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

CPG giant accelerates data quality, delivery times, creative ROI

View case study

Research | 2 February 2026

Gain Theory, a WPP company, named a leader in marketing measurement and optimization by global independent research firm

News | 23 February 2026

Introducing… Tasha Webb, Head of Data

Karen Kaufman | Gain Theory Global Growth Officer

News | 28 January 2026

Introducing… Karen Kaufman, Global Growth Officer

Research | 11 November 2025

Gain Theory unveils five essential strategies to navigate the crowded MMM landscape in 2026

Yoga influencer films herself

Global brand unlocks 27% hidden value from sponsorship investments

View case study

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?

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Meet our people

Meet our people

Tasha Webb

Head of Data

Tasha Webb shares her views on everything data related - from the importance of trust and quality to getting it AI ready and overcoming fragmentation.