[satvikpendem]

I can't tell if this is satire or not with the first sentence and the "0 users" parts of your comment, but I know several solo devs with millions of users who self host their database and apps as well.

[da02]

What hosting providers do they use/recommend?

[satvikpendem]

I believe they use Hetzner although there are some comparison sites too: https://serverlist.dev