Redpanda [1] is fantastic if you want a solid Kafka clone. It's written in C++, with no external dependencies; it has Raft consensus built in. The API is Kafka-compatible.
There are some missing features compared to Kafka (no dynamic rebalancing of partitions being the top one), but they're also rolling out some new features that Kafka does not have, such as transformation pipelines [2].
NATS's brand new JetStream [3] feature is also looking very promising. It uses Raft internally. NATS itself is rock solid, and JetStream builds on that foundation.
NATS also has very interesting support replication topologies, meaning you can build graphs of streams that each feed in other streams, so you can do the publishing and consumption in different locations, with different availability constraints.
[1] https://vectorized.io/redpanda
[2] https://vectorized.io/blog/wasm-architecture/
[3] https://docs.nats.io/jetstream/jetstream
There are some missing features compared to Kafka (no dynamic rebalancing of partitions being the top one), but they're also rolling out some new features that Kafka does not have, such as transformation pipelines [2].
NATS's brand new JetStream [3] feature is also looking very promising. It uses Raft internally. NATS itself is rock solid, and JetStream builds on that foundation.
NATS also has very interesting support replication topologies, meaning you can build graphs of streams that each feed in other streams, so you can do the publishing and consumption in different locations, with different availability constraints.
[1] https://vectorized.io/redpanda
[2] https://vectorized.io/blog/wasm-architecture/
[3] https://docs.nats.io/jetstream/jetstream