MqttWk review
A self-hosted MQTT 3.1.1 broker with Redis clustering and optional Kafka forwarding.
Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026
MqttWk is an open-source Java MQTT broker for teams that want to run a broker themselves rather than use a hosted service. Its project describes an MQTT 3.1.1 implementation with QoS service levels, retained and will messages, and topic filtering with wildcard subscriptions. Small and mid-market teams comfortable managing a self-hosted service are its clearest fit; it is a less natural choice for organizations seeking a managed broker or MQTT 5 support.
The project’s integration story centers on Redis and Kafka. Redis is used for message caching and clustering, while Kafka forwarding is optional, letting a deployment connect MQTT message handling with a Kafka-based workflow. WebSocket connectivity is also supported. These capabilities give MqttWk a useful combination for teams whose architecture already includes Redis or Kafka, but they also make the product more relevant to technically managed environments than to buyers seeking a simple hosted endpoint.
Deployment instructions describe building and running the broker from a JAR, with YAML configuration. The project also lists message delivery retry and heartbeat mechanisms, optional client authentication and SSL connections, and username/password authentication with RSA-encrypted passwords; authentication methods are described as extensible. Support is community-based. Choose MqttWk if self-hosting, MQTT 3.1.1, and Redis-backed clustering or Kafka forwarding match your requirements. Look at an MQTT 5 alternative or a hosted broker if newer protocol support or vendor-managed operations are central to your decision.
MqttWk pros and cons
- Where it wins
- Supports QoS, retained messages, and will messages.
- Redis provides clustering and message caching.
- Optional Kafka forwarding and WebSocket connectivity.
- Where it doesn't
- Implements MQTT 3.1.1 rather than MQTT 5.
- Requires self-hosted deployment and Java-based setup.
- Support is community-based.
MqttWk fact sheet, pricing and score →
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