Gain Theory, A Global Foresight Consultancy

We accelerate growth for ambitious brands

We are a global marketing effectiveness and foresight consultancy. By fusing deep expertise with advanced AI, we empower marketers to make smarter and faster data-informed investments that deliver unmatched value.

Gain Theory named a Leader in The Forrester Wave™:

Marketing Measurement and Optimization Services, Q1 2026.

$

26

bn

in client value generated

50

+

years of experience

910

client recommendation score

What we think

Banker discussing with affluent client

Global bank uses MMM to identify 14% incremental income, drive affluent customer growth

View case study

AI creative effectiveness woman jumping advert

Research | 31 March 2026

AI is helping marketers to quantify creative impact – as featured in Advertising Week

Michael Penfold

News | 29 April 2026

Introducing… Michael Penfold, Senior Director, Analytics

Global retailer uses MMM to identify 25% sales uplift opportunity in emerging markets

View case study

Marketing effectiveness transformation report 2026 cover

Research | 31 March 2026

Gain Theory exposes why most marketing insights are failing to drive growth

Fergal Smithwick Gain Theory

News | 24 March 2026

Introducing… Fergal Smithwick, Senior Director, Client Success

Want to know what our industry-leading experts have to say?

Using our award-winning solutions, you can:

Focus on measuring what matters

Increase speed and quality of insights

Create value over the short and long term

Interested in our
award-winning solutions?

Start exploring

Meet our people

Michael Penfold

Meet our people

Michael Penfold

Senior Director, Analytics

Michael discusses the analytical techniques he using to model the future impact of interest rates on a retailer’s business, why you shouldn’t use AI to automate data analysis in its entirety, and why he listens to the David McWilliams podcast.