2025 was a breakout year for OptigoVN — not just in growth, but in the clarity of what “real-world building networks” actually look like at scale. By mid-November, OptigoVN had processed 159.65 billion packets and 22.48 TB of traffic. That data came from a broad footprint: 2,008 OT networks across 1,333 organizations, with 711 new networks added in 2025.

The result is a strong, defensible baseline for understanding how modern building networks behave — and for tracking what changes year over year.

The big takeaway, though likely not a shocker, is that most environments are still living in a hybrid era. Newer IP-based systems are growing, but legacy approaches and mixed architectures remain a major part of day-to-day reality. The traffic patterns reflect that: networks still lean heavily on polling to collect data (about 60% of observed packets), while event-driven updates like Change of Value (COV) notifications remain a small share (around 5%). Discovery traffic is also a meaningful slice (about 21%), which often indicates devices are regularly “searching” or re-establishing context instead of operating in a steady, quiet state. In plain terms: the industry is modernizing, but many networks are still carrying the operational habits — and overhead — of older designs.

It’s also important to be transparent about what this report is and isn’t. This is a snapshot of the OptigoVN ecosystem, not a complete census of every BACnet network in the world. But that’s exactly what makes it useful: it’s based on real traffic, from real networks, measured consistently.

With 2025 set as the baseline, the story going forward gets sharper: which architectures are gaining share, where performance is improving, and what practical changes (like shifting from heavy polling to more event-driven strategies) can reduce network load and improve responsiveness as portfolios grow.