> Open Source SDK

> The SDK is a CLI and collection of libraries for defining and deploying cloud apps and infrastructure in code.

https://www.pulumi.com/pricing/

With Terraform the open source CLI and libraries for defining and deploying infrastructure are fully usable, even for large systems.

What I would like to know is, how usable Pulumi is without a paid subscription?

I thought when I first looked at Pulumi, the only non-local state backend was the paid Pulumi Service. But looking at it now, they seem to support the normal object store backends that Terraform does (https://www.pulumi.com/docs/intro/concepts/state/). Though the talk at lack of concurrency control seems to imply they don't support locking like Terraform does.