Book Now

How to build an AI start-up in the UK

Nnamdi Emelifeonwu explains how a problem faced by a visually impaired colleague became Definely, a legal tech scale-up with 150 customers and $40m raised

Nnamdi Emelifeonwu left a top London law firm to set up one of the UK’s fastest-growing legal tech companies. He talks to host, Sir Richard Harpin, about how building a tool to help his visually impaired colleague navigate complex legal documents led to co-founding Definely.

It is an AI-powered legal tech platform designed to help lawyers access definitions, clauses and key information instantly without leaving the Word document they’re working on. It is used by some of the world’s leading law firms and global businesses and is now integrated into Anthropic’s Claude.

Nnamdi shares the reality of becoming a founder, the challenges of raising investment, and how solving one deeply personal problem evolved into a multi-million-dollar AI business.

Themes include:

  • The future of AI in the legal industry
  • Building a start-up from scratch
  • Entrepreneurship, risk and resilience
  • Scaling a B2B company
  • Expanding into the US
  • Starting a business in the UK

More like this

"I actually don't want to grow": The 800% surge that nearly broke Nadine Merabi's brand

From answering the phones under a fake name to building a board a decade in, Nadine Merabi shares the lessons behind scaling her brand

Listen Here

Author

Dougal Shaw

Date

01 July 2026

Blue Light Card's growth story: From start-up to 6 million members

How a discount platform for frontline workers became a fast-scaling commercial success without abandoning its mission

Listen Here

Author

Dougal Shaw

Date

23 June 2026

Little Moons: The overnight success that took 10 years

Founder Vivien Wong reveals the difference between riding a wave of sudden demand and being swept away by it

Listen Here

Author

Dougal Shaw

Date

16 June 2026

The pivot that saved Vinted

In his first-ever podcast interview, CEO Adam Jay explains how a single counterintuitive decision turned a failing start-up into a €8bn powerhouse

Listen Here

Author

Dougal Shaw

Date

09 June 2026

How one founder is using AI to land a knockout business opportunity

What began as a boxing apparel brand is now becoming a lesson in how founders can use AI to unlock new growth

Read Article

Author

Dougal Shaw

Date

04 June 2026