Comment by sijieg

There seems to be a confusion here.

Pulsar has been widely adopted in many mission-critical business-facing systems like billing, payment, transaction processing, or used a unified platform that consolidate enterprises diverse streaming & messaging use cases. It has quite a lot of adoptions from F500 companies, hyperscalers, to startups.

Kafka is used for in data ingestion and streaming pipeline. Kafka protocol itself is great. However, the implementation has its own challenges.

Both Pulsar and Kafka are great open source projects and their protocols are designed for different use cases. We have seen many different companies use both technologies.

Ursa is the underlying streaming engine that we re-implemented to be leaderless and lakehouse-native so that we can better leverage the current cloud infrastructure and natively integrate with broader lakehouse ecosystem. It is the engine we used to support both in our product offerings.