Billionaire Profile
Stewart Butterfield
Global Rank
#2481

Image: Public domain | via Wikimedia Commons

Stewart Butterfield

CEO, Slack Technologies
CA
Real-Time Net Worth
$1.5B
As of December 2025
Age
52
Source
Messaging software
Industry
technology
Citizenship
CA

Biography

Stewart Butterfield (born 1973) is a Canadian billionaire businessman and a prominent figure in the tech industry. He is best known as the co-founder of Flickr, the pioneering photo-sharing website, and Slack, a leading team-messaging and collaboration platform. Butterfield's net worth is approximately $1.5 billion as of December 2024. His wealth stems primarily from his success with Slack, which was acquired by Salesforce in 2020 for $27.7 billion. Before Slack, Butterfield co-founded Ludicorp, which developed the online game and subsequently, the photo-sharing platform Flickr. Butterfield's career has been marked by his ability to identify and capitalize on emerging trends, demonstrating leadership and innovation in the technology sector.

Wealth Over Time

In-Depth Profile

Early Life and Education

Daniel Stewart Butterfield was born in Lund, British Columbia, Canada, on March 21, 1973. He spent his early childhood in a log cabin without running water or electricity, growing up in a commune. His family later moved to Victoria when he was five. He taught himself to code and changed his name to Stewart at 12.

Rise to Success

Butterfield's career began with his co-founding of Ludicorp in 2002, which developed the online game Game Neverending. When that project failed, he and his team pivoted to create Flickr. Flickr quickly gained popularity, becoming a cornerstone of the early web 2.0 era and was acquired by Yahoo! in 2005. After leaving Yahoo! in 2008, Butterfield co-founded Tiny Speck in 2009. During the development of the multiplayer game Glitch, he and his team created an internal communication tool that would become Slack. The platform was launched in 2013 and gained rapid adoption, transforming team communication. Slack was acquired by Salesforce in 2020 for $27.7 billion.

Key Business Strategies

Butterfield's success can be attributed to his ability to pivot from failed ventures and identify market opportunities. His background in philosophy provided him with the critical thinking skills and unique perspective needed to approach problems in novel ways. He emphasizes the importance of building a strong product, customer service, and fostering a positive company culture. Butterfield's philosophy degree has played a part in how he runs his business.

Philanthropy

Butterfield has pledged to share most of his wealth for good causes. He has supported efforts like fighting climate change, helping those in poverty, and promoting education.

Career Milestones

2002

Co-founded Ludicorp

Co-founded Ludicorp, the company that developed Flickr.

2004

Launched Flickr

Launched the photo-sharing website Flickr, which was later acquired by Yahoo!

2005

Acquisition by Yahoo!

Yahoo! acquired Flickr for approximately $30 million.

2009

Co-founded Tiny Speck

Co-founded Tiny Speck and began development of the game Glitch.

2013

Launched Slack

Launched Slack, the team-messaging application, which quickly gained popularity.

2020

Salesforce Acquisition

Salesforce acquired Slack for $27.7 billion.

2022

Departure from Salesforce

Butterfield departed Salesforce in December 2022.

Philanthropy & Social Impact

Various

Various Causes

Undisclosed

Butterfield has supported efforts like fighting climate change, helping those in poverty, and promoting education.

Business Philosophy & Leadership

Notable Quotes

"It sucks to be the CEO of a startup that's doing super well."

Leadership Principles

Empathy

Butterfield emphasizes the importance of understanding and addressing the needs of both employees and users.

Clear Communication

Butterfield values clear thinking and rigorous analysis, key skills for leadership.