Stewart Butterfield is a Canadian-American billionaire entrepreneur best known as the co-founder of two groundbreaking internet platforms: the photo-sharing service Flickr and the workplace messaging tool Slack. Born Daniel Stewart Butterfield on March 21, 1973, in Lund, British Columbia, he turned a philosophy degree into a career building products that changed how people communicate online. After leading Slack from its 2013 inception through its $27.7 billion acquisition by Salesforce in 2021, Butterfield stepped down as CEO in January 2023. His net worth is estimated at approximately $1.5 billion as of 2026.

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Slack Technologies Competitors

Slack operates in the highly competitive enterprise collaboration and messaging space. The key competitors of Slack Technologies include:

• Microsoft Teams – Slack’s largest rival with 320+ million monthly active users, deeply integrated into the Microsoft 365 ecosystem
• Google Workspace (Chat) – Google’s enterprise communication suite competing for business messaging
• Zoom Workplace – expanded from video conferencing into team messaging and collaboration
• Discord – originally for gamers, increasingly used by teams and communities
• Cisco Webex – enterprise-grade collaboration platform from Cisco Systems
• Mattermost – open-source alternative to Slack for self-hosted enterprise messaging
• Basecamp – project management tool with built-in team communication features

Stewart Butterfield – Quick Facts

Stewart Butterfield Net Worth 2026 – Former Slack CEO Salary

As of 2026, Stewart Butterfield’s net worth is estimated at approximately $1.5 billion USD. The bulk of his wealth comes from his equity stake in Slack Technologies, which was acquired by Salesforce for $27.7 billion in July 2021. Butterfield’s Salesforce shares, combined with prior stock sales and real estate investments estimated at over $140 million, form the foundation of his billionaire status.

Stewart Butterfield Compensation History (Slack Technologies)

Slack Technologies Net Worth 2026 – Company Financials

Slack Technologies is now a wholly-owned subsidiary of Salesforce (NYSE: CRM) following the $27.7 billion acquisition completed in July 2021. As part of the Salesforce ecosystem, Slack’s financials are reported within Salesforce’s “Platform, Slack and Other” segment.

Slack / Salesforce Financial Summary

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Contact Stewart Butterfield – Email Address | Twitter | LinkedIn

Below are the known contact details and social media profiles for former Slack CEO Stewart Butterfield:

Career & Education – Company, University, & College

Stewart Butterfield’s career is defined by a rare talent for turning failed game projects into wildly successful communication platforms. Both Flickr and Slack were born as pivots from online games, making Butterfield one of tech’s most celebrated serial entrepreneurs.

Stewart Butterfield Career Timeline

Butterfield began his career as a freelance consultant specializing in software and internet product design from 1996 to 2002. In 2002, he co-founded Ludicorp in Vancouver with Cal Henderson, Eric Costello, and his then-wife Caterina Fake. While building the online game “Game Neverending,” the team created a photo-sharing feature that became Flickr — one of the web’s first major social media platforms. Yahoo acquired Flickr in March 2005 for an estimated $35 million, and Butterfield stayed on as General Manager until departing Yahoo in July 2008.

In 2009, Butterfield co-founded Tiny Speck to build another online game called Glitch. When Glitch failed to attract a sustainable user base and shut down in 2012, the team pivoted their internal communication tool into a standalone product. Slack launched in August 2013 and grew at a staggering 5–10% weekly rate, quickly becoming the fastest-growing enterprise software product in history.

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Slack went public via a direct listing on the NYSE in June 2019, opening at $38.50 per share with a market capitalization of $21.4 billion. In December 2020, Salesforce announced its acquisition of Slack for $27.7 billion, the deal closing in July 2021. Butterfield continued as CEO of Slack within Salesforce until announcing his departure in December 2022, officially leaving in January 2023.

