We have been working with Zesty (former Cloudvisor) for several years. The main difference in the competitive market is that all of their solutions are fully automated and adapted to the client's AWS infrastructure. Easy integration, good dashboard, and perfect support. Zesty allows to track the saving in real-time that is helpful for analysis and forecast whenever you need it. I strongly recommend them when someone comes up with a question "how to optimize out AWS costs"?

What I like best, besides the significant cost savings Zesty is able to provide us, is that the system is completely effortless. Zesty is an automatic system that purchases and sells commitments, based on our actual usage, this is really amazing. We don't need to forecast our EC2 usage anymore, Zesty is doing it independently for us, and always gets the best discounts on the RI marketplace.

Fast, simple, savings, support, and ease of use