Michael Acton Smith: The Entrepreneur Behind Calm and Moshi Monsters

Introduction

Michael Acton Smith is a British entrepreneur, author, and technology businessman. He is best known for co-founding Calm, the popular meditation and sleep app. Before Calm, he created Moshi Monsters, an online game that attracted millions of children worldwide.

His business story started with unusual gifts. Then came online puzzles and virtual pets. Later, he moved into mental wellness.

Quite a change, right?

But his career wasn’t always easy. Some projects struggled. Others grew far beyond their original plans. He kept trying new ideas, even after facing setbacks.

Today, his name is closely connected with British entrepreneurship and the growth of Calm.

Quick Facts About Michael Acton Smith

Detail	Information
Full Name	Michael Acton Smith
Known As	Michael Acton Smith OBE
Date of Birth	3 September 1974
Age	52 years (October 2026)
Nationality	British
Profession	Entrepreneur, Business Founder, Author
Education	University of Birmingham
Degree	Geography
Graduation Year	1996
Known For	Calm, Moshi Monsters, Mind Candy
First Business	Firebox.com
Calm Co-Founder	Alex Tew
Major Honour	OBE (2014)
Sister	Anna Acton
Net Worth	Not publicly confirmed

Early Life and Background

Michael Acton Smith was born on 3 September 1974 in England. He grew up in Buckinghamshire and attended school in Marlow.

He enjoyed imaginative games from childhood.

Puzzles particularly caught his attention. Stories with hidden clues interested him, too.

One early influence was Masquerade, an illustrated puzzle book by Kit Williams. It encouraged readers to solve clues connected to a real hidden treasure.

That sort of thinking stayed with him.

Years later, he built businesses around games, mysteries, and unusual experiences. Perplex City was one example. Moshi Monsters was another.

His early interests eventually became business ideas.

Education and University Life

Smith attended Sir William Borlase’s Grammar School in Marlow, Buckinghamshire.

He later studied geography at the University of Birmingham, graduating in 1996.

His degree wasn’t in computer science.

It wasn’t in business management either.

Still, he eventually became known for building internet companies.

After university, he worked at Goldman Sachs in a human resources role.

That was an early stage of his working life. His entrepreneurial career soon took a different direction.

How His Business Career Started

In 1998, Smith co-founded Firebox.com with Tom Boardman.

The company began as an online retailer selling unusual gifts, gadgets, and entertaining products.

Its early name was Hotbox.

One memorable product was the Shot Glass Chess Set. It combined a traditional chessboard with drinking glasses.

A strange idea? Maybe.

But unusual products attracted attention.

Firebox grew into a recognised online retailer. In 2004, it appeared on The Sunday Times Fast Track 100 list of growing British private companies.

This early success showed Smith that creative products could find buyers online.

He soon wanted to build something different.

Mind Candy and His Move Into Online Entertainment

In 2004, Smith founded Mind Candy.

The company focused on interactive entertainment. Instead of selling physical gifts, it developed games and experiences that people could enjoy through the internet.

Its first major project was Perplex City.

The game mixed online puzzles with physical cards and a fictional mystery. Players worked through clues while searching for answers.

It was an ambitious idea.

Thousands of people took part. The project received attention from gaming communities and technology writers.

But popularity wasn’t enough.

Perplex City struggled commercially, and the game was eventually put on hold.

Smith had to rethink the business.

The next project would reach a much larger audience.

The Success of Moshi Monsters

Moshi Monsters became Mind Candy’s best-known creation.

The online game allowed children to adopt virtual monsters, give them names, care for them, and play games.

It also included puzzles and social activities.

Children enjoyed collecting virtual items. They could customise their monsters and return to the game regularly.

The idea worked.

Moshi Monsters grew into a major children’s entertainment brand during the late 2000s and early 2010s.

It attracted tens of millions of registered users worldwide. Smith’s professional profiles have cited figures around 80 million, while other historical accounts have reported approximately 90 million.

The brand soon moved beyond computers.

Moshi Monsters appeared in toys, books, magazines, trading cards, music, and video games. A feature film was released in 2013.

The business had grown far beyond its original online game.

Yet Smith eventually moved toward a completely different field.

Why Michael Acton Smith Started Calm

Running technology businesses can be exhausting.

Smith has spoken publicly about work pressure and periods of burnout during his entrepreneurial career.

He became interested in meditation.

His friendship with Alex Tew helped bring that interest into a new business idea.

Tew had already experimented with online projects and meditation. The two shared an interest in making mindfulness easier for ordinary people.

They decided to build Calm.

The service launched in 2012.

At first, some investors questioned whether people would pay for meditation content on their phones.

The idea seemed uncertain.

But Smith and Tew continued developing it.

Calm began offering guided meditation sessions. Later, the company added music, breathing exercises, and other relaxation content.

Sleep became an important part of the business.

One of Calm’s most recognised features is Sleep Stories, which provides narrated stories intended to help listeners relax before bedtime.

The company has featured well-known narrators, including Matthew McConaughey and Idris Elba.

Calm grew into an internationally recognised wellness brand.

How Successful Did Calm Become?

Calm reached a major financial milestone in December 2020.

The company announced a $75 million Series C funding round, valuing the business at $2 billion.

That figure attracted considerable attention.

Calm also reported more than 100 million downloads and four million paying members at the time.

