Leave things as they are
If you're not having any major issues this is what we'd actually recommend.
That said, the Cloud gives you agility you just can't get with on-premise hardware, and most workloads are well-suited for the Cloud. Having a Cloud migration strategy is a good thing.
Buy from somewhere else
This is of course an option. Note that many companies who offer Cloud migration assessments have partnered with big Cloud vendors (AWS, Azure, GCP) and get benefits if they manage to migrate you there.
Our goal is to provide you with a pragmatic roadmap that tells which Cloud suits you best, what things make most sense to migrate now and what later, and what should be kept on-premise.
Our roadmap will pay particular attention to IaC and DevOps workflow and culture which enable you to succeed in the long run.
It will also tell you whether moving to the "latest and greatest" technologies (for example) Kubernetes, is the right choice for you, or if they're just bloat.
Do it yourself
If you have a really good DevOps team with solid IaC understanding and good leader ship you should not be on this page. Instead, we suggest reading our blog instead :).
On the other hand if you don't have IaC/DevOps experience then navigating a Cloud migration can be tough. You will learn through trial and error which takes time. Our roadmap is meant to speed this process up significantly.