Flapjack vs Kiali: What are the differences?
Flapjack: Monitoring notification routing + event processing system. Flapjack is a flexible monitoring notification routing system that handles: alert routing, alert summarisation, your standard operational tasks; Kiali: Service mesh observability and configuration. It is an observability console for Istio with service mesh configuration capabilities. It helps you to understand the structure of your service mesh by inferring the topology, and also provides the health of your mesh.
Flapjack and Kiali can be categorized as "Monitoring" tools.
Flapjack is an open source tool with 653 GitHub stars and 91 GitHub forks. Here's a link to Flapjack's open source repository on GitHub.