Apache Pulsar vs StreamNative

Apache Pulsar is a free, open-source distributed messaging and streaming platform built for cloud use. It supports message consumption with less than 10 ms latency and up to one million unique topics in a cluster. Configurable replication across geographic regions and automatic client failover to healthy clusters support multi-region deployments. Tenants and policies control access to data and actions, and can isolate brokers to limit noisy-neighbor effects. Maintained client libraries are available for Java, Go, Python, C++, Node.js, and C#. Built-in connectors move data to and from systems including Kafka, RabbitMQ, MySQL, PostgreSQL, MongoDB, Cassandra, and Elasticsearch. Pulsar Functions process messages with user-defined logic in Java, Python, or Go. Tiered storage can offload data from BookKeeper to blob storage such as S3 for unlimited retention. It can run in Docker or Kubernetes, with a Helm chart for Kubernetes. Encryption, authentication, and authorization are available but are not enabled by default. The 5.0.0-M2 milestone is for early testing and feedback, not production use.

StreamNative is a cloud data platform for capturing, transporting, transforming, governing, and serving business data in real time for applications, analytics, and agents. It provides native Kafka and Pulsar services powered by the Ursa engine, stream processing, schema registry support, and both listed delivery guarantees. Streams can be written directly to Iceberg and Delta tables in object storage. Universal Connect runs Kafka Connect and Pulsar IO connectors, including change-data-capture connectors, on one runtime. The platform supplies agents with governed context through open interfaces such as the StreamNative MCP Server. Deployment choices are Serverless, Dedicated, and BYOC in your cloud account, with AWS, Google Cloud, and Azure options. Serverless supports up to 100 MBps per namespace. Plans start at $73 a month for Serverless, $505 a month for Dedicated, and $365 a month for BYOC. Support is included in all plans, with 24/7 technical support available.