https://fly.io and https://vultr.com

I used Fly as a modern successor to Heroku (I know Heroku is still around). Features are good, scaling to 0 is great, their networking stuff is solid, and pricing is fair. I generally use it to host application backends.

Vultr for when I want a long lived server or build my own infrastructure platforms. I use it as just a VPS provider for larger machines at reasonable costs. Caveat being I’m managing my own infrastructure with all the trade-offs that come with it.