RSMQ vs VerneMQ: What are the differences?

Developers describe RSMQ as "A lightweight message queue for Node.js that requires no dedicated queue server. Just a Redis server". tl;dr: If you run a Redis server and currently use Amazon SQS or a similar message queue you might as well use this fast little replacement. Using a shared Redis server multiple Node.js processes can send / receive messages. On the other hand, VerneMQ is detailed as "VerneMQ is a distributed IoT/MQTT message broker". VerneMQ is a distributed MQTT message broker, implemented in Erlang/OTP It's open source, and Apache 2 licensed. VerneMQ implements the MQTT 3.1, 3.1.1 and 5.0 specifications..

RSMQ and VerneMQ can be primarily classified as "Message Queue" tools.

Some of the features offered by RSMQ are:

• Lightweight: Just Redis and ~500 lines of javascript.
• Guaranteed delivery of a message to exactly one recipient within a messages visibility timeout.
• Received messages that are not deleted will reappear after the visibility timeout.

On the other hand, VerneMQ provides the following key features:

• Open Source, Apache 2 licensed
• QoS 0, QoS 1, QoS 2
• MQTT v5.0 fully implemented

RSMQ and VerneMQ are both open source tools. It seems that VerneMQ with 1.76K GitHub stars and 189 forks on GitHub has more adoption than RSMQ with 1.07K GitHub stars and 78 GitHub forks.