Stewart Butterfield
High National Level Public Record
Editorial estimate, not verified fact — DisclaimerCo-founder of Slack and Flickr
Data Confidence: 81% · Sources: 4 · Last Updated: Sep 18, 2026
- Net Worth ▲
- $1.6B
- Reach ▲
- 35.0M people
- Power ▲
- Butterfield directed product execution and corporate strategy at Slack as CEO, taking the enterprise messaging platform public via direct listing before negotiating its $27.7 billion sale to Salesforce.
- Influence ▲
- He reshaped modern enterprise communication workflows and early Web 2.0 social photo aggregation through user-centric software design.
- Network ▲
- Maintains high-level founder and venture capital ties across Silicon Valley and North American tech ecosystems, alongside former executive relationships at Salesforce and Yahoo!.
- Legacy ▲
- Pioneered social image sharing with Flickr and established the dominant model for corporate channel-based messaging with Slack.
- Trajectory ▲
- Stable — first assessment on record.
About
Stewart Butterfield is a Canadian technology entrepreneur who co-founded Flickr and Slack, two foundational platforms in modern internet history. He earned degrees in philosophy from the University of Victoria and the University of Cambridge. In 2004, Butterfield co-founded Flickr, pioneering early Web 2.0 photo sharing before its sale to Yahoo! in 2005. He later founded Tiny Speck, which created Slack, transforming workplace collaboration software and culminating in a $27.7 billion acquisition by Salesforce in 2021.
Known For
Co-founding photo-sharing website Flickr and team communication software Slack.
Connections
Leadership & Employment
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