Education

Stewart Butterfield Wiki – Age, Family, & More

Stewart Butterfield (age 52) was born on March 21, 1973, in the remote community of Lund, British Columbia, Canada. His birth name was Dharma Jeremy Butterfield — his parents, Norma and David Butterfield, were counter-culture hippies who raised him in a log cabin without running water or electricity for the first five years of his life. His father had moved from the United States to Canada to avoid being drafted for the Vietnam War. When Stewart was five, the family relocated to Victoria, British Columbia, where he taught himself to program on a Commodore 64.

Butterfield was first married to Caterina Fake, his Flickr co-founder, from 2001 to 2007. They have one daughter together, born in 2007. In May 2019, he became engaged to Jennifer Rubio, co-founder and CEO of the luggage brand Away. The couple married in 2020 and have a son and a daughter together. They currently split their time between Aspen, Colorado and New York.

Notable Achievements & Recognitions

• Forbes Billionaire – Listed on the Forbes Billionaires List with an estimated net worth of ~$1.5 billion
• Two Pivots, Two Hits – One of very few entrepreneurs to create two billion-dollar companies (Flickr and Slack) both as pivots from failed video games
• Fastest-Growing Enterprise Software – Slack became the fastest-growing business application in history at launch
• $27.7B Acquisition – Led Slack through its acquisition by Salesforce, the largest enterprise software deal at the time
• UVic Distinguished Entrepreneur – Honored by the University of Victoria as a Distinguished Entrepreneur (2018)
• Art Collector – Named to the ARTnews Top 200 Collectors list alongside wife Jennifer Rubio

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About Slack Technologies

Slack Technologies is a cloud-based enterprise messaging and collaboration platform founded in 2013 by Stewart Butterfield, Cal Henderson, Eric Costello, and Serguei Mourachov. Originally developed as an internal communication tool at Tiny Speck during the development of the game Glitch, Slack launched publicly in February 2014 and rapidly became one of the most widely adopted enterprise software tools in history.

The name “Slack” is actually a backronym standing for “Searchable Log of All Conversation and Knowledge.” The platform allows teams to communicate through organized channels, direct messages, file sharing, and integrations with thousands of third-party applications.

Frequently Asked Questions (FAQ)

Who is the current CEO of Slack?

As of early 2026, Slack’s interim head is Rob Seaman, the Chief Product Officer, who stepped into the role after CEO Denise Dresser departed for OpenAI in December 2025. Stewart Butterfield, the co-founder, served as CEO from 2013 until January 2023. Lidiane Jones succeeded him briefly (January–November 2023), followed by Denise Dresser (November 2023–December 2025).

What is Stewart Butterfield’s net worth in 2026?

Stewart Butterfield’s net worth in 2026 is estimated at approximately $1.5 billion USD. His wealth primarily derives from his founding equity stake in Slack Technologies, which was acquired by Salesforce for $27.7 billion in 2021. He also holds significant real estate investments valued at over $140 million.

What was Stewart Butterfield’s salary as Slack CEO?

During his tenure as Slack CEO, Stewart Butterfield earned an average of $7.3 million per year in total compensation. In FY2020, his total pay was approximately $4.3 million (including a $430,000 base salary), while in FY2019, it was around $10.3 million, with stock awards comprising over 95% of total compensation.

What is Stewart Butterfield’s email address?

Stewart Butterfield’s known email during his time as CEO was [email protected], though this address may no longer be active since his departure in January 2023. He can be reached via Twitter/X at @stewart or on LinkedIn.

What did Stewart Butterfield do before Slack?

Before founding Slack, Stewart Butterfield co-founded Flickr, the pioneering photo-sharing platform, in 2004. Flickr was acquired by Yahoo for approximately $35 million in 2005. He also co-founded Tiny Speck in 2009, which built the online game Glitch. When Glitch shut down in 2012, the team’s internal communication tool became Slack.

Why did Stewart Butterfield leave Slack?

Stewart Butterfield departed Slack in January 2023, roughly two years after Salesforce completed its $27.7 billion acquisition. He announced he was stepping away to focus on personal interests, family time, and health. He stated he was not planning to pursue anything entrepreneurial, noting that his “fantasies are about gardening.”

Article last updated:March 2026March 2026