Amazon Video (100% free for USA, UK & Canada) – Both seasons are available on Amazon Video and you can sign up for a free 7 day trial with Amazon Prime HBO in 10 seconds

The good thing about using HBO through Amazon Video to watch Westworld is that it is very easy to cancel, so give it a shot!

Some other options you could try to watch Westworld for free (note – these are just suggestions and may not work as we have not tested):