Felicis Profiles Arena's Journey: From Berkeley PhD Project to $3.1B Valuation
pxd · x · 2026-10-09
As a companion to Arena's $200M Series B at a $3.1B valuation, Felicis published a long-form profile of founders Anastasios Angelopoulos and Wei-Lin Chiang, who built Chatbot Arena as Berkeley PhD students in 2024 — blind human-preference ranking of anonymous models. The site outgrew its research origins, drawing tens of thousands of monthly users, with frontier labs testing models there before public release. Felicis invested at seed and led the Series A.
Related event: LMArena Raises $200M Series B at $3.1B Valuation, Launches Alignment Index(9 posts)→
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