Redis Kafka
Push-based message delivery is supported by Redis. This means that messages published to Redis will be distributed to consumers automatically. Pull-based message delivery is supported by Kafka. The messages published to the Kafka broker are not automatically sent to the consumers; instead, consumers must pull the messages when they are ready.
Message retention is not supported by Redis. The communications are destroyed once they have been delivered to the recipients. In its log, Kafka allows for message preservation.
Parallel processing is not supported by Redis. Multiple consumers in a consumer group can consume partitions of the topic concurrently because of the Kafka's partitioning feature.
Redis can not manage vast amounts of data because it's an in-memory database. Kafka can handle massive amounts of data since it uses disc space as its primary storage.
Because Redis is an in-memory store, it is much faster than Kafka. Because Kafka stores data on disc, it is slower than Redis.