In our previous overview of the most popular messaging systems, we were talking about Apache Kafka vs. RabbitMQ. Now, let's take a look at the less powerful, but still very helpful, message brokers. We will consider the pros and cons of ActiveMQ and Redis Pub/Sub. Although these solutions aren't very suitable for processing big data, they provide a strong basis for creating small business analytics tools.
Apache ActiveMQ
Pricing: free