Sandbox
Fast, evidence-backed feasibility
We previously built Sensat, an AI infrastructure SaaS company, from zero to eight-figure revenue deployed across $250bn worth of critical projects worldwideOlympics, Heathrow, HS2, Severn Trent, etc.

Now we are solving the single greatest bottleneck holding back trillions in global infrastructure investment – feasibility.

ProblemA $350bn
feasibility gap

Every year, ~10,000 infrastructure projects enter early-stage feasibility in the UK aloneOur beachhead market..

Teams spend between $25k–$250k$3.5tn global CAPEX / year, approximately 10% is spent on early stage feasibility investigating each site, yet 50-70% of these projects die here, wasting hundreds of millions in abortive capital.

Today:

The process is manual, sequential, and depends on fragmented consultant reports

Decisions rely on static opinions rather than a concurrent, evidence-based system

There is no canonical object that represents "what we know about this site"

Despite billions spent, the system never gets smarter. Each site resets the process, knowledge is discarded, and feasibility is treated as a one-off opinion rather than an accumulating state.
Infrastructure feasibility

Sandbox allows feasibility knowledge to compound over time

SolutionAI-native reasoning

Sandbox encodes how experienced infrastructure teams actually reason about feasibility and runs that instantly and consistently across sites.

We replace months of fragmented analysis and opinion with a clear, evidence-backed view that teams can trust, share, and defend.

This kills bad sites early, focusing capital and talent only on the projects that will actually work.
In doing so we:

Standardise feasibility into a canonical 'SAFESite Assessment and Feasibility Evaluation' object (converting one-off exercise → accumulating asset)

Apply deterministic AI to reason across explicit rule-systems (planning policy, engineering heuristics)

Collapse sequential workflows into parallel ones to systematically kill bad sites early

Deterministic AI matters because feasibility decisions must be explainable, auditable, and defensible to planners, boards, and regulators (not probabilistic suggestions).

Right to winWe've lived this problem

Sandbox is the product that surfaced consistently across our work with infrastructure owners and operators.

We've met and interviewed 200+ owners and seen first-hand where today's infrastructure feasibility fails in production.
Sandbox applies our playbook for building a $100m+ company in this exact market to feasibility-grade AI, with direct access to early customers and design partners.
Sandbox feasibility record

Sandbox creates the canonical feasibility record that accumulates value through time

MilestonesPlan

30 days

Prove automated SAFESite Assessment and Feasibility Evaluation

Prove that an automated SAFESite Assessment and Feasibility Evaluation can replace first-pass consultant feasibility for a defined sector.

60 days

Change real decisions

Demonstrate that SAFESite Assessment and Feasibility Evaluation outputs materially change feasibility decisions and prevent external spend.

90 days

Default feasibility artefact

Establish SAFESite Assessment and Feasibility Evaluation as the default, repeatable feasibility artefact teams rely on across sites.

Ask$1.2m pre-seed

We're assembling a small pre-seed with operators who understand how early infrastructure decisions compound.

This round establishes SAFESite Assessment and Feasibility Evaluation through design-partner adoption as a repeatable feasibility system of record.
Feasibility is the first decision every infrastructure project makes, and today it's the least structured.

Sandbox exists to turn that decision into the default feasibility layer projects are organised around.
TypeSAFE/ASA
Discount15%
Cap$10m