We apply insight to creativity in a way that adds value.
The result? Meaningful brand creative amplified powerfully across digital channels.

Read more
Our values

We want people to look at the brands we work with and say: "I wish we'd done that". We do it through tenacity, transparency and teamwork. This means we square up to challenges, are always upfront and believe in making meaningful partnerships with clients, collaborators and in our own teams.



Clarity, confidence and trust are at the heart of effective partnerships. There is no 'need to know basis', we lay it all on the line.

With partners, clients and across teams we share information and reasoning. We debate and discuss openly and honestly. We strengthen our relationships by being transparent, and as a result, produce better, more meaningful work.



There is always a way. We won't quit until we've found it. We cultivate a culture of tenacity, where challenges and problems are shared as much as solutions and successes. We celebrate drive, determination, positivity and persistence. We get the job done.



It's right at the core of the work we deliver: the way we work together. As an agency team, and with our clients. We are all heading for the same goal, and that means pulling in the same direction, leaning into individual strengths, and achieving the win together.

Our founders

Dom Carter

Dom has used technology to creatively market products, events and businesses since he was a teenager. After University, he founded his first business combining digital campaigns with creative executions. Dom then worked internally at a large Manchester-based agency building out their media team and client list before founding Serotonin in 2019. He now leads on digital strategy across the business.


Clair Heaviside

In 2004 Clair founded Odd Arts, a charity that transforms lives in prisons across the UK and South America. She has been marketing director and non-exec director of independent digital and social agencies, and now leads on creative strategy at Serotonin. She is also a Trustee of domestic abuse charity, Haven. Talk to her about brand differentiation, knowing your customer, and her dog Ben.

What our clients say
Ecommerce Director, Blake Mill

Ross French

The only Digital Marketing agency with the technical expertise and the strategy required to help us achieve consistent growth.

Brand Manager, Celebrity Cruises

Carla Tessio

Serotonin helped us expand our acquisition strategy and the top of the funnel. Their ability to use industry insights and translate that data into campaign delivery across creative and media helped us to reach our KPIs

CEO, NEUapparel

Rebecca Scott

Serotonin have helped drive my business forwards. We've
seen exponential growth across every campaign and introduced new marketing channels. As a result we have had our most successful months on record.

Get in touch

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.