Company · Deeptech & Hardware

Submer

submer.com ↗ ·Barcelona ·Series C

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.

Founded

2015

Founders

News

Rounds

Investors

SectorsData Center Infrastructure, Immersion/Liquid Cooling, Climate Tech, AI Infrastructure, Hardware Start-up MapDeeptech & Hardware › Semiconductors, compute & AI infrastructure

Profile updated 21 Jul 2026

Founders

Daniel Pope

CEO & Co-founder

Pol Valls Soler

Co-founder & CFO/CSO

Global models 5

ZutaCore

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

Accelsius

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

Iceotope

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

LiquidStack

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

Green 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

Investors 7

M&G

Investor United Kingdom

Mundi Ventures

www.mundiventures.com

Investor Spain

Norrsken Barcelona

www.norrsken.org/houses/barcelona

Planet First Partners

www.planetfirstpartners.com ↗

Investor United Kingdom

Funding rounds 2

Debt · €20M

Submer, which builds immersion liquid-cooling systems for data centres, added a €20 million growth debt line arranged with Banco Santander (…

2024-12-20

Series C · $55.5M

Barcelona-based Submer raised $55.5M led by M&G's Catalyst strategy at a reported $500M post-money valuation to scale its immersion-cooling …

2024-10-02

News & media 2

Published	Article
2026-08-31	Dealflow #524: HappyRobot raised $150M. Marosa acquired for €112M. Bootstrapped zernio gets to $3M ARR in 13 months ↗ Dealflow.es Newsletter
2026-08-28	Submer refuerza su presencia en India con una inversión de 1.700 millones ↗ El Economista