L+OBLogic + Belief

For climate, SaaS and AI founders

I've audited it, sold it and built it.

Now I help leadership teams with all three.

Book a 30-minute call See the work
01 02 03

01 — Audited

Ten years in economics, policy, strategy and operations

Working across every industry, around the world, as a consultant and auditor.

02 — Sold

SaaS into public and private markets

Commercial and GTM roles in Series A–C scale-ups, working internationally.

03 — Built

Teams, products and revenues from zero

As an operating partner to a business that was failing, and launching my own. I know what it feels like.

Four ways to work together

Clear scope, clear outcome. Every engagement can start small.

Fractional commercial & ops

A senior operator a few days a month: sales motion, pricing, hiring your first commercial team, and the systems behind them.

£1,000 a day · ongoing

First customers sprint

Six weeks to sharpen who you sell to, what you say, and land the first design partners or paid pilots.

£10,000 · 6 weeks

Investor-ready numbers

Board reporting, unit economics and opex/capex visibility built properly, so your next round's diligence is uneventful.

Priced on valuation · 4 weeks

Claims that survive scrutiny

A review of your carbon methodology, impact claims and AI-generated data against GHG Protocol and ISSB — before a customer's auditor does it for you.

£999 · 2 weeks

Case studies

Four client engagements, from seed to Series C, and one venture of my own.

Consulting + SaaS Bringing a climate business back to life £400k → £1.2m Revenue, and loss-making to EBITDA-positive. Read the case study → My own venture Carbon markets are not broken 3 weeks From co-founding to a working beta. Read the case study → Natural capital · Seed From strong science to a growth plan £1.7m seed Customer, market and product strategy reset. Read the case study → AI frontier lab · Series C Teaching AI how the real economy works Build + evaluate Enterprise workflows across risk, strategy and operations. Read the case study → Pre-Series A platform Every pound accounted for Full P&L Capex, opex, unit economics and margins, reviewed end to end. Read the case study →

Half of this work is logic. The other half is believing a better economy is worth building.

Luke O'Brien · Founder, LOB

Building something early?

Tell me where you are. Thirty minutes, no pitch.

Book a 30-minute call