What do you like best about the product?

It was very easy for us to switch from AWS EKS Karpenter to CastAI. There Terraform Modules enabled us to integrate it perfectly into our Infrastructure as Code workflows.

We already during the POC, were able to reduce the Instance Costs by arround 30%, so the product payed for itself. Because of that it was very easy to convince the management to buy the product.

Right now we are working together with cast ai to implement vertical and horezontal autoscaling for all our main workloads (Cast ai VPA+ keda HPA).

What do you dislike about the product?

Permission Model needs to be extended. Currently there is no way to give permissions per cluster or namespace. That would be needed for shared responsibility.

What problems is the product solving and how is that benefiting you?

It improves the Cluster Node Scaling and Spot selection. This reduces Instance costs already by arround 30% for us.

We are working on implementing Autoscaling for all our major workloads, by combining cast ai's vertical pod autoscaling and Keda for horezontal autoscaling on application metrics.