I have a Kwikset Kevo that I enjoy. If I have guests they just install the Kevo app and I can send them temporary keys that expire. I don't use the integration, but apparently it's integrated with Alexa.
Sorry, slow to reply. It's a Schlage Sense. Major selling point for me was that it has a keypad, so I can give non-tech savvy folks an easy in (plus backup in case of flat phone). If you don't want that, there are nicer looking one.