System1 Group

Predicts and improves ad effectiveness through emotional insights

System1 Group enables marketers to create with confidence by utilizing a methodology deeply rooted in behavioral science. The agency offers specialized services such as 'Test Your Ad', 'Test Your Innovation', and 'Test Your Brand', which focus on measuring emotional responses to enhance advertising effectiveness. By placing emotion at the center of their validated metrics, System1 Group helps brands unlock profitable growth.

With the world's largest database of emotional norms, System1 Group provides insights into the creative dividend and the costs associated with dull digital content. Their research is trusted by established brands, including Pfizer, which relies on System1 for all its advertising needs. The agency's work highlights how creativity boosts performance and explains the advertising principles of Orlando Wood.

System1 Group's influence extends across various markets, as seen in initiatives like the Nation’s Favourite Ads in the UK and US, and The Greenprint projects in the USA and Brazil. By focusing on emotional insights, System1 Group assists marketers in connecting with consumers on a deeper level, ultimately enhancing the effectiveness of their advertising strategies.

26
YEARS IN BUSINESS
1
SERVICE

Capabilities

Agency details

Founded
2000 (26 years)

About this agency on Agency List

System1 Group holds an Agency List Score of 97 out of 100.

That score is higher than 98% of the 36,920 agencies Agency List has assessed so far.

The Agency List Score measures how well an agency documents its work in public: named clients, quantified outcomes, and whether those outcomes are attributed to the agency rather than to the client.

It does not measure client satisfaction, price, or availability.

How the Agency List Score is measured

Assessment date

Agency List assessed System1 Group in September 2026, reading 8 pages published on system1group.com.

The score reflects what System1 Group had published by that date; anything published since has not been read.

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