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Nabu Casa joins the Z-Wave Alliance
(www.home-assistant.io)
Home Assistant is open source home automation that puts local control and privacy first. Powered by a worldwide community of tinkerers and DIY enthusiasts. Perfect to run on a Raspberry Pi or a local server. Available for free at home-assistant.io
If I were to choose infrastructure today and only looked at the technology and stability I would choose Z-wave over Zigbee, WIFI and Matter any day.
But... The pricing on Z-wave devices is a showstopper and it will eventually kill it.
Yep, it's because of that proprietary and "every device must be licensed" nature of Z-wave that I use Zigbee devices - I'll pick an open platform everyday over a closed one, even if it has limitations.
The first few devices I bought were z-wave. £40 for the radio, and £40-ish for the devices.
I would not recommend starting that way! I nearly balked at the cost of the radio.
However, it did work out, as my main heating control is z-wave, and stability in that is really important.