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Yes, there is an on-perm version available as part of an enterprise (I believe) tier

Yeah, says "Self-Hosted Available" for Enterprise plan on the pricing page: <https://www.pulumi.com/pricing/>

which is that software thats app server or <http://api.pulumi.com|api.pulumi.com>  in <https://github.com/pulumi/pulumi>

<@UHXLTNU3E> from what I can see, you were being linked to the option to buy self hosted - I don’t believe this is open source but I’m sure one of the team will be able to confirm this

<@UHXLTNU3E> it is not possible to run the Pulumi API service (<https://api.pulumi.com>), which powers <https://app.pulumi.com> locally.

The Pulumi CLI is open-source in <http://github.com/pulumi/pulumi|github.com/pulumi/pulumi>. And you can use the command-line tool to manage stacks without needing to contact the “Pulumi Service”. (i.e. `login --local` like you mentioned.)

But the software powering the Pulumi Service — the APIs used to manage stack updates, persist stack history, browse stack resources, etc. — is not open-source.

Like Josh Bowling mentioned, running a version of the Pulumi Service on-prem is available. But is there some other use-case you are looking to achieve?