The company expanded its services for employers through Calm for Business.

Its development showed growing commercial demand for meditation and sleep-related digital content.

In May 2025, Smith and Alex Tew appeared on the How I Built This podcast. They discussed the company’s early ideas, investor concerns, and business growth.

The podcast reported that Calm had reached 180 million total downloads by that period.

For Smith, Calm became another major business achievement after Firebox and Moshi Monsters.

Other Businesses and Creative Projects

Smith has worked on projects outside his two most famous businesses.

His professional background includes Ping Pong Fight Club and the Berwickstock music festival.

He has also been connected with Silicon Drinkabout, a social networking community for people working in London’s startup industry.

These interests reflect his long-standing involvement in entrepreneurship and creative communities.

He has spoken at business events and shared his experiences with founders.

His public discussions often cover company building, recruitment, creativity, meditation, and handling business pressure.

Awards and Professional Recognition

Smith received an OBE in 2014 for services to the creative industries.

OBE stands for Officer of the Order of the British Empire.

The honour recognised his work in creative business.

He has also appeared in several publications’ industry lists, including:

• The Guardian’s MediaGuardian 100
• Wired’s ranking of influential figures in Britain’s technology industry
• The Times’ 100 to Watch list

Calm received an important award in 2017, when Apple named it iPhone App of the Year.

That award belonged to the app, rather than to Smith personally.

Still, it marked an important moment for the company he helped establish.

Books and Writing

Smith is associated with the book Calm: Calm the Mind, Change the World, published in 2015.

The book encourages mindfulness through simple activities and ideas for everyday life.

Its content reflects the philosophy behind Calm.

Rather than treating meditation as something difficult, the book presents ways to bring short moments of calm into ordinary routines.

His publishing work connects with his wider interest in mental wellness.

Michael Acton Smith’s Family and Personal Life

Smith generally keeps his private family life away from public attention.

His younger sister is Anna Acton, a British actress.

Reliable public information about his spouse, children, and parents is limited.

He is known to have lived and worked in both the United Kingdom and the United States.

In a GBx interview, he said he moved to the San Francisco Bay Area in January 2016.

His professional life has included business activity in London and California.

Outside these publicly reported details, much of his family life remains private.

Michael Acton Smith Net Worth

People often connect Smith’s personal wealth with Calm’s business valuation.

But those figures are different.

Calm was valued at $2 billion during its December 2020 funding round.

That doesn’t mean Smith personally owned $2 billion.

A company valuation represents the estimated value of the business at a particular time.

An individual’s net worth depends on personal assets, investments, ownership stakes, and liabilities.

His exact personal net worth in 2026 has not been reliably confirmed through public financial records.

So any precise estimate should be treated carefully.

Business Challenges and Lessons

Smith’s career includes several changes in direction.

Firebox focused on physical products.

Mind Candy developed online entertainment. Perplex City attracted attention but struggled to support a lasting business.

Moshi Monsters became a major success.

Calm entered the wellness market with a completely different product.

These experiences show why he is often discussed in entrepreneurship circles.

He has been willing to test unusual ideas.

Some worked quickly. Others didn’t.

Perplex City, for example, showed that a popular product might still struggle financially.

Moshi Monsters showed how a digital game could become a wider entertainment brand.

Calm showed that a relatively simple idea could reach a large audience when the company kept improving its content and service.

His business history includes genuine setbacks, rather than uninterrupted success.

What Is Michael Acton Smith Doing in 2026?

Smith remains publicly associated with Calm as a co-founder and senior company figure.

His professional involvement has included leadership, business development, and work connected with the company’s long-term direction.

He also continues to be recognised for his earlier ventures.

In 2025, the How I Built This interview brought renewed attention to his experiences building Calm alongside Alex Tew.

His career now spans almost three decades, beginning with Firebox in 1998.

Few founders become known for both children’s online entertainment and meditation software.

Smith has built businesses in both fields.

Final Thought

Michael Acton Smith’s career has taken some unusual turns.

He started by selling gifts online. Then he created digital games. Years later, he helped make meditation accessible through an app.

There were difficult periods, too.

Perplex City didn’t become the lasting business he had hoped for. Other ideas found huge audiences.

His story shows a simple truth about entrepreneurship: a successful business often takes more than one attempt.

For Smith, each project became part of a longer working life shaped by new ideas and changing interests.

Frequently Asked Questions

1. Who is Michael Acton Smith?

Michael Acton Smith is a British entrepreneur and author. He co-founded Calm and created Moshi Monsters through Mind Candy.

2. How old is Michael Acton Smith?

He was born on 3 September 1974. He is 52 years old as of October 2026.

3. Who founded Calm?

Calm was co-founded by Michael Acton Smith and Alex Tew. The company launched in 2012.

4. What businesses has he founded?

His major businesses include Firebox.com and Mind Candy. He also co-founded Calm and developed projects such as Perplex City and Moshi Monsters.

5. Where did Michael Acton Smith study?

He studied geography at the University of Birmingham and graduated in 1996.

6. What is his net worth?

His exact personal net worth has not been publicly verified. Calm reached a $2 billion company valuation in December 2020.

7. Did he receive an OBE?

Yes. He received an OBE in 2014 for services to the creative industries.

8. What is Michael Acton Smith famous for?

He is famous for creating Moshi Monsters and co-founding Calm, a meditation and sleep app.