[danjac]

What has kept me from trying fly.io is that you need to sign up with a credit card before trying out the service. So when evaluating a bunch of options for a company, I ignored fly because I'd either need to use the company card (a hassle) or use my own card (another hassle especially if having to deal with expenses). Yes it was supposedly "free tier" but there was no indication of whether it was possible, even accidentally, to exceed the free tier - for example leaving a forgotten app running. Gave me bad AWS vibes.

All the other services (heroku, render, railway) let me try out at least a toy app without having to use a card. That allowed me to evaluate whether the service was compatible with our needs without any further commitment.