Arlo All-in-One Sensor vs Ring Alarm Motion Detector

Alarm-system pedigree pays off here: the Ring Alarm Motion Detector gets the better of the Arlo All-in-One Sensor overall on owner rating, connectivity and integrations, even as Arlo answers with a lower price and a sensor package that layers ambient light and temperature onto plain motion detection. The Ring Alarm Motion Detector is a Z-Wave device at heart, so beyond the Ring Alarm system itself it also pairs with third-party Z-Wave hubs like SmartThings, and it reaches Alexa, Home Assistant and IFTTT along the way, a wider net than the Arlo All-in-One Sensor manages with just Google Home and Alexa. Both need a hub of their own before they can do anything: the Ring Alarm Motion Detector wants a Ring Alarm base station (or a Z-Wave hub), while the Arlo All-in-One Sensor has no standalone Wi-Fi, Bluetooth, Zigbee, Z-Wave or Thread radio and instead depends on a compatible Arlo Security System hub or keypad. Ring's sensor is also well known for tolerating pets up to about 50 pounds, a nuance the Arlo All-in-One Sensor's spec sheet does not address. Homes already running Ring Alarm, especially with pets, should pick the Ring Alarm Motion Detector; those who want the lower-cost option that also senses light and temperature inside an Arlo or Google/Alexa household should choose the Arlo All-in-One Sensor instead.