Your numbers are a bit off. It's more like 162 bucks a month for a comparable reserved EC2 instance. And 208 a month for a comparable reserved RDS instance. An

Your numbers are a bit off. It's more like 162 bucks a month for a comparable reserved EC2 instance. And 208 a month for a comparable reserved RDS instance. And that's of course with a 12 month commitment. You can't really compare EC2 to an offering like this because you're paying for the amount of time / labor costs it frees up. And of course RDS doesn't support Postgres so there's not a lot of competition at the moment.