The container orchestrator landscape

K8s is more flexible compared to Nomad, but at the cost of complexity. There's a nice page with a description here: https://www.nomadproject.io/docs/nomad-vs-kubernetes

I personally would avoid Nomad right now. It's an "open core" system, with the "enterprise" version locking in some very useful features like multi-region support.

With K8s you can also use EKS on AWS or AKS on Azure to offload running the control plane to AWS/Azure. It's still very heavy on infrastructure that you need to configure, but at least it's straightforward and needs to be done once.