The Lydian Stone principle
A Lydian stone was one of the earliest tools used to test the value of precious metals – a simple, physical method for separating real worth from surface appearance.
Lydian Stone applies the same principle to AI. Rather than focusing on novelty or tool adoption, the work is grounded in measurement: identifying where AI creates genuine capacity, improves the quality and speed of decisions, and produces defensible performance impact.
The emphasis is always on substance over appearance, and long-term advantage over short-term automation.
Who we partner with
Why firms choose Lydian Stone
Experience spans global investment, advisory, and enterprise environments, supporting senior teams operating in complex, high-stakes decision contexts.
Deep investment-workflow experience
Built around how investment, strategy, and finance teams actually operate day to day.
Rigorous, numbers-first impact modelling
Capacity, decision speed, and value uplift are modelled explicitly - not assumed.
Practical AI “kits” built on existing tools
Structured prompts, templates, and workflows designed for immediate use.
Hands-on, founder-led delivery
Direct involvement throughout strategy, build, testing, and adoption.
Flexible, retainer-based partnership model
Designed to scale with the organisation and adapt as priorities evolve.