Insteon has a sale 30% off on switch kits (dimmers and non-dimmers) with code : DBDEAL30. This is the lowest I have seen sale, it was this low at Fourth of July. works with Alexa, works over powerline and RF so it is supposed to be more reliable than the other standards but YMMV. Insteon offers wide variety of switches and controllers, is an older technology but proven. 8 pack normally 339 is now 229 for 8 or 28.62 each - many other combinations of multi-packs check out the links below.
If you have dont have a hub:
Or hub owners (switch packs):