KAAS is a Kafka-API-compatible, Kubernetes-native broker written in Rust. It deletes the hardest parts of Kafka and lets Kubernetes do that job instead: no ZooKeeper, no KRaft quorum, no bespoke replication protocol. Leader election? A Kubernetes Lease. Cluster state? A config file on shared NFS. Topics and users? Plain Kubernetes CRDs.
Yet on the wire, it is Kafka: your existing clients, Streams apps and shell tools connect unmodified — idempotent producers, transactions, SCRAM auth, ACLs. One small broker binary, one operator, zero JVM — made with love.
Install KAAS, start a broker, and stream your first topic in minutes.
Read the guide →Concepts, configuration and the full reference — built with mdBook.
Open the book →Source, issues and releases. Contributions welcome.
View the repo →KAAS is open source under the Apache License 2.0 — free to use, modify and ship.