Streaming Platforms Comparision

Feature	AutoMQ	Apache Kafka	Confluent	Apache Pulsar	Redpanda	Warpstream
Apache Kafka Compatibility[1]	Native Kafka	Native Kafka	Native Kafka	Non-Kafka	Kafka Protocol	Kafka Protocol
Source Code Availability	Yes	Yes	No	Yes	Yes	No
Stateless Broker	Yes	No	No	Yes	No	Yes
P99 Latency	Single-digit ms latency					> 400ms
Continuous Self-Balancing	Yes	No	Yes	Yes	Yes	Yes
Scale in/out	In seconds	In hours/days	In hours	In hours (scale-in); In seconds (scale-out)	In hours/In seconds (Enterprise Only)	In seconds
Spot Instance Support	Yes	No	No	No	No	Yes
Partition Reassignment	In seconds	In hours/days	In hours	In seconds	In hours/In seconds (Enterprise Only)	In seconds
Component	Broker	Broker Zookeeper (Non-KRaft)		Broker Zookeeper Bookkeeper Proxy(Optional)	Broker	Agent MetadataServer
Durability	Guaranteed by S3/EBS[2]	Guaranteed by ISR		Guaranteed by Bookkeeper	Guaranteed by Raft	Guaranteed by S3
Inter-AZ Networking Fees	No	Yes				No

[1] Apache Kafka Compatibility's definition is coming from this blog.

[2] EBS Durability: On Azure, GCP, and Alibaba Cloud, Regional EBS replicas span multiple AZs. On AWS, ensure durability by double writing to EBS and S3 Express One Zone in different AZs.