Johnson Controls vs Siemens
Johnson Controls and Siemens are both placed on 4 of the same AI data center parts in this catalog, spanning layer 6. Johnson Controls appears on 10 parts in total and Siemens on 15.
At a glance
| Johnson Controls | Siemens | |
|---|---|---|
| Ownership | public | public |
| Headquarters | Cork, Ireland | Munich, Germany |
| Primary listing | JCI | SIE.DE |
| Market cap | 87.2B USD | 196.3B EUR |
| Parts placed | 10 | 15 |
| Layers covered | 3 | 3 |
| Units / subsidiaries | 0 | 2 |
| Seen in machines | 1 | 0 |
Market caps are a nightly snapshot in each listing's own currency, never converted.
What the shared parts are
- Valves and actuators — Valves and actuators that modulate and isolate flow within the facility water loop, including zone-isolation valves that take a section offline without stopping the whole loop.
- Building management, controls, environmental sensors — The building management system, PLCs, and environmental sensors that monitor and automatically control chillers, air handlers, pumps, and dampers across the facility.
- Detection — Smoke and heat detection, including aspirating detectors that continuously sample air to catch a fault before visible smoke develops.
- Suppression — Discharge hardware — piping, nozzles, and release systems — that delivers a clean or inert-gas extinguishing agent into the data hall or electrical room without damaging electronics.
The 4 parts both make
| Part | Johnson Controls | Siemens |
|---|---|---|
| Valves and actuators Layer 6 — Facility cooling & HVAC | manufacturer inferred | manufacturer disclosed |
| Building management, controls, environmental sensors Layer 6 — Facility cooling & HVAC | manufacturer disclosed | manufacturer disclosed |
| Detection Layer 6 — Facility cooling & HVAC | manufacturer disclosed | manufacturer disclosed |
| Suppression Layer 6 — Facility cooling & HVAC | manufacturer disclosed | manufacturer disclosed |
Only Johnson Controls
- Coolant distribution units layer 5
- Chillers & compressors layer 6
- CRAH / CRAC / fan walls / in-row units layer 6
- Air handling, economizers, filtration layer 6
- Physical security & access layer 9
- Load banks layer 9
Only Siemens
- MV switchgear, E-houses, power skids layer 7
- MV/LV transformers layer 7
- LV switchgear, switchboards, panelboards layer 7
- Busway / busbar trunking layer 7
- Circuit protection, fuses, surge, grounding layer 7
- Metering, power quality, monitoring layer 7
- 800 V DC architecture & solid-state transformers layer 7
- DCIM, digital twins, capacity planning layer 11
- Fans and motors layer 6
- PLCs layer 6
- and 1 more on Siemens's page.
Questions
- Do Johnson Controls and Siemens compete?
- In this catalog they are both placed on 4 of the same parts, across 1 layer: Valves and actuators, Building management, controls, environmental sensors, Detection, Suppression. Sharing a part does not mean selling the same product to the same buyer, so read each row's product note.
- Which has more placements, Johnson Controls or Siemens?
- Johnson Controls has 10 placements and Siemens has 15. Placement counts reflect how thoroughly each company has been catalogued as well as its real breadth, so they are not a ranking.
Generated from the catalog's part-to-company table. Each placement is tagged disclosed, reported or inferred; see sources & method. Neither company is endorsed or ranked here.