RSMQ vs ejabberd: What are the differences?

### Key differences between RSMQ and ejabberd

1. **Messaging Protocol**:
    RSMQ is based on Redis and uses a simple protocol over TCP sockets for messaging, whereas ejabberd is an XMPP-based server that supports a wide range of XMPP extensions and protocols for communication.

2. **Scalability**:
    RSMQ is designed for high availability and scalability by utilizing Redis as a backend, allowing for easy horizontal scaling, while ejabberd is known for its vertical scalability due to its Erlang/OTP architecture.

3. **Use Cases**:
    RSMQ is more suited for lightweight and simple messaging scenarios where Redis is already being used, while ejabberd is commonly used in real-time messaging applications, chat platforms, and IoT environments that require complex functionalities.

4. **Ease of Deployment**:
    RSMQ is easy to set up and deploy as it only requires a running Redis instance, making it convenient for small projects, whereas ejabberd may have a steeper learning curve and more infrastructure requirements due to its feature-rich nature.

5. **Community Support**:
    RSMQ has a smaller community compared to ejabberd, which has a large and active user base contributing to its continuous development, support, and availability of plugins and extensions.

6. **Persistent Storage**:
    RSMQ messages are stored in Redis, which can be both an advantage (for performance) and a limitation (for long-term storage), while ejabberd offers built-in support for persistent message storage, ensuring message durability and reliability.

In Summary, RSMQ and ejabberd differ in messaging protocol, scalability, use cases, ease of deployment, community support, and persistent storage capabilities.