Akamas is an on-premise product running on a dedicated machine within the customer environment:
on a virtual or physical machine in your data center
on a virtual machine managed running on a cloud, by any cloud provider (e.g. AWS EC2)
on your own laptop
Akamas also provides a Free Trial option which can be requested here.
Refer to your Cloud Provider website for information about cloud hosting options and related cost information.
For AWS EC2 costs visit the EC2 Pricing page and use the AWS Pricing Calculator to estimate the cost for your architecture.