Spotinst provides advanced auto scaling and deployment tools for Kubernetes and ECS. It has over 1000 customers and has raised $17 million. Spotinst uses heterogeneous autoscaling across different instance types and auto scales infrastructure and services to ensure SLAs while achieving 60-80% cost savings. The Spotinst autoscaler scales according to cluster needs by detecting insufficient resources and satisfying pod requirements without waiting for thresholds. It also scales down unused instances and maintains a buffer of spare capacity.