Submer is a Barcelona-based infrastructure company, founded in 2015 by Daniel Pope and Pol Valls, that built its business on single-phase immersion cooling for dense servers. Since February 2025 it has also designed, built and operated liquid-cooled data centers and offered AI-as-a-service. The company says it passed 500 MW of liquid-cooled deployments in 2025.
Submer designs and manufactures immersion cooling systems in which servers sit in tanks of dielectric fluid instead of being cooled by air. In February 2025 it added two business units: data center design and construction, and data center operations with AI-as-a-service. Its first owned facility, a planned 56 MW data center in Barcelona, was announced as the first phase of further deployments in Europe.
Source: submer.com, datacenterdynamics.com
The core range is the SmartPod family of immersion tanks, first launched in 2018, including the hyperscale SmartPod EXO platform. Submer also sells modular data center systems and, through its newer units, offers data center development, operations and GPU or AI-as-a-service capacity.
Source: submer.com, submer.com
Submer targets data center operators, hyperscale and AI infrastructure buyers, and high-performance computing users. It is headquartered in Barcelona and, according to its October 2024 funding announcement, operates a manufacturing facility in Houston, Texas, with expansion focused on the U.S. and Asia-Pacific.
Source: submer.com
Submer is privately held. In October 2024 it announced a $55.5 million growth round led by M&G's Catalyst strategy, with Planet First Partners, Norrsken VC and Mundi Ventures. In January 2025 a EUR 20 million debt facility from Banco Santander brought the round to EUR 70 million, according to its legal advisers RCD.
Source: submer.com, rcd.legal
Submer reports more than 500 MW of liquid-cooled deployments as of 2025 and says its planned Barcelona facility is designed for zero water use in cooling. We found no Science Based Targets initiative entry for the company when checked on October 16, 2026.
Source: submer.com, sciencebasedtargets.org
Submer is one of the specialist immersion cooling vendors in this category. Buyers comparing it with direct-to-chip suppliers should note that it now also competes as a data center developer and operator, not only as an equipment maker.
| Field | Value | Source |
|---|---|---|
| Headquarters | Barcelona, Spain | COMPANY WEBSITE submer.com |
| Founded | 2015, by Daniel Pope and Pol Valls | COMPANY WEBSITE submer.com |
| Ownership | Private | COMPANY WEBSITE submer.com |
| Employees | No data | NO DATA |
| Revenue (published) | No data | NO DATA |
| Operations and regions | Deployed and operating worldwide | COMPANY WEBSITE submer.com |
| Customers and markets | Data center operators, hyperscale and AI infrastructure buyers | COMPANY WEBSITE submer.com |
| Facilities and capacity | 500+ MW of liquid-cooled deployments (2025) | COMPANY WEBSITE submer.com |
| Technologies | Single-phase immersion cooling; heat reuse; dry-cooled deployments | COMPANY WEBSITE submer.com |
| Certifications and standards | No data | NO DATA |
| Partners and named customers | No data | NO DATA |
Only what the company or an official register publishes. Targets and commitments are labelled as such. No data means we found no public figure, not that none exists.
| Field | Value | Source |
|---|---|---|
| PUE (published) | No data | NO DATA |
| WUE (published) | No data | NO DATA |
| Renewable energy share | No data | NO DATA |
| SBTi target status | Not found in SBTi export (checked 2026-10-16) | PUBLIC SOURCE sciencebasedtargets.org |
Submer is headquartered in Barcelona, Spain, and was founded there in 2015. (submer.com)
Submer makes single-phase immersion cooling systems, sold as the SmartPod range, including SmartPod EXO for hyperscale deployments. (submer.com)
Since February 2025 Submer has had a data center operations unit, and it announced a planned 56 MW facility in Barcelona as its first owned site. (datacenterdynamics.com)
Accessed Oct 24, 2026.
