Eclipse Mosquitto

Eclipse Mosquitto is a highly efficient, lightweight message broker that implements the MQTT (Message Queuing Telemetry Transport) protocol versions 5.0, 3.1.1, and 3.1. Written in C, it is designed to operate with a minimal memory footprint, making it ideal for everything from low-power single-board computers (like Raspberry Pi or ESP32) to enterprise-grade cloud servers. In 2026, Mosquitto remains the architectural gold standard for Edge AI data ingestion, providing the reliable 'data bus' necessary for streaming high-frequency sensor telemetry into real-time inference models. As part of the Eclipse Foundation, its development is robust and community-driven, ensuring long-term stability and security. Its architecture supports a publish/subscribe model that decouples data producers from consumers, facilitating massive scalability in complex IoT ecosystems. Whether deployed as a standalone broker or in a bridged configuration for distributed networks, Mosquitto offers granular control over Quality of Service (QoS), message persistence, and security via TLS and advanced plugin architectures. Its position in 2026 is bolstered by its seamless integration with modern DevOps tools like Kubernetes and its role as the foundational messaging layer for the industrial metaverse.