Seems like a clone of https://www.usage.ai which has been on the frontpage a few times recently, but just undercutting the finders fee - I guess that's the "other providers that charge you egregious fees"
Vantage is trying to more philosophically align with the customer and provide the lowest cost possible at 5% of the savings found. These are ultimately your savings and you should have as much of them as possible.
Lastly, this is just one feature we provide in addition to the other cost visibility features listed at https://vantage.sh/ under the "features" tab. Vantage also has cost visibility support for GCP, Fastly and other providers of Azure, Snowflake and Datadog on the way.