SSubmer
Submer is a Barcelona-based company that designs and manufactures single-phase immersion cooling systems (SmartPod) and modular data center infrastructure for AI and high-performance computing workloads, reducing energy and water use versus traditional air cooling. Founded in 2015, it has grown into the Submer Group with subsidiaries spanning GPU/AI cloud services (Rubix, Inferx) and data center operations (Radian Arc), with offices in Barcelona, Houston and Taipei. It has raised a Series C round (~$55.5M, Oct 2024) at a reported ~$500M valuation.
SectorsData Center Infrastructure, Immersion/Liquid Cooling, Climate Tech, AI Infrastructure, Hardware
Start-up MapDeeptech & Hardware › Semiconductors, compute & AI infrastructure
Founders
D
Daniel Pope
CEO & Co-founder
P
Pol Valls Soler
Co-founder & CFO/CSO
Global models 5
ZZutaCore
United States · www.zutacore.com ↗
Direct competitor building waterless, two-phase liquid cooling systems for AI/HPC data centers, the same core immersion/liquid-cooling infrastructure market as Submer.
$200MComparable
AAccelsius
United States · accelsius.com ↗
Direct-to-chip two-phase liquid cooling company for gigawatt-scale AI data centers, competing in the same next-gen data center cooling category as Submer.
$89MComparable
IIceotope
United Kingdom · www.iceotope.com ↗
Precision immersion and liquid cooling provider for data centers and edge computing, a direct global comparable to Submer's cooling technology.
$81.4MComparable
LLiquidStack
United States · liquidstack.com ↗
Immersion cooling pioneer offering single- and two-phase liquid cooling for hyperscale and AI data centers, directly comparable to Submer's product line.
$45MComparable
GGreen Revolution Cooling (GRC)
United States · www.grcooling.com ↗
One of the original single-phase immersion cooling providers for data centers, the closest business-model match to Submer's founding product category.
$43MComparable
In the same niche 25 others
See all in the Start-ups Map →
Notes: Most funded first
Investors 8
Open as list →
MMundi Ventures
www.mundiventures.com
NNorrsken VC
www.norrsken.vc
BBanco Santander
www.santander.com
CCentro para el Desarrollo Tecnológico y la Innovación
cdti.es
MM&G Catalyst
P
Planet First Partners
A
Andreas Mihalovits
T
Tim Reynolds
Funding rounds 5
| Date | Round | Amount | Lead |
|---|---|---|---|
| 2024-12-20 | Venture Debt | €20M |
Banco Santander
+1 more
|
| 2024-10-02 | Series C | $55.5M |
M&G
+3 more
|
| 2022-01-19 | Series B (estimated) | €30M |
Planet First Partners
+2 more
|
| 2020-09-23 | Series A | $12M |
Norrsken VC
+3 more
|
| 2018-07 | Seed (estimated) | €3.9M | Mundi Ventures |
News 3
Open as list →| Published | Article |
|---|---|
| 2026-10-05 |
Dealflow #529: Didit grows revenue by 65x in 15 months. Barlon Capital new fund. Indra and Adsmurai goe shopping. ↗
Dealflow.es Newsletter
2026-10-05 |
| 2026-08-31 |
Dealflow #524: HappyRobot raised $150M. Marosa acquired for €112M. Bootstrapped zernio gets to $3M ARR in 13 months ↗
Dealflow.es Newsletter
2026-08-31 |
| 2026-08-28 |
Submer refuerza su presencia en India con una inversión de 1.700 millones ↗
El Economista
2026-08-28 |