Lagom underneath uses Akka, it seems like a neat way to create microservices and provides good frameworks to stand up a microservice in a short time and provide some good practises. While Temporal is more focused on Workflow/Service Orchestration part, it can help making sure different calls to different microservices are reliable and processing states are persisted so service downtime wouldn't matter much as system can resume to its previous state without restarting from beginning and wasting resource. In short, Lagom is helpful when creating microservices, Temporal is helpful when creating system that orchestrate multiple microservices.