Arena
Founded
2025
Status
Private
Leadership
Anastasios Angelopoulos - Co-founder & CEO
Wei-Lin Chiang - Co-founder & CTO
Ion Stoica - Co-founder & Chairman
LSVP Investment
2025
Stage Invested
Series A
Lightspeed Team
Bucky Moore - Partner
James Alcorn - Partner
Ravi Mhatre - Partner & Co-Founder

Created by researchers from UC Berkeley, Arena (formerly LMArena) is a community-powered platform for understanding AI performance in the real world. Tens of millions of builders, researchers, and creative professionals come to Arena to use frontier models and give feedback on their responses, shaping a public leaderboard grounded in real-world use.

Arena
Fraction Fraction

Faction Ventures, L.L.C. ("Faction") and Lightspeed Management Company, L.L.C. ("LSVP") are separate businesses that operate independently of each other. Faction advises its own fund(s) and does not advise any LSVP clients, and LSVP does not advise Faction or any of its clients. LSVP and Faction are parties to an agreement pursuant to which LSVP holds certain interests in Faction and the fund(s) Faction manages.

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INDIA INDIA

Lightspeed Management Company, L.L.C. ("LSVP") and Lightspeed India Partners, L.L.P. ("LSIP") are distinct investment advisory entities, are not a unitary enterprise and operate independently of one another. From time to time LSVP may draw on its relationship with LSIP, and vice versa, but only to the extent consistent with its status as a separate investment adviser.

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Lightspeed Management Company, L.L.C. ("LSVP") and LSIP are distinct investment advisory entities, are not a unitary enterprise and operate independently of one another. From time to time LSVP may draw on its relationship with LSIP, and vice versa, but only to the extent consistent with its status as a separate investment adviser.

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When changing this filter to include “LSIP”, you will view personnel associated with Lightspeed India Partners, L.L.P ("LSIP")Lightspeed Management Company, L.L.C. ("LSVP") and LSIP are distinct investment advisory entities, are not a unitary enterprise and operate independently of one another. From time to time LSVP may draw on its relationship with LSIP, and vice versa, but only to the extent consistent with its status as a separate investment adviser.

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