Are you specifically looking for something free? Or are you just trying to avoid waking up to a massive credit card charge?
If you don't get a lot of traffic, I'd go for an Amazon LightSail instance. $5/month includes 1 TB of data transfer. If you really don't like AWS, Digital Ocean has similar offerings.
Does AWS allow you to pay with pre-paid Visa/MC cards? Could use one of those to pay for the account to avoid a surprise bill from draining your bank account.
Ideally something that doesn't need a credit card to register, yet has paid tiers to allow scaling up if there's demand. A prepaid credit card sounds like a decent idea; if I had less money in my TransferWise then I could probably use that.
If you don't get a lot of traffic, I'd go for an Amazon LightSail instance. $5/month includes 1 TB of data transfer. If you really don't like AWS, Digital Ocean has similar offerings.
Does AWS allow you to pay with pre-paid Visa/MC cards? Could use one of those to pay for the account to avoid a surprise bill from draining your bank account.