Investment Stage

Focus Areas

About Investor

Cal Henderson is an Angel Investor at Slack and is based in San Francisco, United States. He focuses on SaaS, developer tools, enterprise technology, and AI companies at the Pre-seed and Seed stages. His investment work centers on scalable software, tools for software developers, business technology, and intelligent systems. Cal generally invests between $25K and $500K, with a preferred ticket of approximately $150K. As a lead investor, he contributes directly to technical assessment, company selection, early financing, and portfolio support. Through Slack and his angel investments, he supports founders building developer-focused and enterprise software businesses.