of the five platforms, with dated sources. Reviewed 2026-10-19.
• Which smart home platforms support Matter robot vacuums?
  Every platform can pair and control a Matter robot vacuum, but only Google Home, SmartThings and Home Assistant are verified for automations both ways. Apple Home can't use the vacuum as a trigger. Reviewed 2026-10-19.
• Which smart home platforms support Matter smart locks?
  Every platform pairs a Matter lock and can use it to start an automation, but unlocking differs: Google Home needs a PIN and blocks voice unlock, and Alexa routines can lock but not unlock. Reviewed 2026-10-19.
• Which smart home platforms support Matter thermostats?
  Every platform pairs and controls a Matter thermostat and can set it in an automation, but only Google Home, SmartThings and Home Assistant let the thermostat itself start one. Home Assistant is the only High-confidence cell. Reviewed 2026-10-19.
• Which smart home platforms support Matter smoke and CO alarms?
  Every platform pairs a Matter smoke or CO alarm and can use it to start an automation, but none can use it as an action. Alexa only shows basic alarm states, and Apple Home and Alexa stay Med because their official pages don't name smoke alarms. Reviewed 2026-10-19.
• Which smart home platforms support Matter smart plugs?
  Every platform pairs, controls and automates a Matter smart plug. The plug can start an automation on Apple Home, Google Home, SmartThings and Home Assistant, but on Alexa that's still Unknown, with conflicting user reports. Reviewed 2026-10-19.
• Which smart home platforms support Matter motion sensors?
  All five platforms pair a Matter motion or presence sensor and let motion start an automation, all at High confidence. The differences are extras like light level, which Aqara and Meross say Alexa doesn't show. Reviewed 2026-10-19.
• Which smart home platforms support Matter door and window sensors?
  All five platforms pair a Matter door or window sensor, show open/closed and let it start an automation, all at High confidence. Every sensor we track is Thread, so you need a Thread border router. Reviewed 2026-10-19.
• Which smart home platforms support Matter blinds and shades?
  All five platforms pair and control Matter blinds and can open or close them in an automation, but Alexa is the weak spot: routines work only on shades added directly to an Echo, and whether a blind can start a routine is Unknown. Reviewed 2026-10-19.

New guides are added as we write them. For a single device type, the device type pages show every platform cell with its sources.