We are pleased to announce the availability of Apache BifroMQ 4.0.0-incubating, the project's first release in the Apache Incubator.

This release marks an important milestone: it represents the transition of BifroMQ's pre-Apache development history and production experience into an Apache-governed project, with community-driven development, transparent processes, and formal release procedures.

This blog post provides a high-level overview of the release. For full details, please refer to the official release notes and latest online documents.

When teams move from a few thousand devices to millions of always-on connections, MQTT usually becomes a key piece of infrastructure. It offers a simple publish/subscribe model, works well on constrained networks, and has wide client support.

But at cloud scale, the broker itself turns into frontline infrastructure: it is the entry point for business traffic, it must handle massive numbers of long-lived connections, and it has to remain reliable under bursty and unpredictable workloads.

Apache BifroMQ (Incubating) was built in this environment. In this post, we give a high-level overview of what BifroMQ is, why another MQTT broker is needed, and how its architecture is shaped by real large-scale IoT deployments.