Submer Group

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Submer Group

Retrieved sources

^[1] Submer — https://submer.com/

founded_year: "2015"
funding: "Total funding USD 127,111,469 (Debt financing 2024-12-20: USD 20.9M; Series C 2024-10-03: USD 55.2M; Series B 2022-01-25: USD 33.9M; Series A 2020-09-23: USD 12.0M; Seed 2018-07-01: USD 1.8M)"
name: Submer
headquarters:
  address: Carrer Roma, 14, 08191 Rubí, Barcelona, Rubí, Barcelona  08191 , ES
  city: Rubí
  country: Spain
workforce:
  total: 188
financials:
  fundingTotal: 127111469
  fundingLatestRound:
    name: Debt financing
    date: 2024-12-20
    amount: 20862998

Submer is an IT services and IT consulting company operating across AI-infrastructure layers including power, cooling, data centers, and compute. It is part of Submer Group, which combines specialist companies to deploy and scale AI workloads using liquid-cooled infrastructure and modular data-center platforms. ^[1]

Value Proposition & Features

Submer Group positions itself as a full-stack AI-infrastructure provider addressing power availability, thermal density, deployment speed, and data sovereignty. Its platform approach combines liquid cooling, modular data centers, physical infrastructure development, and GPU services rather than selling cooling equipment alone. ^{[2] [3] [4]}

Core features include industrialized liquid-cooled infrastructure, modular data-center platforms based on NVIDIA reference designs, integrated power, cooling, networking, and IT systems, and GPU infrastructure-as-a-service for inference and cloud gaming. ^{[2] [3]}

• Liquid-cooled infrastructure for high-density AI workloads; the group reports more than 500 MW deployed. ^{[2] [4]}

• Modular data-center platforms factory-built and tested before on-site commissioning. ^[2]

• Integrated infrastructure combining IT, power, cooling, and networking as one system. ^[2]

• GPU-as-a-service through InferX, covering sovereign GPU and enterprise AI services. ^[3]

• AI and cloud services at the edge through Radian Arc’s InferX and RadianX product families. ^[3]

• Data-center development and operations through Rubix Data Centers. ^[4]

• Powered-land access, with the group reporting more than 8 GW across the Americas, EMEA, and APAC. ^{[2] [4]}

The architecture spans from site-level land and power through cooling, modular deployment, and compute or cloud services. This makes Submer relevant to High-Density Compute deployments where conventional air cooling and bespoke construction can constrain rack density or deployment schedules. ^{[2] [4]}

Screenshots

No three official screenshots were identified in the available search results.

Product Roadmap / Announcements

As of October 4, 2026,

• September 28, 2026: Submer Group launched Corenix, a modular data-center infrastructure company serving neoclouds, hyperscalers, and AI operators. ^[2]

• September 17, 2026: The group consolidated InferX into Radian Arc, making InferX and RadianX the two product families of the GPU-as-a-service business. ^[3]

• September 17, 2026: Submer Group announced a planned €1 billion AI data center in Flix, Spain, to be developed and operated by Rubix Data Centers. ^[4]

Recent Developments

During the past 90 days, Submer Group announced Corenix as a new modular data-center platform company and appointed Martin Renkis as its CEO. ^[2] It also consolidated InferX into Radian Arc and announced the €1 billion Flix AI data-center project, which is designed to use liquid cooling without operational water consumption. ^{[3] [4]}

History and Origin Story

Submer was founded in 2015 and is headquartered in Rubí, Barcelona, Spain. ^[1] The company has since expanded from liquid-cooling engineering into a group structure spanning AI infrastructure, modular data centers, physical data-center development, and GPU services; the group describes its operating companies as addressing the full infrastructure stack from land and power to cloud and edge. ^{[3] [4]}

Fundraising History

The funding figures and dates are reported in the retrieved company metadata. ^[1]

No reliable source found for a complete investor list.

Notable Team Members

Submer’s retrieved company metadata identifies the business as headquartered in Rubí, Spain, with a reported workforce of 188. ^[1] No reliable source found in the available results for a verified founder or leadership roster.

Martin Renkis was appointed CEO of Corenix when Submer Group launched the modular data-center company in September 2026. ^[2]

Market Sizing

Category, Market Size, and Category Growth

Submer Group operates across several overlapping categories: liquid cooling for high-density computing, modular AI data centers, data-center development and operations, and GPU infrastructure-as-a-service. ^{[2] [3] [4]}

No reliable analyst or financial-journalism market-size estimate was found in the available search results specifically for Submer Group’s addressable market.

Pricing

Revenue Trajectory Estimates

No reliable reported revenue or ARR figure was found in the available search results.

Competitive Landscape

Who it’s for, who it’s not for

Submer Group is aimed at neoclouds, hyperscalers, AI operators, telecom operators, and organizations requiring high-density AI infrastructure, modular deployment, sovereign GPU capacity, or large-scale data-center development. ^{[2] [3] [4]}

It is not a natural fit for small organizations seeking ordinary enterprise hosting, low-density workloads, or an off-the-shelf desktop or single-server cooling product; the available descriptions focus on industrial-scale infrastructure and custom-engineered deployments. ^{[2] [3] [4]}

Viable Alternatives

• LiquidStack: An alternative liquid-cooling provider for high-density data-center and AI workloads.

• Accelsius: An alternative advanced-cooling company focused on data-center thermal management.

• ZutaCore: An alternative data-center cooling provider using liquid-based thermal solutions.

• Traditional hyperscale cloud providers: Alternatives for customers that need rented compute rather than ownership or operation of custom AI infrastructure.

• Specialist modular data-center integrators: Alternatives for organizations prioritizing prefabricated deployment without adopting Submer Group’s broader stack.

The available search results do not provide sufficient entity-specific evidence to rank these alternatives or verify their current product overlap with every Submer Group business unit.

Competitor Table

Sources

Sources (retrieved)