Pepperdata surveyed 750 senior enterprise IT professionals in industries ranging from finance to healthcare, automotive, advertising and other data-intensive businesses. One in 12 respondents said their cloud spend was expected to be over budget by more than 40 percent. 47 percent of respondents are using a private cloud; 21 percent are in the public cloud; 28 percent use a combination of both. Cloud services that are fully optimized and running on extended periods (over six weeks) can save more than 20% per service within two weeks.
Source: https://www.helpnetsecurity.com/2021/02/03/cloud-budget-overruns/