I switched my company over to Neon from PlanetScale. In part for the ability to scale up/down easily and also so I could run multiple databases on the same cluster.
I also looked at (and spun up) RDS but Neon was way easier to work with and scales to 0 (Aurora Serverless is trash IMHO). Neon starts very quickly as well (hundreds of milliseconds in my testing) which is pretty awesome.