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Stewart Butterfield

Stewart Butterfield

Stewart Butterfield is a Canadian entrepreneur, designer, and technologist, known as the co-founder of Flickr and Slack.

Early years and education

Butterfield was born in a small fishing village called Lund in British Columbia in 1973. He grew up for the first three years of his life in a commune in remote Canada without running water. At 5 years old, his family moved to Victoria, British Columbia and a few years later got a family computer. Butterfield went to St. Michaels University School in 1986 and taught himself to code since he was a kid. He earned money when he was in college by designing websites. In 1996, Butterfield got his BA in Philosophy from the University of Victoria and in 1998 got his Master of Philosophy from the University of Cambridge. He specialized in the philosophy of biology, cognitive science, and philosophy of mind.


In 2000, Butterfield joined his friend Jason Classon and built a startup called where he co-wrote the business plan, raised the investment capital, and also helped in negotiating Gradfinder’s acquisition by, maintaining a healthy profit for investors and employees.

In the summer of 2002, together with his then-wife Caterina Fake and friend Jason Classon, he co-founded Flickr (Ludicorp Research and Development Ltd.) Butterfield was responsible for finance and product direction. Butterfield, together with his team, created Flickr where users could share photos. It didn’t’ turn out really well as people could only share photos when they’re online. After a few changes and updates, Flickr was eventually sold to Yahoo in 2005 for around $22 million.

In the year 1996 – 2000, he was also a software and internet product design consultant in different roles – user research, interaction design, visual and interface design, design management, and even business development and strategic consulting.

As part of the acquisition, Butterfield and Fake joined Yahoo! as the General Manager of Flickr until he left Yahoo! in July 2008.

When Butterfield left Yahoo, he founded a start-up called Tiny Speck and built the multi-player game called Glitch. Tiny Speck made some wrong technical choices and Glitch turned out not to be a good idea.


In August of 2013, Butterfield released Slack – an instant messaging team communication tool that was built by the same people behind Tiny Speck. They built the app to chat and communicate together while working on Glitch. After it was released to public in February 2014, the tool grew at a weekly rate of 5% – 10%, with over 120,000 daily users registered in the first week of August 2014. As of August 2014, Slack had raised US$60 million in venture capital and had garnered US$1.5 million in revenue.

In 1999, Butterfield became the director of the design group in where he acted as the design lead of at the time, the largest design and development shop in Vancouver. At the age of 26, he managed several million dollars worth of projects and played a big role in the company’s rapid growth


March 21, 1973
Stewart Butterfield was born.

Invested in


Further reading


Documentaries, videos and podcasts



Connie Loizos
August 24, 2021
When Salesforce acquired Slack at the end of last year for almost $28 billion, the deal seemed on its face to make sense, given that the coronavirus pandemic accelerated already growing demand for tools that enable people to work remotely and that roughly 90% of Slack's enterprise customers already used Salesforce. Today, the question is: How well are things going? [...]
Paayal Zaveri
December 12, 2020
Business Insider
By acquiring Slack for $27.7 billion, Salesforce will revamp its collaboration product strategy. These are the execs that will drive it's vision.
Megan Hernbroth and Avery Hartmans
December 3, 2020
Business Insider
Slack started as a video game called "Glitch." Then it became so much more, and Stewart Butterfield has been the person overseeing it all.
Paayal Zaveri
December 2, 2020
Business Insider
Salesforce's massive acquisition of Slack spurred the CEOs of both companies to send explanatory messages to their workers.
Steve Lohr and Erin Griffith
November 22, 2019
The move of entrepreneurs, engineers and venture investors away from the consumer internet and to enterprise software has piqued regulator interest.


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