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We didn't set out to build a chat tool. We set out to build a game. But the chat tool was what actually worked.
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I've failed at making video games twice. Both times, I accidentally built a billion-dollar company.
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Philosophy taught me more about product design than any engineering course ever could.
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The best products come from solving your own problems. If you need it, others probably do too.
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Flickr sold for $25 million to Yahoo. Slack sold for $27.7 billion to Salesforce. Same formula, better timing.