Infrastructure, Instantly. Railway feels a bit like Heroku to me, but if you need a Postgres, MySQL, Redis, or Mongo database, along with hosting for your app, then Railway is a contender. They have a free plan with a cap of $5 on usage. They charge by the minute, so you can certainly experiment with everything using that, or even host some lightweight services. They seem to have specific support for running Discord bots. If you are willing to give a credit card and take the risk of running over, their Developer plan gives you $10 free before being charged.