Top BMS companies and what each is known for
Six companies and one software framework appear on most BMS shortlists. Each is listed below with its flagship products, described in the company's own words and linked to the source. Milvian AI is not a controls maker: its Aqueduct software reads and controls their equipment over open protocols.
Who makes what
Products and descriptions from each company's own pages, linked in the sources.
| Company | Flagship BMS products | Known for, in the company's words |
|---|---|---|
| Siemens Smart Infrastructure | Desigo CC, Building X. | An open, multi-discipline integration platform; Building X is a vendor-agnostic cloud platform in the Siemens Xcelerator portfolio. |
| Johnson Controls | Metasys, OpenBlue. | Metasys is its flagship open building automation system; OpenBlue is an AI-powered smart building ecosystem. |
| Honeywell | EBI One, Honeywell Forge. | EBI brings building management, fire and life safety and security into one environment, built on 25+ years of EBI. |
| Schneider Electric | EcoStruxure Building Operation. | BMS software for large buildings with native BACnet, LonWorks and Modbus support. |
| Carrier (Automated Logic) | WebCTRL, WebCTRL Cloud. | A web-based platform with native BACnet controllers and built-in fault detection. |
| Acuity (Distech Controls) | ECLYPSE controllers, Atrius Facilities, EC-Net Facilities. | Atrius Facilities is a cloud BMS; EC-Net Facilities runs on the Niagara framework. |
| Tridium (Honeywell) | Niagara Framework. | A software platform for connected products, built on open-protocol standards, launched in 1999 and sold through an open distribution model. |
| Milvian AI | Aqueduct. | Facility intelligence software for water, energy and air, with control over open protocols; partners install the hardware. |
Scale, as the companies report it
Niagara instances at work in hundreds of thousands of projects.
Source: TridiumIP devices per server in Metasys 15.0, with 50,000 objects.
Source: Johnson ControlsPoints EBI One is designed to support in one operational experience.
Source: HoneywellField and service technicians in the Johnson Controls network.
Source: Johnson ControlsQuestions for any BMS company
Programming rights
Who holds the tools and licenses to change the controllers?
Exit terms
What does moving service to another integrator cost, in writing?
Data export
Can every trend be exported in a standard format?
Proof of savings
Against what baseline is a saving reported?
Where Aqueduct fits
The companies above make controllers and the software that programs them. Aqueduct sits at a different layer: it meters water, energy and indoor air, models each system as a live digital twin and baselines it against weather, across every site an owner runs.
It reads equipment from any of these makers over BACnet or Modbus and controls it where control is enabled, with owner approval. That lets an owner keep the controllers that work, replace a front end that has reached end of support, or specify Aqueduct into a new building.
Compare in more depth
Sources11 references cited on this page
- Siemens, Desigo CC building management platform.
- Siemens, Building X.
- Johnson Controls, Metasys 15.0 release, 18 November 2025.
- Johnson Controls, OpenBlue.
- Honeywell, EBI One powered by Forge Cognition.
- Schneider Electric, building management system launch page.
- Schneider Electric, product range 62111.
- Automated Logic, WebCTRL building automation system.
- Acuity Brands, Distech Controls Facilities BMS software suite, 22 October 2024.
- Tridium, Niagara Framework.
- Tridium, About Tridium.
Related
Common questions
Siemens, Johnson Controls, Honeywell, Schneider Electric, Carrier through Automated Logic and Acuity through Distech Controls are the most widely known. Tridium, a Honeywell business, supplies the Niagara Framework that many other makers and integrators build on.
Not on its own. Tridium describes Niagara as a software platform for developing and deploying connected products, and other companies build BMS products on it, such as Distech Controls with EC-Net Facilities. An integrator programs a Niagara station for each building.
Milvian AI makes Aqueduct, software that can act as a BMS, but it is not a controls hardware maker. Aqueduct controls equipment through LoRaWAN relays or BACnet and Modbus field controllers, and partners install the devices. See Aqueduct BMS.
Yes, when the devices speak open protocols. Schneider Electric, for example, names BACnet, LonWorks and Modbus support for EcoStruxure Building Operation. Aqueduct reads BACnet and Modbus devices from any maker, so mixed sites and portfolios report on the same baseline.
See Aqueduct on your own facility.
Bring a site, a utility bill or a question. We will show you where the loss is.