[tiew9Vii]

This is one of the differences between Kafka (Confluent) and Pulsar.

Confluent make big bold claims "Exactly once delivery" and have aggressive marketing.

Pulsar on the other hand would say we have "effectivley-once". Reading Pulsar docs vs Kafka, Pulsar are very modest about functionality and have no commercial marketing at all.

These days I have noticed Confluent in blog posts do use effectively once but marketing is as aggressive as ever.

Credit where credit is due. Confluent, the marketing and big bold claims is why almost everyone is using Kafka and not Pulsar and may not of even heard of Pulsar. I do find Pulsar architecture more interesting, since Splunk has brought them though it's remained in the background like it always has with no huge push to sell it.