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It depends on your architecture and what you consider “secure”. Another factor is regulation, you might be legally obliged to isolate your infrastructure etc. Could you elaborate a little bit more?

Ideally I would like to isolate everything if cost was no issue, but since it is startup capital I want to ensure I spend less and still get a secure architecture. I know that I can secure communication between services with access keys and OAuth 2, but I am unsure if this is enough. My system involves customer data that needs to be protected but is not that sensitive other than it needs to be compliant with GDPR. I am not legally bound to do isolation. What would you choose yourself? If I went with AWS I would have isolation (VPC) included with most services at the same cost, however I am not experienced in using that.

If you are deploying to VMs and don’t need fancy cloud features why not use https://www.hetzner.com/cloud ?

That is certainly also an option. I just like working with Azure, but I might need to consider this. Digital Ocean would also be a good alternative. Ideally I want to spend as little time on maintaining servers as possible which is why I like to provision everything with code 🙂 Thanks for your view on this.