Metasys alternatives, and how to keep the parts that work
Johnson Controls calls Metasys its flagship open building automation system, and release 15.0, announced in November 2025, supports protocols such as BACnet, MSTP and M-Bus. Owners reviewing Metasys alternatives are usually weighing metered results, water coverage and access to programming. Aqueduct can sit across a Metasys site or replace selected functions.
Metasys and OpenBlue, as Johnson Controls describes them
The Metasys 15.0 announcement lists HVAC, fire and security among the technologies Metasys brings together, and adds an energy management suite with ready-to-use applications for emissions tracking, benchmarking and budgeting. Johnson Controls quotes 50,000 objects and 1,000 IP devices per server, with multi-server redundancy and simultaneous backup.
OpenBlue is the wider family. Johnson Controls calls it a cyber-secured, AI-powered smart building ecosystem and groups its applications into workplace planning, energy efficiency and sustainability, equipment performance, and workplace experience.
Common reasons Metasys sites review their options
Programming access
Can facilities staff or a third-party integrator edit logic, or does each change need the original contractor?
Water beside energy
Does the shortlist show domestic water, cooling tower makeup and leaks next to electricity and comfort?
Baseline behind a claim
When a project reports a saving, which baseline is it measured against, and is that baseline adjusted for weather?
Scope of the service agreement
Which changes does the agreement cover, and which arrive as separate projects with their own approval?
Five Metasys alternatives, plus Aqueduct
Summaries follow what each vendor publishes about its own product, with links in the sources. A capability missing from a vendor page is left unstated here.
| System | How its vendor describes it | Often shortlisted when | What to ask |
|---|---|---|---|
| Johnson Controls OpenBlue | A cyber-secured, AI-powered smart building ecosystem, with applications such as OpenBlue Net Zero, central utility plant optimization and equipment performance. | You want to stay with Johnson Controls and add portfolio applications. | Which OpenBlue applications need Metasys underneath, and which run without it. |
| Siemens Desigo CC | Siemens calls it an open, multi-discipline integration platform, and its Powermanager module gathers consumption data with calculated and virtual meters. | A complex building wants HVAC, lighting, fire safety and security on a shared station. | How Metasys field devices are mapped, and who maintains the new graphics. |
| Honeywell Enterprise Buildings Integrator | Enabled by the Honeywell Forge platform, EBI covers building and energy management, health and safety, access control and video, with BACnet and OPC among listed standards. | Security and building operations share a single control room. | Which Honeywell Energy Manager or Forge services the plan assumes. |
| Tridium Niagara Framework | Built on open-protocol standards, Niagara is described by Tridium as a platform for developing and deploying connected products across buildings, data centers and more. | A mixed estate needs one integration layer above several controller brands. | Who holds the station licenses and the engineering files after go-live. |
| Automated Logic WebCTRL | Automated Logic offers WebCTRL as web-based software with fault detection and diagnostics, an EnergyReports tool, and owner or ALC cloud hosting. | Owners want a hosted front end with energy reports built in. | How Metasys controllers are handled during the cutover. |
| Aqueduct | Facility intelligence on aQ Core: sites, floors, zones and devices in one model, live water and electrical twins, weather-normalized baselines and logged control commands. | You want measured results across Metasys, or to retire it one function at a time. | Hardware is not the core business: Milvian AI installs through partners and confirms control scope site by site. |
Keep Metasys, replace it, or specify Aqueduct
Keep Metasys
Aqueduct takes a BACnet feed from the Metasys network and adds the meters and zone sensors the site is missing, so alarms and sequences stay where the team knows them.
Learn moreReplace selected functions
Schedules, occupancy automations and equipment groups move to Aqueduct one building at a time, starting where Metasys hardware has reached the end of support.
Learn moreSpecify it at design stage
For new construction, MEP engineers write the metering plan and BACnet or Modbus access into the drawings before tender.
Learn moreA Metasys transition in four stages
Inventory the network
List Metasys servers, field controllers, trunks and the points each one serves.
Baseline from bills
Upload past utility bills so Aqueduct has a weather-normalized reference before anything changes.
Shadow, then act
Aqueduct watches each air handler and chiller first; where control is enabled, with owner approval, it takes over schedules for that system.
Verify by meter
Each moved system is checked against its baseline, and command history shows whether every instruction executed.
Aqueduct in regulated and large estates
hospitals and clinics in one of India's top hospital chains run on Aqueduct.
of commercial real estate for one developer, monitored in Aqueduct.
median savings from fault detection and diagnostics in the DOE Smart Energy Analytics Campaign, against 4% for energy information systems.
Source: US DOESources7 references cited on this page
Related
Common questions
Yes. Aqueduct reads Metasys points over BACnet, which Johnson Controls lists among the protocols Metasys supports, through a field device network controller. Metasys keeps running sequences while Aqueduct adds metering, digital twins and fault diagnosis. The keep your BMS page shows the split of work.
No. Johnson Controls presents OpenBlue as an ecosystem of applications and positions Metasys within it, so the two usually work together. A buyer comparing alternatives should ask which OpenBlue applications assume a Metasys network and which connect to other systems.
Yes. Aqueduct can begin with a water balance from the main meter and sub-meters, find unaccounted flow and alert on leaks, without touching Metasys sequences. Energy and comfort follow on the same site model, using the BACnet points already on the network.
Aqueduct regresses usage on cooling and heating degree days to build a baseline, then compares each month against it in kilowatt hours and money. The weather-normalized baseline can be fitted from uploaded bills on day one, before any control moves.
See Aqueduct on your own facility.
Bring a site, a utility bill or a question. We will show you where the loss is.