Azure and GCP both offer startup credits if you're incorporated, more if you've raised funding or have revenue. Not sure about AWS.

You don’t have to be incorporated for Azure startup program. Sole proprietor LLC works fine. It’s kind of an insane deal… $125k credits for a $150 LLC and a YouTube demo.

Not aware of any well-maintained lists, but here's one I've applied to: https://blog.cloudflare.com/expanding-cloudflares-startup-pr...

There are some commercial offerings with collections of cloud credits, trials etc:

- https://www.founderpass.com

- https://www.joinsecret.com

- https://www.startups.com/perks/partners

- https://www.f6s.com/software