Top MQTT-CLIENT GitHub Repositories & Tools (2026)

HiveMQ MQTT Client is an MQTT 5.0 and MQTT 3.1.1 compatible and feature-rich high-performance Java client library with different API flavours and backpressure support

MQTT CLI is a useful command line interface for connecting various MQTT clients supporting MQTT 5.0 and 3.1.1

A Swift NIO MQTT v3.1.1 and v5.0 Client

Pure asyncio MQTT 3.1.1 and 5.0 for Python 3.10+, with deterministic subscription routing, bounded queues, and correlation-safe request/response.