Reservoir-Hosted Computing

Data centres
belong underwater

AI infrastructure needs to scale faster and more sustainably. Blue Umi submerges sealed compute pods in existing reservoirs - radically reducing cooling energy overhead, land use, and time to deployment.

View live prototype ↓

Live Prototype

Evesham prototype pod

We have designed, fabricated, and deployed a full-scale prototype compute pod at Evesham Marina, Worcestershire. The pod is a sealed steel vessel submerged at 2.5m depth, filled with dry nitrogen, and connected via a dedicated 1 Gbps symmetric fibre link. It is currently running production AI workloads on A100 GPUs - available to rent via Vast.ai.

Server rack mounted on pod base plate
Server rack mounted on pod base plate
Prototype lowered into position at Evesham Marina
Prototype lowered into position at Evesham Marina
Live
Updated just now

Power consumption

1,180W

24-hour trend · total pod power draw

Internal pod temperature

18.3°C

24-hour trend · rack intake sensor

External water temperature

12.6°C

24-hour trend · external sensor at pod depth

Cooling overhead

0W

No fans, chillers, or pumps. Heat dissipates passively through the vessel wall to the surrounding water.

Pod atmosphere

95.2% N₂

The pod interior is purged with dry nitrogen. This inert atmosphere eliminates oxidation and moisture-related hardware failures.

GPU Compute

Available

2× A100 available to rent via Vast.ai →

Host with us

There is available rack space in the prototype pod. If you'd like to experience underwater hosting firsthand you can colocate your own server(s) in our live deployment.

6U / 4kW remaining in the prototype pod
  • Dedicated symmetrical gigabit fibre
  • UPS-backed power
  • Zero cooling overhead
  • We'll beat your existing colo rate by 50%
Get in touch →

The Vision

Reservoir-hosted computing at scale

The Evesham prototype is the first step. The goal is modular, multi-pod deployments in managed reservoirs - connected to the grid and existing fibre infrastructure, with cooling handled entirely by the surrounding water.

Multi-pod reservoir deployment - concept illustration

Concept illustration - multi-pod reservoir deployment

Modular and scalable

Each pod is an independent, self-contained unit. Arrays of pods can be deployed incrementally to match demand.

Zero cooling infrastructure

Heat dissipates passively to the surrounding water. No chillers, no cooling towers, no water consumption.

Deployed in existing sites

Reservoirs are engineered assets with established perimeter security, grid connections, and proximity to population centres.

Team

Meet the founders

Sam Tiller

Sam Tiller

Founder & CEO

Engineer and founder with a background in advanced manufacturing, subsea systems and complex technology delivery. Previously Delivery Lead at DEEP, before founding Blue Umi and building its first underwater data centre prototype.

LinkedIn →
Seb Samways

Seb Samways

Co-founder & Engineering Lead

Naval architect specialising in marine structures, subsea systems and floating infrastructure. Leads Blue Umi's pod and pontoon design, including the hydrodynamic and structural analysis required to scale from prototype to full-depth reservoir deployments.

LinkedIn →

Contact

Get in touch

Interested?

Whether you're a potential customer exploring edge compute, an investor interested in deep tech, a water company looking at innovation opportunities, or a researcher who wants to host hardware in our prototype - we'd like to hear from you.

contact@blue-umi.com

Blue Umi Ltd · Bristol, UK · Patent pending
Company No. 16016629