As stated on the product description, Google Assistant and Amazon Alexa are supposedly available. Apparently, only Bixby seems to be in the options on mine with the latest firmware (in Switzerland).
Could anyone confirm if you managed to set up something else than Bixby?

Question

As stated on the product description, Google Assistant and Amazon Alexa are supposedly available. Apparently, only Bixby seems to be in the options on mine with the latest firmware (in Switzerland).
Could anyone confirm if you managed to set up something else than Bixby?

Answer

Samsung Electronics GmbH 
Hello antoinexp,
please discuss this with our colleagues from technical support in Switzerland. They gladly support you if you call them at 0800 726 786 (Mo - Fr: 8 AM - 8 PM | Sa: 9 AM - 5 PM).
Kind regards,
Your Samsung Service Team

Answer

I've only setup Bixby. Not sure if/how Google Assistant and Amazon Alexa would be integrated with it. Maybe through Bluetooth? :)

Samsung Support says this about Alexa setup:
https://www.samsung.com/us/support/answer/ANS00087622/

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Question about Samsung QE55Q60T

As stated on the product description, Google Assistant and Amazon Alexa are supposedly available. Apparently, only Bixby seems to be in the options on mine with the latest firmware (in Switzerland). Could anyone confirm if you managed to set up something else than Bixby?