Kubernetes-based platform for deploying and managing serverless workloads. Like having serverless computing capabilities on your own Kubernetes infrastructure.
Developers use Knative to run serverless functions on their private Kubernetes clusters instead of public cloud.
Knative is an open-source Kubernetes add-on for serverless-style apps (autoscaling to zero, event-driven). The closest managed equivalent is Google Cloud Run, which is built on Knative. AWS Lambda and Azure Functions provide serverless functions but are not Knative-based Kubernetes platforms.