Here are the three that I know of that are equivalent to what Heroku used to offer([1],[2]):
- https://fly.io/pricing (requires credit card)
- https://northflank.com/pricing
- https://www.koyeb.com/pricing
Runners up:
- https://render.com/pricing (sleeps after 15 minutes, 30s spin-up)
- https://qoddi.com/#pricing (no custom domains)
- https://railway.app/pricing (only runs 500hrs/month, but doesn't require credit card)
- https://appliku.com/#pricing (only Django, no custom domains)
Note: Fly.io is the only one of these I have actually used. I like it so far. I plan to migrate my Heroku apps to Fly. Edit: just tried their automatic migration tool ( https://fly.io/launch/heroku ) and it works like a charm!
[1]: https://news.ycombinator.com/item?id=32594533
[2]: https://news.ycombinator.com/item?id=32595589