Only some of the providers are based on Terraform. I think it would be incorrect to say it's "powered by Terraform."

Thanks all. I'll add it to my ToDo list for checking out. :)

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Actually, on second thought it sounds like the platform they're built on top of (Terraform) is now undergoing some fundamental business model changes.

Probably best to see how that plays out first. :/

It is not powered by Terraform AFAIK

Not sure why you're so insistent on this when Pulumi folks themselves on this post have said that they contribute back up to the AWS provider source repo (1).

Maybe not all their providers utilize Terraform, but it was definitely how their product started out. When you run Pulimi using their AWS provider and get errors at runtime, some of those are verbatim Terraform errors.

Their docs and site is very clear to muddle this connection but if you ever used their API, you'd know this.

(1): https://news.ycombinator.com/item?id=37081306

As far as I know Pulumi is not powered by Terraform underneath.