Oracle offer quite a compelling free trial.
I got a VM for 30 days with 16 gigabytes (!) of RAM and it didn't cost me a penny. In fact, the machine continued working for a few months after the trial ended, which I thought was very generous. They just blocked port 80 and 443 inbound.
They even have a high-touch sales process where a real person sends you emails and replies when you send them questions. Imagine that at AWS!
I was actually tempted to keep paying for the VM from Oracle, but the high-touch sales person literally could not tell me how much it was going to cost. She could point me towards the price calculator page, but the VM type I had been given in my free trial did not exist in their price calculator. I asked for just a simple number: how much is this going to cost me per month? She could not give me an answer. So I didn't buy it. I still have no idea whether it would have been a good deal or not.