We evaluated OpenStack.

I was told about OpenNebula from a friend in the USA. They use it because it is very lightweight, stable, easy to use, and easy to customize. Based on that recommendation, we implemented it and I am personally okay with it.

We looked at OpenStack which offers a lease extension feature that is unavailable with the solution. It also is more well known and used by developers which adds to its market culture. 

For our use case, we found the solution to be the best fit when dealing with infrastructure services. It makes life easier from the infrastructure side. 

The solution's templates make exchanging VMs much easier than the multi-step processes of Azure and AWS.

Compatibility with Terraform CLI and Sunstone UI are a benefit. It is easy to move back and forth between UI and CLI to write commands.

We evaluated OpenStack.

I evaluated CloudStack, but I prefer OpenNebula because of its simplicity, and setting it up is quicker.

In comparison to OpenNebula, OpenStack is very complicated. In OpenStack you deploy nodes that have a lot of models and when you deploy for the first time, it's unclear where to start. Those issues don't exist with OpenNebula. OpenStack is preferable for enterprise companies that already have experienced engineers in virtualization who understand how to transform the cloud from VMware to OpenStack. OpenNebula is easier to integrate into infrastructure in smaller organizations.

It's free. You only need to pay for technical support but we can't use it anyway because of sanctions. 

We evaluated CloudStack before choosing OpenNebula.