Flexible Reservations (or Flex RIs), are a new way to save at least 80% of what you’d be saving with convertible reservations or saving plans. With Flex RIs, you’ll eliminate lock-in risk for your less predictable workloads by making commitments in one-month intervals.

You will realize 80%+ of the discount granted by the applicable AWS Reserved Instance 1-year full upfront commitment.

For example, AWS grants a 19.5% discount on RIs from the m5 instance family in the us-west-1 region. By comparison, a DoiT FlexRI for this machine/region combination will provide you with a 15.6% (19.5% * 0.8) discount but without the need to commit for an entire year. How about them apples!

Unlike with RIs or Saving Plans, which require at least 50% upfront payment to get large(r) discounts, you never pay anything upfront with Flex RIs.

Here is another example when comparing discounts: a 1-year Saving Plan, a 1-year (convertible) RI, and finally a DoiT Flex RI. See the table below, DoiT Flex RI provides an effective 32.80% discount versus on-demand pricing of m5.xlarge instance, making it more cost-effective than even the Saving Plan option!