Savings Plans offers significant savings over On Demand, just like EC2 RIs, but automatically reduce your bills on compute usage across any AWS region, even as usage changes. This provides you the flexibility to use the compute option that best suits your needs and continue to save money, all without having to perform exchanges or modifications.
Compute Savings Plans, which provides savings up to 66% (just like Convertible RIs), automatically reduce your cost on any EC2 instance usage regardless of region, instance family, size, OS, tenancy and even on AWS Fargate or AWS Lambda. EC2 Instance Savings Plans, which provide savings up to 72% (just like Standard RIs), automatically save you money on any instance usage within a given EC2 instance family in a chosen region (e.g. M5 in N. Virginia) regardless of size, OS or tenancy.