Byrne Hobart, Angel Investor

Byrne Hobart is the writer and founder of The Diff, a daily newsletter launched in 2020 that covers inflections in finance and technology. The publication has become widely read by venture capitalists, analysts, traders, startup CEOs, journalists, and policymakers, with its weekly free edition reaching more than 48,000 readers. Byrne previously served as VP and Consumer Analyst at M Science, where he covered industries including airlines, lodging, cruise lines, and theme parks. His career reflects a consistent focus on data‑driven analysis and market insight. Byrne held roles as Lead Internet Analyst at 7Park Data, contributed to growth and business development at 21.co, and earlier worked as a consultant in internet marketing and strategy. He has built a reputation for combining rigorous research with accessible writing, making complex financial and technological trends understandable to a broad audience. As an angel investor, Byrne has backed ventures in AI and developer tools. His investment in PromptLayer, a seed‑stage company valued at $4.8M in 2025, reflects his interest in supporting platforms that enhance productivity and innovation in the emerging AI ecosystem.